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8/21/2019 Pathria Statistical Mechanics persian solution
1/210
-(
),()()(
1EE oo-
.1E
1E1E
.
(
A1A1E 2
.
:
( ) ( ) ( ) ( ) ( ) ( ) ( ) ( )( )
( ) ( )( ) ( ) ( )
( )
( )
, ,
,
E E E E E E E E E
E E E E E
= = =
=
1 2 1 1 2 2 1 1 2 1 1
1 1 1 2 1
o o oo
o o o
:
( )( )
( )( ) ( )( ) ( ) ,( , )E E
d E EdP EP E C E E
dE dE =
= = =11
1 1
1 1
1 1
o o
o oo o
8/21/2019 Pathria Statistical Mechanics persian solution
2/210
( )P E1 E1.
1
o:
( ) ( ) ( ) ( )
( ) ( )
lnln ln
ln
E E
E E
EE E E E
E
EE E
E
=
=
= +
+ +
!
1 1
1 1 1 1 1 1
11 1
22
1 1
1 12
11 1
1000
2
( ) ( ) ( ) ( )
( )
( )
lnln ln
ln
E E
E E
EE E E E
E
E
E EE
=
=
= +
+ +!
2 2
2 2 2 2 2 2
22 2
22
2 1
2 222
2 2
1000
2
( ) ( ) ( ) ( )ln lnE E
E E E E E EE
=
= + + +
!
21
1 1 1 1 1 1 1 1 1
11 1
1000
2
( ) ( ) ( ) ( )ln lnE E
E E
E E E E E EE
==
= + + +
!
22
2 2 2 2 2 2 2 2 22 2
22 2
1000
2
:
( )( ) ( ),E E E E E E = = = + = +1 2 1 2 1 2o o
( )E E E E = 22 1 1
8/21/2019 Pathria Statistical Mechanics persian solution
3/210
.
( ) ( ) ( ) ( )
( ) ( ) ( ) ( )( ) ( )
ln ln ...
ln ln
E E
E E
E E E E E EE
E E E E E E E EE
=
=
= + + +
!
= + + !
2
1 1 1 1 1 1 1 1
11 1
2
2 1 2 1 1 1 1 12
2 2
1
2
1000
2
o o
( ) ( ) ( ) ( )
( )
( ) ( )ln ln ln lnE E E E E E
E EE E
+ = +
+ + +
1 1 2 1 1 1 2 1
2
1 1
1 2
1000
2
o o
( ) ( ) ( ) ( ) ( )( ) ( )ln lnE E E E E E E E = + 2
1 1 2 1 1 1 2 1 1 1
1
2
o o
( ) ( ) ( )( ) ( ) ( ) ( )ln , ln ,E E E E E E = + 2
1 1 1 1
1
2
o o o o
( )( )
( )( ) ( )
( ) ( )
,exp
,
E EE E
E E
=
21
1 1
1
1
2
o o
o o
E E
= + = +
1 21 2
:
( )
Tk T
E E k T E
= = = < < 1 2
1 1
1
1 1
o o o
8/21/2019 Pathria Statistical Mechanics persian solution
4/210
( )( )
( ) ( ) ( )( ) ( )
( ) ( )
,ex p
,
E EE EE E P E Ce
E E
= =
1 22 1 121
1 1 1
1
1
2
o o
o o
:C
( ) ( )
( ) ( )( )
E E
E E
P E dE Ce dE
C C
P E e
+ +
= =
= =
=
21
12
1 1 1
21
12
1
1 1
21
2
2
o
o
.e
1
:
( ) ( )
( ) ( )ln
,E EE E
E E E
E
EE
==
= =
= + = =
12 2
21 1 1
212
21 1 2 2
11 2
2
2
)
NE N k T
= =
3 3
2 2
( )
= +1
21 2
2
8/21/2019 Pathria Statistical Mechanics persian solution
5/210
.
( )( )
N
E E
N N
E E E E
= =
= = =
1
1 2
1 1
2 2
2 2 2
2 2 1
3
2
3 3
2 2 o
( )( )( )
N N
E E E
= + = +
1
21
1 22
1 2 2 2
1 1
3 32 2
2 2 o
-S =)( fS
.
)(f.)--(
:
( ) ( )tot i i ii i
S f S S f = = =
( )
( ) ( ) ( )
t ot i i i iii i
f f
f f f
= =
= + +
1 2 1 1 2 2000 000
fdf d
d d d
=
= + +
1 2
1 2
000
8/21/2019 Pathria Statistical Mechanics persian solution
6/210
fdf d
d df fd
= +
= + = + +
1
1
1 2
1
1 1 2
000
000 000
)(
( ) ( ) ( ) f f
f f f df d d
= + + = + +
1 2
1 1 2 2 1 2
1 2
000 000
)(
( ) ( ), f ff
cte
= = = =
1 2
1 2
1 2
1 2 000
( ) lnd
df C f k
= =
-,B A.
,B A
V V
A
A
dE
dN
A B B A
B A
T T
T T
,T
.
:
A BS S S + o o
8/21/2019 Pathria Statistical Mechanics persian solution
7/210
.
( ), , S S S
S S E V N dS dE dV dN E V N
V Const dV
= = + +
= = o
S SdS dE dN
E N
= +
, ,
, ,
A AA B A A
A AN V E V
B BB B
B BN V E V
S SS S dE dN
E N
S SdE dN
E N
+ = +
+ +
dE TdS PdV dN = +
,V N
S
E T
=
1
)(
,E V
S
N T
=
)(
A B A B A BN N N Const dN dN dN dN+ = = + = = o
)(
A B A B A BE E E Const dE dE dE dE+ = = + = = o
)(
:
8/21/2019 Pathria Statistical Mechanics persian solution
8/210
A BA B A A B B
A A B B
S S dE dN dE dN T T T T
+ = +
1 1
A BA A A A
A B A B
dE dE dN dN
T T T T
= +
1 1
B AA A
A B B A
dE dN T T T T
= +
1 1o
mi n
A B A A B A B A A B
A B A A B A
dE T T dE T T
dN T T dN T T
=
)(-
N
)( oVNV )( 1+N
.
oV
3.VNV
8/21/2019 Pathria Statistical Mechanics persian solution
9/210
.
( )NN
N uu uV
V V V
121 1 00000 1
. . .NN
u uCV
V V
=
21 1
.C
( )
ln ln ln ln ln
ln ln ln
ln! !
N
N
m
u uC N V
V V
m uC N V
V
x xx x
=
= + + + +
= + +
=
1
1
2 3
21 1 000
1
1 00002 3
( )
ln ln ln
ln ln
N
m
uS k k C N k V k m
V
N N uk C N k V k
V
== = +
= +
1
1
1
2
( ) ( ),N E
k N N u N uP S N k N k T V V V V V
= = + = + 2
1 1122
uV
.
( )N uPV N k T
V
= +
11
2
8/21/2019 Pathria Statistical Mechanics persian solution
10/210
V
V
u
.
:
u V
= = =
3
34 48 8
3 3 2 o
Vo
2
.
( )N VPV N k T
V
= +
8 11
2
o
N VN PV N k T
V
>> +
41 1 o
-/1o3oo
.
41o
:
/
L mP atm
E J
R m T c
= = =
= =
4
11
11
32
oo
oo
8/21/2019 Pathria Statistical Mechanics persian solution
11/210
.
/ ,
/ /
EJPV N k T N k P PV E K V
N k T E N k T E
T T K
= = = =
= =
= =42
2 2265
3 3
2 2
3 3
21 265 28 5
3
o
o
o o
-
) , , ) ( )x y z x y z
hcE n n n n n n
L= + +
12 2 2 2
2.
-)--(
V
P
C
C
3
4
3
5.
:
( , , ) ( , , )x y z x y z
hcE n n n n n n
L=
1
2
2
( , , )
( , , )
( , , )
x y z
x y z
NN x N y N z
En n n L
hc
En n n L
hc
En n n L
hc
=
= =
1
2 2 2 121 1 1
1
2 2 2 22
1 1 1
1
2 2 2 2
2
2
2
M
8/21/2019 Pathria Statistical Mechanics persian solution
12/210
( ) ( )x y z N x N y N z
N
L En n n n N N
hc
E E E E E
+ + + + + + =
= + + + +
1 12 2 2 2 2 22 2
1 1 1
1 2 3
2000
000
.
L E
hc
2.
x y
L E L En n
hc hc= =
1 1
2 2
N
N N
L ES C
hc
= =
3 12
:
lnS k=
ln ( ) lnN
L ES k C k N
hc= +
23 1
( )ln , ln = =2
3N
L ES k N k C
hc
.N N3 1 3
exp ,
hc S
E L VL k N
= =
1
3
2 3
,
exp expN V
hc S E hc S E T
N k S N k L N kV
ET E N k T
N k
= = =
= =
1
3
1
3 3 2 32
33
8/21/2019 Pathria Statistical Mechanics persian solution
13/210
.
( )
,
,
,
VN V
p
N T
EE N k T C N k
T
E E EC E PV P PV
T V V
= = =
= + = = =
3 3
3 3
v
( ) p
p
CEC E k N N k
T C
= + = = = =
4 43 4
3 3 3
-
(n) nh n , , , = = 1 2o
.N
Eh
Nh
E.
