Not your Grandfather's Gravity
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Not your
Grandfather’s Gravity!
John Ashmead
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.comTuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
Endeavor blasts off
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
Outline
•A brief history of gravity
•The Runaway universe
•At the edge of the known
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
Galileo
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
Orbits of the planets
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
Mysterium Cosmographicum
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
Mysterium Cosmographicum
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
Mysterium Cosmographicum
Science is organized
common sense where many a
beautiful theory is killed by an
ugly fact. - Huxley
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
Kepler’s orbits,Newton’s Law
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
Kepler’s orbits,Newton’s Law
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
Hollow Earth
Tuesday, May 31, 2011
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Cavendish
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
Cavendish
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
Equivalence principle
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.comTuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
Of ants & apples
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
Parallel transport
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.comTuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
Riemann Curvature Tensor
Effect of curvature
a
a
b
b
b
c
d
d = ∇ b( )∇ a( ) − ∇ a( )∇ b( )( )cTuesday, May 31, 2011
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Einstein’s field equation
Tuesday, May 31, 2011
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Einstein’s field equation
xd = Rabcd xc
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
Einstein’s field equation
xd = Rabcd xc Tµν
fluid( ) =
ρ 0 0 00 p 0 00 0 p 00 0 0 p
⎛
⎝
⎜⎜⎜⎜⎜
⎞
⎠
⎟⎟⎟⎟⎟
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Not your grandfather’s gravity www.timeandquantummechanics.com
Einstein’s field equation
xd = Rabcd xc Tµν
fluid( ) =
ρ 0 0 00 p 0 00 0 p 00 0 0 p
⎛
⎝
⎜⎜⎜⎜⎜
⎞
⎠
⎟⎟⎟⎟⎟
Rµν −12gµνR =
8πGc2
Tµν
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
Einstein’s field equation
− gµνΛ
xd = Rabcd xc Tµν
fluid( ) =
ρ 0 0 00 p 0 00 0 p 00 0 0 p
⎛
⎝
⎜⎜⎜⎜⎜
⎞
⎠
⎟⎟⎟⎟⎟
Rµν −12gµνR =
8πGc2
Tµν
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
Quantum gravity
•Gravity is itself a source of gravity
•Quantum mechanics predicts almost infinite cosmological constant
Tuesday, May 31, 2011
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Hawking Radiation
Tuesday, May 31, 2011
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Black hole information paradox
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
Black hole information paradox
Tuesday, May 31, 2011
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Thermodynamics & gravity
Tuesday, May 31, 2011
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Thermodynamics & gravity
•Surface gravity ~ Temperature
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
Thermodynamics & gravity
•Surface gravity ~ Temperature
•Area ~ entropy
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
Thermodynamics & gravity
•Surface gravity ~ Temperature
•Area ~ entropy
•Mass ~ energy
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
Thermodynamics & gravity
•Surface gravity ~ Temperature
•Area ~ entropy
•Mass ~ energy
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
Entropic gravity
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
Entropic gravity
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
Entropic gravity
For me gravity doesn’t exist,” — Verlinde
Tuesday, May 31, 2011
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NASA / WMAP Science Team
Tuesday, May 31, 2011
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NASA / WMAP Science Team
Tuesday, May 31, 2011
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Type Ia supernova
Tuesday, May 31, 2011
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The music of the spheres
http://www.astro.uvic.ca/~alexhp/new/supernova_sonata.html
Tuesday, May 31, 2011
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Baryonic Matter (us)
Tuesday, May 31, 2011
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Rapidly spinning galaxies
Tuesday, May 31, 2011
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Seeing the invisible
Tuesday, May 31, 2011
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Dark energy
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.comTuesday, May 31, 2011
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The edge of the known
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
The edge of the known
•Astronomy
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
The edge of the known
•Astronomy
• Neutrinos
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
The edge of the known
•Astronomy
• Neutrinos
• Cosmic rays
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
The edge of the known
•Astronomy
• Neutrinos
• Cosmic rays
• Gravity waves
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
The edge of the known
•Astronomy
• Neutrinos
• Cosmic rays
• Gravity waves
• Wimps
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
The edge of the known
•Astronomy
• Neutrinos
• Cosmic rays
• Gravity waves
• Wimps
•CERN/LHC
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
The edge of the known
•Astronomy
• Neutrinos
• Cosmic rays
• Gravity waves
• Wimps
•CERN/LHC
• Higgs Boson
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
The edge of the known
•Astronomy
• Neutrinos
• Cosmic rays
• Gravity waves
• Wimps
•CERN/LHC
• Higgs Boson
• Wimps
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
The edge of the known
•Astronomy
• Neutrinos
• Cosmic rays
• Gravity waves
• Wimps
•CERN/LHC
• Higgs Boson
• Wimps
• Strings
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
The edge of the known
•Astronomy
• Neutrinos
• Cosmic rays
• Gravity waves
• Wimps
•CERN/LHC
• Higgs Boson
• Wimps
• Strings
• Baby Black Holes
Tuesday, May 31, 2011
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Neutrinos
Neutron
Tuesday, May 31, 2011
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Neutrinos
Neutron DecayNeutron
Tuesday, May 31, 2011
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Neutrinos
Sudbery Neutrino Detector
Neutron DecayNeutron
Tuesday, May 31, 2011
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Cosmic Rays
Tuesday, May 31, 2011
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Cosmic Rays
Tuesday, May 31, 2011
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Gravity Waves
Tuesday, May 31, 2011
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Gravity Waves
Tuesday, May 31, 2011
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Gravity Waves
Binary pulsar
Tuesday, May 31, 2011
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Gravity Waves
Tuesday, May 31, 2011
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Wimps
Tuesday, May 31, 2011
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CERN
Tuesday, May 31, 2011
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CERN
Tuesday, May 31, 2011
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CERN
Tuesday, May 31, 2011
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Higgs Bosons
Tuesday, May 31, 2011
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String theory & Calabi-Yau spaces
Tuesday, May 31, 2011
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Research is the process of going up alleys to see if they are blind
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
Research is the process of going up alleys to see if they are blind
•Quark gluon plasmas
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
Research is the process of going up alleys to see if they are blind
•Quark gluon plasmas
•Cyclic universes
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
Research is the process of going up alleys to see if they are blind
•Quark gluon plasmas
•Cyclic universes
•Inflation
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
Research is the process of going up alleys to see if they are blind
•Quark gluon plasmas
•Cyclic universes
•Inflation
•Curious abundance of anti-matter
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
Research is the process of going up alleys to see if they are blind
•Quark gluon plasmas
•Cyclic universes
•Inflation
•Curious abundance of anti-matter
•…
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
May 27th, 2011Daily Galaxy
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
May 27th, 2011Daily Galaxy
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
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, ...
Tuesday, May 31, 2011
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Not your grandfather’s gravity www.timeandquantummechanics.com
•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,…
Tuesday, May 31, 2011