Not your Grandfather's Gravity

Not your

Grandfather’s Gravity!

John Ashmead

Tuesday, May 31, 2011

Not your grandfather’s gravity www.timeandquantummechanics.comTuesday, May 31, 2011

http://www.timeandquantummechanics.com


Not your grandfather’s gravity www.timeandquantummechanics.com

Endeavor blasts off





Outline

•A brief history of gravity

•The Runaway universe

•At the edge of the known





Galileo





Orbits of the planets





Mysterium Cosmographicum











Science is organized

common sense where many a

beautiful theory is killed by an

ugly fact. - Huxley





Kepler’s orbits,Newton’s Law





Kepler’s orbits,Newton’s Law





Hollow Earth





Cavendish





Cavendish





Equivalence principle








Of ants & apples





Parallel transport








Riemann Curvature Tensor

Effect of curvature

a

a

b

b

b

c

d

d = ∇ b( )∇ a( ) − ∇ a( )∇ b( )( )cTuesday, May 31, 2011




Einstein’s field equation






xd = Rabcd xc






xd = Rabcd xc Tµν

fluid( ) =

ρ 0 0 00 p 0 00 0 p 00 0 0 p

⎛

⎝

⎜⎜⎜⎜⎜

⎞

⎠

⎟⎟⎟⎟⎟






xd = Rabcd xc Tµν

fluid( ) =

ρ 0 0 00 p 0 00 0 p 00 0 0 p

⎛

⎝

⎜⎜⎜⎜⎜

⎞

⎠

⎟⎟⎟⎟⎟

Rµν −12gµνR =

8πGc2

Tµν






− gµνΛ

xd = Rabcd xc Tµν

fluid( ) =

ρ 0 0 00 p 0 00 0 p 00 0 0 p

⎛

⎝

⎜⎜⎜⎜⎜

⎞

⎠

⎟⎟⎟⎟⎟

Rµν −12gµνR =

8πGc2

Tµν





Quantum gravity

•Gravity is itself a source of gravity

•Quantum mechanics predicts almost infinite cosmological constant





Hawking Radiation





Black hole information paradox





Black hole information paradox





Thermodynamics & gravity






•Surface gravity ~ Temperature







•Area ~ entropy







•Area ~ entropy

•Mass ~ energy







•Area ~ entropy

•Mass ~ energy





Entropic gravity





Entropic gravity





Entropic gravity

For me gravity doesn’t exist,” — Verlinde





NASA / WMAP Science Team





NASA / WMAP Science Team





Type Ia supernova





The music of the spheres

http://www.astro.uvic.ca/~alexhp/new/supernova_sonata.html







Baryonic Matter (us)





Rapidly spinning galaxies





Seeing the invisible






Dark energy








The edge of the known






•Astronomy






•Astronomy

• Neutrinos






•Astronomy

• Neutrinos

• Cosmic rays






•Astronomy

• Neutrinos

• Cosmic rays

• Gravity waves






•Astronomy

• Neutrinos

• Cosmic rays

• Gravity waves

• Wimps






•Astronomy

• Neutrinos

• Cosmic rays

• Gravity waves

• Wimps

•CERN/LHC






•Astronomy

• Neutrinos

• Cosmic rays

• Gravity waves

• Wimps

•CERN/LHC

• Higgs Boson






•Astronomy

• Neutrinos

• Cosmic rays

• Gravity waves

• Wimps

•CERN/LHC

• Higgs Boson

• Wimps






•Astronomy

• Neutrinos

• Cosmic rays

• Gravity waves

• Wimps

•CERN/LHC

• Higgs Boson

• Wimps

• Strings






•Astronomy

• Neutrinos

• Cosmic rays

• Gravity waves

• Wimps

•CERN/LHC

• Higgs Boson

• Wimps

• Strings

• Baby Black Holes





Neutrinos

Neutron





Neutrinos

Neutron DecayNeutron





Neutrinos

Sudbery Neutrino Detector

Neutron DecayNeutron





Cosmic Rays





Cosmic Rays





Gravity Waves





Gravity Waves





Gravity Waves

Binary pulsar





Gravity Waves





Wimps





CERN





CERN





CERN





Higgs Bosons





String theory & Calabi-Yau spaces





Research is the process of going up alleys to see if they are blind






•Quark gluon plasmas








•Cyclic universes








•Cyclic universes

•Inflation








•Cyclic universes

•Inflation

•Curious abundance of anti-matter








•Cyclic universes

•Inflation

•Curious abundance of anti-matter

•…






May 27th, 2011Daily Galaxy





May 27th, 2011Daily Galaxy





Since Jan 2010

•Gravity may be an entropic force

•Universe is definitely 95% mysterious

•Neutrino, Cosmic ray, Wimp, & gravitational telescopes online or in development

•LHC online & looking for Higgs boson, Calabi-Yau dimensions, ...





•Susskind: Cosmic Landscape, black hole war

•Halpern: Collider; Lincoln: large hadron collider

•Ananthaswamy: edge of physics

•Panek: 4% universe; Hammond: Unknown Universe

•Greene, Hawking, Smolin, Yau, Steinhardt & Turok, Wilczek,…




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Not your Grandfather's Gravity

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