:
:
( ) , , ,.. .n n h n = =1 1 1
1 2o
:
( ) , , ,. . .n n h n = =2 2 2 1 2o
:
( ) , , ,. . .n n h n = =3 3 3
1 2o
M
N
:
( ) , , ,. . .N N N
n n h n = = 1 2o
8/21/2019 Pathria Statistical Mechanics persian solution
14/210
EN
)E)N
( ) ( ) ( ) ( )N N
E n n n n n n n n h R h = + + + = + + + =1 2 1 2
000 000
ER
h=
Rh.
R
RN
:
[ ]( )!
ln ln( )! ln ! ln( )!!( )!
N RS k k N R R N
R N
+ = = = +
1
1 11
N>>1N N1.
[ ]
,
( ) ln( ) ln ln
lnN V
S k N R R N R R N N
S S R k R N
T E R E h R
= + +
+ = = =
1
ln
hT
N hk
E
=
+
1
1
E
N h
N h
E
o
ln ( )N h
E
+ 1 o: T
-),,( EVNS
:
8/21/2019 Pathria Statistical Mechanics persian solution
15/210
.
, , ,
+ + = V E N E N V
S S SN V E S
N V E
S
T
)EPVN(=
++
N E PV TS = +
.
:
.
( ) ( )( ) , , , ,
N N
V V S S S N V E S N V E
E E
= =
, , ,V E N E N V
S S SdS dN dV dE
N V E
= + +
( ) ( ),dS S S S dN N = = = 1 1
( ) ( )dV V dE E = = 1 1
( ) ( ) ( ) ( )S S S
S N V E N V E
= + +
1 1 1 1
, , ,V E E N N V
S S SN V E S
N V E
+ + =
PN V E S PV E T S N
T T T
+ + = + =
1
8/21/2019 Pathria Statistical Mechanics persian solution
16/210
-
k3. o o
:, , / ,m V N T k
E N k T
= = = =
23
2 2 2 2
2 2 2
4 6 2 1 3
3
2
oo o o oo
:
, , /m V N
S S
E N k T
= =
= =
23
1 1 1
1 2
1 1 1
4 6 2 1
3
2
o o
:
ln lnV m E V m E
N k N k N k N kh N h N
+ = +
1 1
2 21 1 1 2 2 2
1 1 2 23 3
1 2
4 43 3
3 2 3 2
:
,N N V V m E m E m N k T m N k T= = = = 1 2 1 2 1 1 2 2 1 1 1 2 2 2
3 3
2 2
m T m T T T k = = =1 1 2 2 1 14 4 3 3 oo oo ooo
-3 o o
.
:
8/21/2019 Pathria Statistical Mechanics persian solution
17/210
.
.
, ( )n R T n R T nR T
V V V n n nP P P
= + = + = +1 21 2 1 2
ln ln ,iT i i i i
i i
N NV n T
S N R N k N n N V h N N
=
= = + + = =
2 1
21
2
43 2
12
o
o
o
// /
/
nR T V V V
P N N
= = = =
15
5 3
23
1 2
1 23 11 23 1 5 1 1
4 4 6 2 1
oo o
o o
, ?N m m= =1 2
14o
( )
( )
/
/
/
/ /
m T
h
V V
N Nm T
h
=
= = =
3
1
2234
3
32
2
2234
2 2 3 14 14 3 1
6 63 1
4 2 4 1
2 16 3 1
2 3 14 1 55 1
o
oo o
o
o o
oo o
o o
-
)-(.
,)( , ,2 2 1 1
V N V N ( ) o 21S
N N
V V=1 2
1 2
)(. , , ,V N V N 2 2 1 1
( ) ( ) ( ) o= SSS N2N121.
8/21/2019 Pathria Statistical Mechanics persian solution
18/210
)( )( 21 NN +
( ) ( ) 221
lnkNNS + =N N1 2
.
:
( ) ( ) ln ln ln
( ) ln ln ln ln ln
V V V V S k N N N N
N N N N
V Vk N N N N N N N V N V
N N
+ = +
+
+= + + +
+
1 2 1 2
1 2 1 2 1 2
1 2 1 2
1 2
1 2 1 1 2 2 1 1 2 2
1 2
( ) ln ln
,
V V N V V N S k N N
N N V N N V
N NnV m V N nN
V m V
+ + = +
+ +
= = =
1 2 1 1 2 2
1 2 1 2
1 2 1 1 2 2
2 1
2 1 2 1
2 1
:n m
( )( ) ln ln
( )
m V N m nS k N N
n N V n m
+ + = + + +
1 1
1 2 1 2
1 1
1 1
1 1
( ) ( ) ln m n
S k N N k N lnn m
+
= + ++1 2 1 2 2
1
1
)
( ) ( ) ln lnN N N N
S S S k N N N
+ + = = +
1 2 1 2
1 2 2
1 1
o
.
( ) ln lnN N N N
S k N N N N
+ + = +
1 2 1 2
1 2
1 2
:)
8/21/2019 Pathria Statistical Mechanics persian solution
19/210
.
ln ln ( ) lnN N
N N N NN N
+ +1 2 1 2
1 2
2
ln ln lnN NN N
N N N N+ 1 2
1 2
2
N m N=1
.
:
( )m N N N N m N = + = 1 1 2 2 1
1
( )ln ln ln
ln ln ln( ) ln ln
m mm
m m m
mm m m
m m m m
+
+ +
1 12
1
1 1 11 2
1
ln( ) ( ) ln
( ) ( ) ln
m
m
mm
m
mm
m
1
1
1 21
1 21
( )
mm
m
m
m 1
21
=m .2
m k=
.
k+1
.
( )
( ) ( )
k kk k
k k
k k
k k
++
+
1
1
1
12 2
1
8/21/2019 Pathria Statistical Mechanics persian solution
20/210
:
TS.
ln ln : ,i ii i i i
m k TS N k V N k i
h
= + + =
2
3 21 1 2
2
ln ln iT i i
i
m k TS N k V N k
h
=
= + +
2
21
231
2
ln ln ln
ln ln ln
ln ln
m k TS N k V N k V N k N k N k
h
m k TN k N k V N k V N k N k
h
m k T m k T N k N k
h h
= + + + +
+ + + +
+ +
1
1 2 1 2 1 2
2
2 1 1 2 2 1 22
1 1 2 2
1 22 2
23 3 3
2 2 2
23 3 3
2 2 2
2 23 3
2 2
:
ln ln ln lnV V V V T T
S k N N N k N k V V T T
= + + +
1 2 1 2
1 2 1 2
1 2 1 2
3 3
2 2
.
P V N k T
PV N k T
P V N k T
=
= =
1 1 1 1
2 2 2 2
( )TS S S S = +1 2
8/21/2019 Pathria Statistical Mechanics persian solution
21/210
.
,
P V P V PV N k T N k T N k T
N T N TT N N N
N
+ = + =
+= = +
1 1 2 2 1 1 2 2
1 1 2 2
1 2
-
3
5
( )PS( )VS 3 o o4o o
.
:
d Q
dS dT= d Q PdV du
S T T
+
= =
P
du nC d T =.
.du nR dT =5
2
du nR dT =3
2
( )
( )PP
VV
S nC
S nC
= =
5
3
( )
( )
ln
ln
tf fV VV ti
i
tf fp PP ti
i
Tdu dT S nC nC T T T
Tdu dT S nC nC
T T T
= = =
= = =
8/21/2019 Pathria Statistical Mechanics persian solution
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( )
( )
ln ln
ln ln
P
V
S R R
S R R
= =
= =
5 4 5 41
2 3 2 3
3 4 3 41
2 3 2 3
oo
oo
oo
o
-P V
constPV =
.
1
f2
f, 2 1
f f= +
1 2
1 1
1
1 1 1.
:
d Q= o ' , ,dS PV cte f f = = + =1 2 1o
12n
1)(
n2
)(
' t t t t f f f f
V Vt t t t i i i i
n R T n R T dT dT S n C dV n C dV
T V T V = + + + = 1 1 2 21 11 1
1 2
o
( ) ( )ln lnf fV Vi i
BA
dQ u PdV S T T
T Vn C n C n R n R
T V
+ = =
+ + + =
1 2 1 21 2o
14424431442443
8/21/2019 Pathria Statistical Mechanics persian solution
23/210
.
ln ln ln
B A
f f
i i
V T
V T
+ =
1
B A
B A B Af f
f f i ii i
V T
V T V T V T
= = 1
n R n RA B
B A nC n CV Vf i i i
i f f f
T V V V
T V V V
+ + = = =
11 2
21 2
, ,V T cte PV cte PV N k T = = =1
V V
V V
nC n C n R n RnC n C n R n R
++ = =+ +
21 2 1 2
1
2 1 1 21 2
111
V V V V
P V P V
C C C C n nf f
n n n nR R C C C C
f f
= + = +
+ + + +1 1 2 2 1 2
1 21 2 1 2
1 1 2 1
1 2
1
1
P P
V V
f f f f
C C
C C
= + = +
1 2 1 2
1 21 2
1 2
1 11 1
- ST
PV =
NV
PV
T
=
.
:
8/21/2019 Pathria Statistical Mechanics persian solution
24/210
G E T S PV N
dE T dS S dT PdV V dP dN N d
= + =
+ + = +
dE T dS PdV dN V dP S dT N d = + = + )(
dPPT.
T
P PdP dT d
T
= +
)(
)(
V
)(
.
T
P PV dT V d S dT N d
T
+ = +
T
PS V
T
PN V
=
=
8/21/2019 Pathria Statistical Mechanics persian solution
25/210
- :
( )N
i ii
d dq dp=
= 3
1
( , )q p
) , )Q p.
:(
.
iQ
i
q
.
:
.
) , )i i
q p:
,i i
i i
H Hq p
p q
= =
& &
)(
) , )i i
q p
) , )i i
Q P )(
8/21/2019 Pathria Statistical Mechanics persian solution
26/210
) , )i i
Q P
.
i i i ii j j
j j j j i j
Q Q Q H Q H Q q p
q p q p p q
= + =
& & &
.
( , )
( , )
j j
j j
q q Q P
p p Q P
=
=
:
,
j j
i j i j j
j ji ii
i j i i i
p qH H H
P p P q P
p qH Q Q
Q P q P p P
= +
= = =
&
i
p&i
H
Q
:
,j ji i
j i j i
P qP P
q Q p Q
= =
.
, ,i i i m i
q p i m += = 3 3
,i i ii m
H H H H
q p +
= = 3
8/21/2019 Pathria Statistical Mechanics persian solution
27/210
.
N
NN
Hq
q
p
Hp
p
=
1
1
2
3
1
3
3
1
1
1
1
1
1
1
1
&
& o o oo
o o o oo
o o o oo
& o o oo
o o oo
o o o oo
o o o oo
o o o o
J
N N6 6.
,N
N
HJ J
= =
3
3
1
1
o
o
N NJ
= = =
2
6 6
1 1 1
1 1 1
o o o
o o o
11
J J
J J J
= =
= = 1
1 1
1 1
o o%
o o
%
11
det ( )J= 1.
( )
( )
, ,... , `
, ,. .. ,
,. . . , , ,. . . ,
,. . . , , ,. . . ,
i N N N
i N N N
q q p p
Q Q P P
=
=
= =
1 2 6 1 3 1 3
1 1 6 1 3 1 3
8/21/2019 Pathria Statistical Mechanics persian solution
28/210
( ) , , ,. . . ,
= = =
1 6& &i i i i j
i
i j N
M.
M =& &
( ), , ,,i i
i j i j i jj j
M M M
= = =
%
,
,
j
i j i
H H HM J
H H HM M J M
= =
= =
&
%&%
:
M J M J=%
. . . . . .
. . . . . .
N
N N ii
N
N N ii
d dq dq dp dp d
d dQ dQ dP dP d
=
=
= =
= =
6
1 3 1 31
61
1 3 1 31
:=M
detd M d =1
M JM J=%:
( )det det detM J J=2
det detM M = =1 1
.
:
8/21/2019 Pathria Statistical Mechanics persian solution
29/210
.
:
,q Q q Q 2 2 1 1
( )
( )
i i
i i
q q Q
Q Q q
=
=
&
( ), ,ji i ij i
PqP P p
p Q
= = =
o o
det
i i
N N j j
i i i ji i
i i
j j
q q
Q Pdq dp dQ dP
p p
Q P
= =
=
3 3
1 1
Ni i
j ji j j
q pd Q d P
Q P=
=
3
1
:
j i
i j
p q
P Q
=
i
j i
j
q
Q p
P
=
1
N Ni
i i j ji i j i
j
qdq dp dQ dP
Q q
Q
= =
=
3 3
1 1
1
8/21/2019 Pathria Statistical Mechanics persian solution
30/210
N N
i i j ji j
dq dp dQ dP= =
= 3 3
1 1
-
.h
.
:
IELI
LE
I
LH 2
22
22
===
h
=
=
o
o
.
IE
IEdld dl d IE
= = =
2
2 4 2
IE
IE
8
24 22
h
ho
=
=
= ()
:
( )l lLEI I
+= =22
1
2 2
h )(
:)()(
( )l l
+ =2
14
h =o
.
.
8/21/2019 Pathria Statistical Mechanics persian solution
31/210
.
( ) ( )l l ll
E E l l l lI I
= = + = 2 2
1 1 1
2
h h
:
( )
I
llE
I
LH
2
1
2
22h+
==
E H E
+2 2
.
LE E
I
I E L I E
+
+
2
2
2 2 2
2 22 2
( )L
L dl d L L I E I E
= = = +
2 2 11
2 2 2 22 2
/ /
IE EE E
= +
8/21/2019 Pathria Statistical Mechanics persian solution
32/210
-
)M )
M 2
h
.
( )jM j j= +1 h , , ,. . .1 3 5
2 2 2
, , ,. . .j= 1 2o
:.
+= 2
2
22
sin
PPM.
:
.
sin ,r
V V V V r r r r
= + + = + + =2 2 2 2 2 2 2 2 2 2&& & & o
M L I= =
sin
ppV r M L I I
I I
= = = = +
222 2 2 2 2 2 2 2
2 2 2
sin sin
p ppM p
M M
= + + =
2 222 2
2 2 2 2 1
.
p
p
:.
( )sin
H I L
H I
= =
= +
2
2 2 2
1
2
1
2
& &
8/21/2019 Pathria Statistical Mechanics persian solution
33/210
.
pLp I
I
= = =
& &
&
sinsin
pLp I
I
= = =
2
2& &
&
sin
ppH I
I I
= +
22
2 2 2
1
2
:
d d dp dph
= 2
2
1
o o
( )sindp dp M M = .
( )sin M
M M d Mh h
= = =
22 2 2
2 2
2 22
o h
( )jM j j= +1 h
j
j+2 1
.
( ) . . . . . . .j M
j M
A j M=
== + = + + + 2 1 1 2
-
&ml2
A.
E
T
.
:
T m gl = 2 21
2
&
8/21/2019 Pathria Statistical Mechanics persian solution
34/210
( cos )V m gh m gl m gl = = =
8/21/2019 Pathria Statistical Mechanics persian solution
35/210
.
--
NE .
.
nE n n , , ,
= + =
11 2
2h o
-
.
o
N
h.
:
:
( )h2111
/+= nE :
( )h2122 /+= nE
N
:
( )/N NE n = +1 2 h
( )
( )
N N
N
NE E E E n n n
E Nn n n
+ + + = = + + + +
+ ++ =
1 2 1 2
1 2
2
2
h h
h
E NR
=
2h
Rh.
R
N
)
(
.
:
8/21/2019 Pathria Statistical Mechanics persian solution
36/210
( )( )
!
! !
R N
R N
+ =
1
1
E
N>> hR>>N.
( )
( )
!
!
N
N
R
N
E
ER
N
=
=
1
1
1
1
h
h
N-
.
. . . . . . .
N Nn n
d q d p E E
E H E
= +
:
NNE N N E N
E E
+ + =
12 21 1
2 2
= h
:
= o
( ) !
NN
N
E N
E
N
=
1
1
2
1
1
o
h
h
8/21/2019 Pathria Statistical Mechanics persian solution
37/210
.
( ) ( )! !N N NN N N h = =1 2
o h
!N.
-.
. . . ( .. . )N
N
ii
dx dx dx
x R=
1 2 3
3
1
o
pc=N3 .
E
Nh = 3
o
-
-
.
:
n nn n n nV C R dV nC R dR
= = 1
xe dx = 1o
n
. . . . .
nx ni Ri
ii
e dx e dV
== =
1
1 1
,n
i iii
x R dx dV=
= = 1
8/21/2019 Pathria Statistical Mechanics persian solution
38/210
( )R n R nn n ne nC R dR nC e R dR nC n = = = 1 1 1 1
( ) !nC
n n n= =
1 1
!
n
n
RV
n=
.N3
( )!
N
N
RV
N=
3
33
Rhypershell )(.
( ) !
N
N
RS
N
=
3 1
33 1
E
N3
:
( ) !
NR
N
=
3 1
3 1
ER
pc.pc=
8/21/2019 Pathria Statistical Mechanics persian solution
39/210
-()--( ))--)--(.
) )--()--(
.)--()--(
:
(
lnr r
rr
n
=
= 1
)--
(
{ }{ }
{ }{ }
'
'
r rn r
r r r
r r rn
r
n W n
nW n
= =
2
2 1 )--
(
( ) lnr r r r r r
r r r
n n n
= =
2
2 2 2 1
8/21/2019 Pathria Statistical Mechanics persian solution
40/210
r rr r
r r
= +
2
2
2
r rr
r r r
= +
22
2 2
1
rrr
r
r r
r rr
r r r r
= +
= +
2
2 2
)
ln
rr r r
r r r r
= =
)-
-(
,lnr r
r r all s
=
= 1
:)--(
( )
( ),
exp
exp
r r rr
r rr all s
E E
UE
=
=
1
8/21/2019 Pathria Statistical Mechanics persian solution
41/210
.
( )( )
( )
( ),,
expexp
exp exp
r r rr r r
r r r r r r r rs all s
E EE EU
E E
= =
= =
2
1 1
o
( ) ( )
( )
( )
( ),
,
exp exp exp
expexp
r r r r r rr r
rr rrr r all s
r all s
E E E E
EE
==
+
2
2
1
1
( ),,
(*)r rr r
r rU all sall s
n nE E U U
==
+ =
2 2
11
o
, =
=
2 2
1
r r
r rall s
E U n
E U
.)--(
( )( )
( )( )
( )
( )
( ) ( )
( )
exp exp
exp exp
exp expexp
exp exp
r r r r rr
r r r r r Ur r
r r r r r r r r
r Ur r r r
r r
E E En
E E
E E EE
E E
=
+
2
2 2
( )
( )
exp
exp
r r rr
r
r r r Ur
E E
UE
+ +
8/21/2019 Pathria Statistical Mechanics persian solution
42/210
( )
( )
exp
exp
r r rr
r
r r r Ur
E E
UE
+ +
( )
( )
( )
( )
( ) ( )
( )
expexp
exp exp
exp exp
exp
r r rr rr
rr r r r Ur r
r r rr
r r
r
E EE E
E E
E E
E
+ +
+
2
2
( )
( ),
exp
exp
r r rr
r
r r r r r U Ur
all s
E EU
E
=
+
2
1
( )r r r r r
r
r rU U
n n n n nE U
= +
22
r rr r
r r r r U U U U
n nE E U U
+ +
2
2 2
8/21/2019 Pathria Statistical Mechanics persian solution
43/210
.
r rr r
r r rU U U
n nE U E U
= +
2 2
r r r r r
r rU U
n n n n
E U
+ +
2
((a*[...].
( ),
( )r r r r
r
r U all s
n n n nU E
=
= +
22
1
( )( )
( )
( )
rr r rr
r
rr r r
r
U En n nU EE U
U En n n
U E
= +
= +
2 2
2
2
1
1
)--
(
( )r r r r U E E U E U E U = + = 2 2 2 2 2
2
- )( oxg )--(
( ) )exp(UE .22
)--(
.)--(
:
8/21/2019 Pathria Statistical Mechanics persian solution
44/210
( ) ( )
( )f x U U
g xf x x
2
2
o
o
o o
)--
(
( ) ( )
E Er r
r r rr rf z z f z E z
= =
1
( ) ( ) Err r rr
f z E E z = 21
( )( ) Err r r
rEr
rr
E E xU U
g xxx
=
22
2
1o
o
oo
&( )expx = o
( ) ( ) ( )Er
r r rr
Err
r
E E e U Ug x
ee
=
2
2
2
1o
( )E Er r
r r rrr rE Er r
r rr r
E e e E e e
e U Ue e
=
2 2 2
2 2
( )e E E U U e E U + = 2 2 2 2 2 2
e E U U e E U U E = + = +
2 22 2 2 2 22 2
( )re E EU U e E U + =
22 2 2 22
E U=
.
8/21/2019 Pathria Statistical Mechanics persian solution
45/210
.
-
(N,V,T)A:
, ,
+ =
V T N T
A AN V A
N V
]
GPVAN +=.[
:
( ) ( ), , ln ,NA N V T k T Q V T=
T
.
, ,V T N T
A AdA dN dV
N V
= +
, ,V T N T
A AdA dN dV
N V
= +
, ,V T N T
A AA N V A N PV N A PV G
N V
= + = = +
,N T
AP
V
=
:
,V T
A
N
=
:
:
,( ) ,. . .x x1 2n
:
8/21/2019 Pathria Statistical Mechanics persian solution
46/210
ii i
fx nf
x
=
A:
( ) ( ), , , ,A N V T A N V T =
A.
:
, , ,V T N T V T
A A AN A
N V T
+ + =
T C onst =.
, ,V T N T
A AA N
N V
= +
-
(
.)--(
.)
)E(
)exp )r r
P E .
.E)
)E(
)
N(
)exp ) r r r
p N E ,
.,EN
:
)
8/21/2019 Pathria Statistical Mechanics persian solution
47/210
.
lnr r
SP P
k= )--
(
:
( )
ln
ln ln
r r
rr r r r r
r rr
S k P P
PS k P P P k P P
P
=
= + = + =
1 o
rP
r
P
rP 1
.
r rr r
P P= = 1 o
(ln )r r r
r r
S k P P P
= == + = 1
o o
o
:
( ) ( )ln lnr r r r r r r r
P P P P P
= = =+ + = + + = 1 1
o o o
o o
( ) ( ) ( )ln ,r r r r r r
P P e P e P
+ +
= == + = = = =
1 1
11 1 1
o o
(
,r r r r r r r
r
E P E E P E P P = = = = 1o o
( )ln
r r
r r r r r
P P
P P P E P
= =
+ + + =
1
o o
o
8/21/2019 Pathria Statistical Mechanics persian solution
48/210
( ) ( )ln lnr r r r r P E P P E + + + = = + 1 1o
( ) E Er rr r
P e e P e + = 1
:)
r rP P = = 1 o
r r r r E E P E P = = o
r r r r N N P N P = = o
( )ln r r r r P E N P + + + + = 1 o
( ) N E N E r r r r r rP e e P e
+
=
1
-:
T VP V
T
ln QT
T VC C k
ln Q
V
= >
2
2
2
o
Nk
.
:
, ,
,V P
V N V P N P
d Q S d Q S C T C T
dT T dT T
= = = =
8/21/2019 Pathria Statistical Mechanics persian solution
49/210
.
V T
P V T P
S SdS dT dV
T V
S S S V T T T
T T V T
= +
= +
P VT P
S VC C T
V T
=
:
T V
S P
V T
=
P V
V p
P VC C T
T T
=
,( ) ,x y z = o:
y x z
z y x
x z y
= 1
P VV p
P VC C T
T T
=
2
, ,ln , ln
N T N T
PP k T Q k T QV V V
= =
2
2
P T V
V V P
T P T
=
P VV T T V T
V P P V PC C T T
P T V P T
= =
2 2 2
8/21/2019 Pathria Statistical Mechanics persian solution
50/210
V T V T
P P P PT T
T V T V
= =
2 1 2 1
ln
lnln
Pk T QT V
T VT
Qkk T Q
V V
= =
22
2 2
2 2
1
:
ln
lnP V
Qk T
T VC C
Q
V
= >
2
2
2
o
( )!
N
NVQ m k T
N h =
3
23
1 2
( )ln ln ! ln ln ln lnNQ N N V h m k T = + + +
3 3 32
2 2
ln ln,N N
Q QN NT
V V V V
= =
ln ln,N N
Q QN NT
T V V V V = =
2
2 2
P V
Nk
VC C k N N
V
= = >
2
2
o
-:
8/21/2019 Pathria Statistical Mechanics persian solution
51/210
.
ln lnP
QST Q
N k N T
= + 1
1
:
( , ) , ln
!
N
N NQ Q N T A k T Q
N
= = 11
( )
( )
,
ln ,
ln ln !
NN V V
N
V
AS k T Q V T
T T
k T Q N T
= =
= 1
( )ln ln lnV V
Qk T N Q N N N N k T T T T N
= + = + 1
1
ln ln ln lnVV
Q Q QST T Q
N k N T N N T
= + + = + + 1 1 1
11 1
ln ln ln
ln ln ln
pp V T
pV p T
Q Q Q V
T T V T
Q Q Q V
T T V T
= +
=
1 1 1
1 1 1
ln !ln ln ln ! ln
N
A NA k T Q k T N Q k T N N Q
N k T N
= = + = +
1 1
8/21/2019 Pathria Statistical Mechanics persian solution
52/210
ln ln !
TT
Q A N P
V N k T V V N N k T V
= + = = 1
1 1
P
V N kPV N k T
T P
= =
ln ln ln
V P P
Q Q QN k TT T T
T T PV T
= = 1 1 1 1
lnln
P
Q QST
N k N T
= + 1 1
-)
(
i
f
P
P
.
:
)
ln ( )
V m k T
S N k N h
= +
3
2
2
2 5
2
f id Q T dS d Q S S = = =o
ln ( ) ln ( )i i f f V m k T V m k T
N k N kN h N h
+ = +
3 3
2 2
2 2
2 5 2 5
2 2
8/21/2019 Pathria Statistical Mechanics persian solution
53/210
.
( ) ( )i i f f i i i f f f
V T V T V P V V P T = =3 3 3 3
2 2 2 2
). )PV N k T =.
i i f f P V P V =
5 5
3 3
PV const
:=
=5
3
( ) ( )f i if i
i f i
P V VV V
P V V
= = = =
5 5 5
3 3 32 22
)
f i
dQ dQdQ T dS S S S
T T= = =
ln ( ) ln
( ) ( ) exp
f f f f
i i i i
f f
i i
V T V P dQN k N k
TV T V P
V P dQ
V P N k T
= =
=
3 5 3
2 2 2
3 5 3
2 2 2
5 3
2 2 1
( ) exp( ) ( )f i f
i f i
P V dQ P
P V N k T P=
53
2
3
( )f
i
P
P
dQ= o)(.
8/21/2019 Pathria Statistical Mechanics persian solution
54/210
-V:
{ ( )}/
==
3
1
NU u qN
i
i N Ti
V e d q
U
( )iu q
.
+
=2
52 23
2
/
h
mkT
N
VlnNkS
V*
.
:
( )N
iim
i
PH u q U
== +
23
1 2
!
exp ( )!
NH
N i iNi
iiN
i
Q e d P d qN h
PU q U
N h m
==
= +
3 3
31
2
3
1
1
2
N N
i ii i
d P d q= =
3 31 1
8/21/2019 Pathria Statistical Mechanics persian solution
55/210
.
( )
! !
!
NPN Ni PNm m k Ti
N iN Ni
NN
N
V VQ e d P e P dP
N h N h
V m k TN h
=
= =
=
22
3 22 2
3 31
3
23
4
2
,
ln ln
ln
N
N V
V m k T A k T Q k T N
N h
A V m k TS N k
T N h
= =
= = +
3
2
2
3
2
2
21
2 5
2
-
N1
m1
N2
m2
TV
.
21 NN +
m
221121 NmNmNNm +=+ )(.
:
)
( ), ,N N
H
NQ V T e d q d P N N N = + =
3 3
1 2
N Ni i
i i
P PH
m m= == +
2 21 2
1 11 2
2 2
8/21/2019 Pathria Statistical Mechanics persian solution
56/210
( )/
!
N
N
VQ m k T
N h
=
13 2
1311
12
( )/
!
N
N
VQ m k T
N h
=
23 2
232
2
12
( )( ) ( )/ /
! !
N NN N
tot N N N N
VQ Q Q m k T m k T
N N h
+
+= =
1 23 2 3 21 2
1 231 2 1 21 2
12 2
( ) ( )/ /
! !
NN N
tot N
VQ Q m k T m k T
h N N = =
3 2 3 21 2
1 23
1 2
2 2
ln ln ln
ln ln
N
A k T Q N k T V N k T h
k T N N k T N k T N N k T N
= = +
+ + 1 1 1 2 2 2
3
( ) ( )ln lnN N
k T m k T k T m k T 1 21 2
3 32 2
2 2
( ) ( )
ln ln ln ln
ln ln
k T N V N k T h k T N N k T N k T N N
N Nk T m k T k T m k T
= + + +
1 1 2 2
1 21 2
3
3 32 22 2
,N T
A k T NP
V V
= =
( )P V N k T P V N N k T = = +1 2
8/21/2019 Pathria Statistical Mechanics persian solution
57/210
.
( ) ( )
,
ln ln ln
ln ln
N V
AS N k h N k N k N k N N
T
N N N Nk m k T k T k m k T k T
T T
= = + +
1 1 2 2
1 1 2 2
1 2
3
3 3 3 31 12 2
2 2 2 2
( ) ( )
ln ln ln
ln ln
S N k h N k N N k N k N
N NN k N k k m k T k m k T
= + +
+ + +
1 1 2 2
1 2
1 2 1 2
3
3 33 32 2
2 2 2 2
ln ln ln ln
ln( ) ln( )
U A T S k T N V N k T h N k T N k T N N k T N
N k T m k T N k T m k T
= + = + + +
+
1 1 2 2
1 1 2 2
3
3 32 22 2
ln ln ln
ln( ) ln( ) ( )
T N k h N k N N k N k N N k N k
N k m k T N k m k T N N k
U N k T
+ + + +
+ + = +
=
1 1 2 2 1 2
1 1 2 2 1 2
3 33
2 2
3 3 32 2
2 2 2
32
(
( )( )
( ),!
N N
N N
VQ V T mkT
N N h
+
+
= +
1 23
231 2
1 2
12
8/21/2019 Pathria Statistical Mechanics persian solution
58/210
( ) ( ) ( ) ( ), , ln , ln lnNV
A N V T kT Q V T kT N N kT mk Th
= = +
3
21 2 3
2
( ) ( ) ( ) ( ),
ln ! lnN V
A VS k N N N N k mkT N N k
T h
= = + + + + +
3
21 2 1 2 1 23
32
2
( ) ( ),N T
A kTP N N PV N N kT
V V
= = + = + 1 2 1 2
( ) ( ) ( ) ( )ln ln V
A kT N N N N N N N N kT mk Th
N N N
= + + +
+ =
3
21 2 1 2 1 2 1 2 3
1 2
2
( ) ( ),
ln lnV T
A VkT N N kT mkT
N h
= = +
3
21 2 3
2
( ) ( ),N V
AU T N N kT U N N kT
T T T
= = + = + 2 2
1 2 1 2
3 3
2 2
PT
U
T
( )N N+1 2
.
( ) ( ) ( )
( ) ( ) ( )
,
ln ln
ln
N V
AS k N V k N N N N k N N
T
k N N m k T k T N N T
= = + + + +
+ + + +
1 2 1 2 1 2
1 2 1 2
3 3 12
2 2
( ) ( ) ( )ln lnS k N V k N N N N k N N = + + + +1 2 1 2 1 2
8/21/2019 Pathria Statistical Mechanics persian solution
59/210
.
( ) ( ) ( )lnk N N m k T k N N + + + +1 2 1 23 3
22 2
( ) ( )
( ) ( ) ( ) [
ln ln
ln ln
U A S T k T N V kT N N N N
k T N N k T N N m k T T k N V
= + = + +
+ + +
1 2 1 2
1 2 1 2
32
2
( ) ( ) ( ) ( ) ( )
( )
ln lnk N N N N k N N k N N m k T
k T N N
+ + + + + + +
+ +
1 2 1 2 1 2 1 2
1 2
32
2
3
2
( )U k T N N U N k = + =1 23 32 2
,V P
.( )N N+1 2.,S A
-),( TVQN
N
pc=c.
N
N
kTQ (V,T) V
N! hc
=
31
8
:
8/21/2019 Pathria Statistical Mechanics persian solution
60/210
VPV U , kT
N= = =
1 43
3 3
)--(
)(Eg
.
:
( ) ( ), ,!
c P NN ii
i N i iNi i
H cp Q V T e d q d PN h
= == = 3 33
1 1
1
o
( ),! !
N NN NcP pc
N N N
V VQ V T e P dP e P dP
N h N h
= =
2 2
3 34 4
o o
( ) ( )
( )
cP cP cd de P dP e dP ecd c d c
d
c cd c
= =
= =
2 2
2
2 2
2
2 3 3
1
1 2
o o
o
( ),! !
NNN
N N
V k T k T Q V T V
N h c N hc
= =
33 3
3 3
18 8
( )
ln ln ! ln
ln ln
N
k TA k T Q k T N k T N V
hc
k Tk T N N N N k T V
hc
= =
=
3
3
8
8
8/21/2019 Pathria Statistical Mechanics persian solution
61/210
.
,
ln ! lnN V
A k TS k N N k V N k
T hc
= = + +
3
8 3
, ln lnV T
A k T
k T N k T V N hc
= =
3
8
,N V
AU T T k N N k T U N k T
T T T
= = = = 2 2 3
3 3
,
,V
N T V
A UP k T N PV N k T U C N k
V V T
= = = = = =
1 13
3
( )P
P
P
V
E PVC U U N k T N k
T T T
C
C
+ = = + = =
= =
1 43 4
3 3
4
3
-
N3
:
N
N
kTQ (L,T) L
( N)! hc
=
3
3
12
3
L
.
:
8/21/2019 Pathria Statistical Mechanics persian solution
62/210
N3
.
N
ii
H cP=
= 3
1
( ) ( )
( )
, !
!
Nc P Ni
i
N i iN i
NL cp
N
Q V T e dq dPN h
dq e dPN h
=
=
=
=
33
1
3 3 1
3
3
1
3
1
3 o
( ) ( ) ( )
( )
! !
!
NN NNcP cP
N N
NN
N
L Le dP e
N h N h c
L k TN h c
= =
=
3
3 33
3 3
33
3
22
3 3
23
o o
( )( )
,!
N
N
k TQ V T L
N ch
=
3
3
12
3
( )ln ln lnNk T
A k T Q k T N N N N k T Lch
= = 3 3 3 3 2
( ),
ln ! lnN V
A k TS k N N k L N k
T ch
= = + + 3 3 2 3
( ),
ln lnV T
A k Tk T N k T L
N ch
= = 3 3 2
8/21/2019 Pathria Statistical Mechanics persian solution
63/210
.
,N V
AU T N k T N k T
T T T
= = = 2 2 1
3 3
,N T
A N k TP PV N k T U
V V
= = = =
33
-)--(( , )f p q[ ]U H(p,q)
f = o:
[ ] o= d))q,p(Hexp()q,p(HU
)--(
.
:( ) ( )
( ), exp
exp
f q p H df
H d
=
)-
-(
f U H f U H= = = o
( ) ( ), expU H q p H d = o
( ) vU U
E E E k T k T CT
= = = =
22 2 2 2 )-
-(
:
E E
E E
E e d Ee dE E
e d e d
=
22
22
8/21/2019 Pathria Statistical Mechanics persian solution
64/210
E E E
E E E
Ee d E e d Ee dUU
e d e d e d
= = +
22
( )
UE
=
2
( ) ( )H HU H e d U H e d
= = o o
( )H H HU H
e d e d U H H e d
HH H
H H H
Ue d
UHe d H e d e d e d e d
+ =
2
o
U UUH H U H H
+ = + =
2 2
o
UE E
=
22
-:
vv
v
( ) = +
3 2 4 32
CE k T T C
T
:
8/21/2019 Pathria Statistical Mechanics persian solution
65/210
.
( ) , = =
3
2
2
2 8
3 9
E E
U N U N
:
( ) ( )E E E E E E E E E
E E E E
= = +
= +
2 33 3 3 2
33 2
3 3
3 2
E E E
E E E
Ee dE E e d Ee dUU
e dE e d e d
= = +
2
U U =
2
2
( )
E E E
EE
E E E E
E E E E
E e d E e d Ee dU
e d e d
Ee d E e d Ee d Ee d
e d e d e d e d
=
+
3 22
22
22
2 2
E E E E E E E= + 2 2 23
2 2
( )U
E E E E E
= + =
233 2 3
2 3 2
:
Tk T
T k T k T T
= = = =
2
2
1 1
8/21/2019 Pathria Statistical Mechanics persian solution
66/210
k T k T k T k T k T T T T T
= =
2 2
2 2 2 2
2 22
k T k T TT
= +
2
2 4 2 3
2 2
( )VV
VV
U U UE k T k T
T T
Ck T T C
T
= = +
= +
2 23 2 4 2 3
2 2
2 4 3
2
2
VV
UC T
=
:
VV
UU N k T C N k
T
= = =
3 3
2 2
( )
( )
VE k T C N k T
N k TE E
U U NN k T
= =
= = =
2 2 2 2
2 22 2
22
3
2
3
22
33
2
8/21/2019 Pathria Statistical Mechanics persian solution
67/210
.
( ) V
V
CE k T T N k N k T
T
E N k T N k T
U N k T N N T
= + =
= = =
3 2 4 3 3 3
3 3 3 3 3
3 3 3 2
32 3
2
3 3 8 8
27 93
2
- ((long time averagedG
dt
i i
i
G p q= )--(
.)--(
:
i iG q p=
[ ],dG G
G Hdt t
= +
[ ],dG G
G Hdt t
= +
GG
t
=
o
( )long timeaverage
:
[ ], i ii i ii i i i i i
G H G H H H G H p q
q p p q p p
= = =
o o
i ii ii i
H Hif p N K T q N K T
p p
= =
3 3
8/21/2019 Pathria Statistical Mechanics persian solution
68/210
-
( )U r ( )U r
)n(
:
nUPV+= 3
:K
( ) ( )nEPV)n(
nUPVK ++
=+== 32
13
2
1
2
1
U
UKE .=+
.
:
( ) n nU
U r A r nA r r
= =
1
( )i ii
pH U r
m
= +
2
2
( ) = = +
& ii i i i ii i i i
U rq F q p q
r
= = 13 3n ni i ii i
N K T nr A r N K T n A r
.
ni
i
U A r=
:
8/21/2019 Pathria Statistical Mechanics persian solution
69/210
.
= 3N K T nU
:
= = =
3 2ii i
Hq N K T K
q
K
.
= 1
2K
( ) ( )( )
( )( )
= = + = +
= ++
1 1 13 3
2 2 2
13
2
K pV nU pV n E K
K pV nE n
-(
) )n= +2.
)) )n= 1)()(
.
(
.
:
,p
K K m qm
= =2
2 21
2 2
sin( )q A t=
8/21/2019 Pathria Statistical Mechanics persian solution
70/210
cos( )p m A t=
cosTm A m A
K t dt m T m
= =
2 2 2 2 2 221
2 4o
K m A= 2 214
sin ( )T
U m A t dt m AT
= =2 2 2 2 21 1 1
2 4o
( )K pV nU = +1
32
pV m A m A pV + = =
2 2 2 21 1 13 2
2 4 4
o
=p o.
-
.
:
F k x
U k x
=
=
3
41
4
:
pH m x k x k x
m= + = +
22 4 41 1 1
2 4 2 4&
8/21/2019 Pathria Statistical Mechanics persian solution
71/210
.
( )ii i
HK x x k x k x U
x
= = = = =
3 41 1 1 1
22 2 2 2
-s:
( ) , , ,. . .i
sE j j= + = 1 2
2h o
j
( )!
!( )!
j s
j s
+
1
1.
N
.
sN.
:
s s
r rr r
sE n n
= =
= + = +
1 1
1
2 2h h
:
s
rr
n j=
=1
s
s
nr j .
.
,...,; .. .
j n n ss
s sE j E n n
= + = + + +
112 2h h
8/21/2019 Pathria Statistical Mechanics persian solution
72/210
x y z
n n n j+ + = , ,x y z
n n n
j
s'
j
s1 's
.
( )( )
( )( )
'! !
! ! ! !
j s j sj s j s
j j s j j sj j
+ + + + = = = +
11 1
1 1
:
( )'
j
j s sg E E j
j
=
+ = +
1
2oh
( )( )
!
! !
s
j
j
j se e
j s
=
+ =
2
1
1
hh
o
( ) ( )
( )( )
,
!
! !
sj
E
ij
s
j
j
Q s e g E dE g e
j se e
j s
+
=
=
= =
+ =
2
1
2 1
1
h
oo
hh
o
( ) ( ),s
Q s e e
= 2
1 1
h
h
( )( )
e
es
Q
=
1
2
1
1
h
h
8/21/2019 Pathria Statistical Mechanics persian solution
73/210
.
( )e esN N s
NQ sN
= =
1
2 12
hh h
( )
( )
ln ln e
ln e
NA k T Q k T sN k T N s
sN sN k T
= = +
= +
11
2
12
h
h
h
h
( ),
lnV T
A ssk T e
N
= = +
12
hh
( ) ( )( )
,
,
ln
N T
N T
AP
N
A k eS sN k e sN k T
T e
= =
= = + 1
1
h
h
h
o
h
( )( )
ln e
S sN k e sN k e
=
1
1
h
h
hh
sN
.
( )( )
exp
exp
=
1
1
2
1
h
hQ
)--
(
( )( )
exp
expsN sN
sN
Q
=
2
1
h
h
8/21/2019 Pathria Statistical Mechanics persian solution
74/210
N
s sN
.
- ln ( )g EN
))--)--(
:
( ) ln( ) ( ) ln( )S E E E E
N k N N N N = + +
1 1 1 1
2 2 2 2h h h h
.:
:
{ }N
N
NQ e e
= 2 1h
h
( ) ( )'
'
'i
E
i
g E e Q d i
+
= >
1
2o
( ) { }'
'
Ni NE
i
g E e e e d A
i
+
= = 21
1
2
hh
( )
EN
N
EN
N
E
Ng E
E
N
+
+ =
1
2
1
2
1
2
1
2
h
h
h
h
8/21/2019 Pathria Statistical Mechanics persian solution
75/210
.
ln lnS E E E E
N k N N N N
= + +
1 1 1 1
2 2 2 2h h h h
-(NE
n
P
n.)))--(
nn
p
== 1
o
N)
E
):)exp .))--
.>>E1>>N
:
, , ,. . .
, , ,. . .
E n n
E n n
= + =
= + =
1 1 1
2 2 2
11 2
2
11 2
2
h o
h o
. . . . ..N
NE E E E n n n n
NR
= + + + = + + + + +
= +
1 2 1 1 2 32
2
h
hh
( )ln lnS k g E k A= =
8/21/2019 Pathria Statistical Mechanics persian solution
76/210
Rn .h
n
E n = +
1
2h
N1'E
.
' ,N N
n i ii i
N NE E E E n n R
= =
= = + = + = +
1 1
1
2 2 2
h hh h h
( ) ( )'E R N n R n N = + = + 1 1 1
12 2 2
h h h h h h
NE
:( )
( )!
! !
R N
R N
+ =
1
1
)(
N1'E:
)( :
,R R n N N 1
( ) ( )( ) ( )
!'
! !
R n N
R n N
+ =
1 1
1 1
( )( ) ( )
( )( )
!
! !'
!
! !
n
R n N
R n NP
R N
R N
+
= = +
2
2
1
1
8/21/2019 Pathria Statistical Mechanics persian solution
77/210
.
( ) ( )( ) ( ) ( )
( ) ( ) ( )( ) ( ) ( )
( ) ( ) ( ) ( )
( ) ( )
! ! ! ! ! ! !
! ! ! ! ! !
... ! !
! !
n
R N R n N R N N R n NP
R N R n N R N R n N
R R R n R n N N
R N R n
+ + = =
+
+ =
+
1 2 1 2 2
1 2 1 2
1 2 1
1
( ) ( ) ( )( )( )( ) ( ) ( )( )( )
. . . . . . !
... . . . .
R R R n R N n N
R N R N R N n R N
+ =
+ + + +
1 1 1 1 1
1 1 1 1 1 1 1 1
( ) ( ) ( )( ) ( )
. . . . . .
. . . . . .
R R R n N
R N R N n
+ =
+ +
1 1 1
1 1
,R n N>> :1
8/21/2019 Pathria Statistical Mechanics persian solution
78/210
:
f gk T
c c
+
2
2
2 3
3 5
2 4
q
.
gk Tq
c=
2
3
4
:
( )V q C q gq f q= 2 3 4
PH C q gq f q
m= +
2
2 3 4
2
( )v,
lnP
N V
C C k Q
= =
2
2
2
PCq g q f q
mQ e dpdq
h
+
=
22 3 4
21
( )Cq gq f qmQ e dq
h
=
2 3 4
2
2
,y nn
n
nI e y dy
+
+= =
2
1
2
1 1
2
o
n
n > 1
8/21/2019 Pathria Statistical Mechanics persian solution
79/210
.
( ) ( )Cqm
Q e gq f q g q f qh
= + + + + +
22
3 4 2 6 2 8
2
21
2L
m f g f Q
h c c c c
= + + + +
2 2
2 2 3 2 4
2 3 1 15 1 51
4 16 32
oL
( )v lnC k Q
=
2
2
2
( ) ( ) ( )k k c f c g c = + +
23 2 2 3 2
32 12 15 16
v
f c g f g
C k k k T c c c
+
= + = + +
2 2
2
3 2 3
12 15 3 5
1 8 2 4
g
.
:
( )
( )
exp exp
exp exp
Pdp cq
mq
Pdp cq
m
=
22
2
2
2
2
( )( )
gq f q qdq
gq f q dq
+ + + + + +
3 4
3 4
1
1
L
L
8/21/2019 Pathria Statistical Mechanics persian solution
80/210
( )expm
cq gq dqg k T
q gc cm
c
= = = 2 4
2 22
2
2
3 3
4 42
-:
( ) ( ) , , ,. . .n
E n x n n= + + =1 1
1 22 2
h o
x
)( 1
8/21/2019 Pathria Statistical Mechanics persian solution
81/210
.
expn
ux n u n
=
+ +
21 1
12 2o
exp expn nu n ux n u n
= =
= + + + +
21 1 1
2 2 2o o
exp expn n
u n x u u nu
= =
= + + +
2
2
1 1
2 2o o
exp
sinhnu n
u
=
+ =
1 1
22
2
o
sinh sinh
Q x uu uu
= +
2
1 2
1 1
2 22 2
cosh
sinh sinh
uxu
u uu
= +
2
1 2
22 2
2 2
sinh sinh cosh
sinh sinh
u u u
xuu u
+ = +
3 2
4
21 1 2 2 2
22
2 2
cosh
sinh sinh sinh
u
x uu u u
= + +
2
3
21 1 1 2
22
2 2 2
8/21/2019 Pathria Statistical Mechanics persian solution
82/210
cosh
sinh sinh sinh
N
N
u
Q x uu u u
= + +
2
3
21 1 1 2
22
2 2 2
cot
sinh
N
ux u gh
u
=
211 1 2
22
2
( )ln ln sinh ln cotNu
Q N u x u gh = +
22 1 1 2
2
vln ln
N NC k Q k Q
= =
2
2 2
2
lnN
u uk Q
u u
=
2
u = hu u u
u u u
+
2 2
2
u u
= =
h
( )v ln NC k Qu u
= +
222
2
hh
8/21/2019 Pathria Statistical Mechanics persian solution
83/210
.
ln
lnNN
Qku ku Q
u u
= +
2
2
2
cotcot
cosh sinhln
sinh cot
N
ugh
ux gh xu
u uQ
u uuxu gh
+
= +
2
2
2
21 2 4
22 2
1 1 22 2
( cot h )u
x ux g
8/21/2019 Pathria Statistical Mechanics persian solution
84/210
--
No,.
:
n
n
Q e e = = +1 1
( )NN
NQ Q e = = + 1 1
( )ln lnNA k T Q N k T e = = +1
( )
( )
,
,
ln
ln
V T
N V
AN k e
N
A NS N k e
T T e
= = +
= = + + +
1
11
-:
g-1
1
-
g 2
2
:
ln( ) ln( )P P
s k P Pg g
= +
1 2
1 2
1 2
8/21/2019 Pathria Statistical Mechanics persian solution
85/210
.
,P P2 1
:
P P+ =1 2
1
P)
:
ln ln ( )
( )
x
x
g xS k g e
gge
g
= + + + +
2
1
11
2
1
1
xk T
= 1 2
= =g g1 2
1
.
) S .
( oTlnS k g
1.
:
E1
E2
.
g1
g2
E1
E2
:
' , , ,. . .i
PP i
g= =1
1
1 2
' , , ,. . .j
PP j
g= =2
2
1 2
8/21/2019 Pathria Statistical Mechanics persian solution
86/210
i i j jP g P g + =1
lnr r
S k P P=
' ln ' ' ln 'g g
i i j ji j
S k P P k P P= =
= 1 2
1 1
:
{ }' ln ' ' ln '
ln ln
i i j jS k g P P k g P P
P P P Pk g g
g g g g
= +
= +
1 2
1 1 2 2
1 2
1 1 2 2
ln lnP PS k P Pg g
= +
1 21 2
1 2
( )
xE E
E ExE
ge
g e g e gP
gg e g e g eg e e E E gg
= = = + ++
2
1 1
1 1 1
1 1 221 2 21
1 2 11
1
11
( )
( )
E E x
E
E EE E x
g ge e
g e g gP
g gg e g e e eg g
= = =+ + + +
2 12 2
22 1 1
2 1 22 12 21 2
1 1
1 1 1
ln ln xg
P eg
= +
2
1
1
1
8/21/2019 Pathria Statistical Mechanics persian solution
87/210
.
n ln ln ln lnxP g
l P g e gg g
= = +
1 2
1 1 1
1 1
1
ln ln ln ln xg
P g g x eg
= +
2
2 2 1
1
1
ln ln ln xP g
g x eg g
= +
2 2
1
2 1
1
ln ln
ln ln
x
x
x
x
x
gS k g e
g ge
g
ge
g gg x e
g ge
g
= + +
+ + +
2
1
2 1
1
2
1 2
1
2 1
1
11
1
1
1
ln lnln
x x
x x x
g ge g e
gg g
S k g g ge e e
g g g
+
= + + +
2 2
1
11 1
2 2 2
1 1 1
1
1 1 1
lnx xx
x x
g gge ex e
g gg
g ge e
g g
+
+ +
2 22
1 11
2 2
1 1
1
1 1
8/21/2019 Pathria Statistical Mechanics persian solution
88/210
ln ln
x x x
x
x x x
g g ge e x e
g g g gS k g e
g g gge e eg g g
+ + = + + + +
2 2 2
1 2 1 1
12 2 21
1 1 1
1 1
1
1 1 1
ln ln
x
x
x x
gx e
g gS k g e
g g ge e
g g
+
= + + + +
2
2 1
1
1 2 1
1 2
1
1
ln ln x
x
g xS k g e
gg
eg
+
= + + +
+
2
111
2
1
1
if g g= =1 2
1
ln xx
g xS k e
g e
+
= + +
+
2
1
11
Ex
k T
= =
1 o
)-
(
.
8/21/2019 Pathria Statistical Mechanics persian solution
89/210
.
,E E EE xr
rr
gQ g e g e g e g e e x
g k T
= = + = + =
2 2 11 2 11 2 11
1
ln ln ln xg
Q g E e
g
= + +
1
1 1
2
1
lnA k T Q=
ln ln xg
A k T g E eg
= + +
1
1 1
2
1
,
lnln
N V
A QS k Q k T
T T
= = +
( )ln ln x
x
egQ Qk E
gT k T g eg
= = +
2 2 12
1221
1
1
1
( )ln ln
xx
x
eg g
S k g E e k T E gg k T g eg
= + + + +
2 11 2
1 1 1222 1
1
1
11
ln ln
x
x
x
gxe
g gS k g E e E
gg k T eg
= + + + +
2
2 1
1 1 121
1
11
1
8/21/2019 Pathria Statistical Mechanics persian solution
90/210
ln ln
x
x
x
gx e
g gS k g e
gg eg
= + + + +
2
2 1
121
1
1
1
ln ln x
x
g xS k g e
gg eg
+
= + + + +
2
121
1
1
1
.
.)
lnT S k g =1
o
-
N
:E
:
cossin
pppE
m I I
= + +
222
22 2 2
I
.
.
E k T
8/21/2019 Pathria Statistical Mechanics persian solution
91/210
.
:
cossin
cP PP
Em I I
= + +
2 22
22 2 2
E
.
exp exp PP
Q dq P dP dP d h m I
=
2222
1 5
14
2 2o o
co s si nsin
P
E Id e e dP
2
22
o
exp P
P dPm
2
24
2o
y n
nn
nI e y dy
+
+= =
2
1
2
1 1
2
o
expd P d
dPm
d dmm m
= =
2
14 2
2 2
22 2
m
=
3
22
exp P I
dPI
=
22
2
n > 1
n
8/21/2019 Pathria Statistical Mechanics persian solution
92/210
exp sinsin
P IdP
I
=
2
2
2
2
co s sin sin cos cosEd e d E E
= + +
2 2 2 2 2 211
2o o L
EE k T
k T
8/21/2019 Pathria Statistical Mechanics persian solution
93/210
.
sinE
Ak T N
E E
= = +
2 2
2 2 2
1
41
18
:
sink T N E
PV V
E
= = +
2 2
2 2 2141
8
xx
+1
11
:
, k T N k T N
P E P E E E V V
= = 2 2 2 2 2 2 21
14 8 4
:
N
VkT
=
2
4
N
V k T
= + = +
2
4o o
8/21/2019 Pathria Statistical Mechanics persian solution
94/210
-
:
:
,
,
N Er s
r s N Er s
r s
ePe
=
:ln
,,
ln ln N Er s
r s r sr s
P N E e
=
,
ln N Er s
r s
q e =
,ln r s r sP N E q =
,r s
P,s r
.
, , , , ,, , , ,
ln rr s r s r s r s s r sr s r s r s r s
P P P N P E q P =
( ), ,,
lnr s r s
r s
P P N E q N E q = = + +
8/21/2019 Pathria Statistical Mechanics persian solution
95/210
:)--(q
, ,,
lnr s r s
r s
S k P P=
-
:
V)o
V
:
( ), V
p VV
=1o
( )( )
( )( )
( )
!,
! !
N N N
N V VP N V
V VN N N
=
1
o
o
o
o o
V:
pV
Vq == 11
o
( )( )
,N
N
p N V=
= 1o
o
( )
( )
( )( )
( ) ( ) ( )
( )
( )
!
! !
N N NN
N
N N
Np p
N N N
p p
=
= + = =
1
1 1 1
o oo
o
o
o
8/21/2019 Pathria Statistical Mechanics persian solution
96/210
.
( )( )
( )
( ) ( )( )
( )
( ) ( )( )
( )
!,
! !
!
! !
NN N N
N
NN N N
N
NN N P N V N p q
N N N
Np p q
pN N N
=
=
= =
=
o oo
o
o
o o
o
oo
( ) ( )
( )
( ) ( ) ( )( )
( )
( )( ) ( )
!
! !
N NN N N
N
N
Np p q p p q
p pN N N
pN p q pN
=
= = +
= + =
1
o ooo
o
o
o
o o
(
( )( ) ( )
( )
!
! !
N N NNN N p qN N N
=
2 2o
o
o
( ) ,N N N N N N Np N p N p N N p N p p p N pp p
= = = +
2 2
2 2 2 2 2
2 21
( ) ( )
( ) ( )( ) ( )( )
( ) ( )
! !
! ! ! !
N NN N N N
N N
N NN p p N p q
pN N N N N N
= =
= +
2
2 2
2
o oo oo
o o
o o
( ) ( )( )
( ) ( ) ( ) ( )Np p q pN p N N pN
p
= + + = +
2
2 2
2 1
o
o o o o
( )( ) ( ) ( ) ( )N N p N p N p N pN p = = 2 2
2 2 2 2 21
o o o o
)
( ) ( )( )N pN p = 1
21o
8/21/2019 Pathria Statistical Mechanics persian solution
97/210
( )( )
( )( )
( )
!,
! !
N N NNp N V p qN N N
=
oo
o
( ) ( )( ) ( ) ( )ln ln ! ln ! ln ! ln lnp N N N N N p N N q= + + o o o
( ) ( )
( )
( ) ( ) ( ) ( )
( )
exp{ ln ln ln
ln ln }
p N N N N N N N N
N p N N q
=
+ +
o o o o
o
( ) ( ) ( )
( )
( ) ( ) ( ) ( )
( )
ln ln ln
ln ln
f N N N N N N N N N
N p N N q
=
+ +
o o o o
o
( ) ( )( ) ( ) ( ) ( ) ...
N N N N
f N f Nf N f N N N N N
N N= =
= + + +
2
2
2
1
2
( )( )ln ln ln lnN N
fN N N p q
N =
= + +
o
( )= oN pN
( )( )ln ln ln lnN N
fN N p p q
N =
= + +
1
o
8/21/2019 Pathria Statistical Mechanics persian solution
98/210
.
( )( ) ( )ln ln ln ln lnpN N p p q= + + + =1o o o
=
=
o
N N
f
N
( ) ( )N N
f
N N N N pqN=
= =
2
2
1 1 1
o o
( ) ( ) ( )( )f N f N N NpqN= 21
2 o
( ) ( ),
, f N V
P N V e=
( ) ( ) ( )
( )
( )
( )
( )
( )
, exp
exp
p N V f N N pNpqN
C N pN pqN
=
=
2
2
1
2
1
2
o
o
o
o
( )( )
, ,P N V dN C pqN
= = 1
1
2o o
( ) ( )( )( ) ( )
, expp N V N pNpqN pqN
=
21 1
2 2
o
o o
)(
!
nn
n ne
2
8/21/2019 Pathria Statistical Mechanics persian solution
99/210
( )
ln ! ln ln ln
ln ln ln ln
n n n n n ne
n n n n n n n
= +
= + +
12
2
12
2
( )( )
( )( ) ( )
( )
!,
! !
N NNNp N V p pN N N
=
1
oo
o
( ) ( ), ,
Nif p N N pN N N
p = =
8/21/2019 Pathria Statistical Mechanics persian solution
100/210
.
,
,
,
N E ENr s sr
r s N Er s
r s
N Er s
r s
e z eP
De
D e
= =
=
Nr
N N= .
( ) ( ),EN s
N
Ns
z ez Q V T
P ND D
= =
:
( ) ( )
,! !
NN
N
V f TQQ V T
N N
= =1
( )( )expD z V f T=
( ) ( )
( )( ) ( ),
!exp
NNz V f TP N N z V f T
N z V f T
= =
( ) ( ) ( )
! !
N N
z V f T Nz V f T NP N e e
N N
= =
.
:
N N=
( ) ( )! !
N NN
N
N N
N N e N NN N e
N N
= == = =
2 2
2 2
o o
( ) ( ) ( )( )N N N
N N N N N NN N
= =
21 2
2 1
8/21/2019 Pathria Statistical Mechanics persian solution
101/210
( ) ( )
( ) ( )
N N
N N
N N N N NN
N N N N N
N
=
= +
22
2
2
22
2
2
( )
( ) ( )
!
! !
=
= =
+
=
= +
22
2
2
22
2
o
o o
NN
N
N
N N
N N
N N
NN N N
NN e
N
N Ne N e N
N N NN
N N N Ne N e e N e N N NN
= + = +
22 2
2
( ) ( )! !
N NN
N
N N
N N
e N NN N e N
N N N
e N e N
N
= =
= =
= =
o o
( )N N N N = =2 2 2
:
,
( ) ,V T
N V SN k T d dp dT
N N
= =
2
8/21/2019 Pathria Statistical Mechanics persian solution
102/210
.
( )d pV pdV V dp pdV N d S dT = + = + +
T T T T
V p p
V N V V V
= =
.
, , , ,V T N T V T N T
p N pN V V
N V V N V
= =
2
2 2
:
,N T
P N k T PV N k T
V V
= = 2
, ,V T N T
V p V N k T k T
N N V N V N
= = = +
2 2
2 2 2
( ) ( )k T
N k T N N NN
= = =
1
2
.
-
:
( ) ( ), , ,H r r p p p p k r rm
= + + 22 2
1 2 1 2 1 2 1 2
1 1
2 2
( ) ( ), expQ V T H d p d qh
= 3 3
1 3
1
8/21/2019 Pathria Statistical Mechanics persian solution
103/210
( ), ep p k
r rm mQ V T d p d p e d r d r
h
=
2 221 2
1 23 3 3 32 2 21 1 2 1 23
1
( ), e
p kr r
m
Q V T d p e d r d r h
=
22
21 23 3 32 2
1 1 23
1
,
,
r Rr r r r
R rr r R r
+ = =
+ = =
1 2 1
1 2 2
2
2
d r d r J d R d r =
33 3 3 3
1 2
,det det
,
r r
r rr rJ
r R r r
R R
= = =
1 2
1 2
1 2
1 1
2 2 1
21 1
2 2
( ), e e epp pyx z
m m mx y z
kr
Q V T d p d p d p
h
Ve d r
+ + +
=
222 2
3 3 32 2 21 3
2
32
1
8
8/21/2019 Pathria Statistical Mechanics persian solution
104/210
.
( ), ep kx rm
x
VQ V T d p e r dr
h
V m V m
h h kk
+
=
= =
62
2
3 22 21 3
33 3
3 4 2
33 3
2
48
2 2
8
2
o
( ) ( )( ),
,! !
N
N
N
V m
h kQ V T
Q V TN N
= =
334
2
3
1
2
!
N
N
NN N
V Z m
h k
D z QN
= =
= =
334
2
3
2
o o
exp V Z m
h k
=
334
2
3
2
ln
ln
Z V mq D
h k
k T Z k T V mp D
V V h k
= =
= =
334
2
3
334
2
3
2
2
8/21/2019 Pathria Statistical Mechanics persian solution
105/210
ln V m
N z q z Dz z h k
= = =
334
2
3
2
exp
ln lnN N
V Z m
h kD
A k T k Tz z
= =
33
4 2
3
2
ln z V m
N k T z k Th k
=
334
2
3
2
( ), , z V m
U q V T zh k
= =
334
2
3
3 2
-
:
:
( )
V
Q m k T h =
3
2
1 3
2
=j(1
2:(
8/21/2019 Pathria Statistical Mechanics persian solution
106/210
.
( )
( )
exp exp exp
,
=
= = +
= = =
1
2
11
2
1 1
2 2
12 2
2
B B B
m
B B
Q gm H gH gH
cosh gH cosh H g
:
( ) ( )BV
Q m k T cosh H h
=3
21 3
2 2
( ) ( ) ( ), ,!
N
N B
VQ V T N m k T cosh H
N h
=
3
23
1 22
( ) ( )!
NNN
N BN N
z VD z Q m k T cosh H
N h
= =
= =
3
22
2o o
( ) ( )exp!
Nx
BN
x z Ve D m k T Cosh H
N h
=
= =
3
23
2
o
( ) ( )
ln
ln
N
B
DA k T
z
z Vk T m k T cosh H N z
h
=
=
3
23
22
:)--(
( ) ( ) ( ),
B BT N
A z VM k T m k T sinh H
H h
= = 3
22
8/21/2019 Pathria Statistical Mechanics persian solution
107/210
:
( ) ( )B Bz V
M m k T sinh Hh
=
3
23
22
:
fi
Q HdM =
TV.
( ) ( ) ( )B B Bz V
dM m k T cosh H dH h
=
3
23
22
( ) ( ) ( )B B BHz V
Q m k T cosh H H dH h
=
3
23
22
o
( ) ( )HB Bz V m k T cosh H H dHh
= 3
22
31 2 2
o
( ) ( )
( )
H
H
B B
B
H
B
B
cosh H H dH H sinh H
sinh H dH
=
1
1
o
o
o
( ) ( )B BB B
Hsinh H cosh H
=
2
11
-
:
8/21/2019 Pathria Statistical Mechanics persian solution
108/210
.
NNo
:
( ) ( ) ( )
! !
! ! ! ! =
o o
o o
N
N
N NQ a T
N N N N N N
.( )a T
lnN
A k T Q=
( ) ( ) ( ) ( )
[ ln ln
ln ln
k T N N N N N N
N N N N N N N a T
= +
+ +
o o o
o o o
( ) ( ),
[ ln ln ln ]V T
A k T N N N a T N