theory of everything hawking film 6. atlantic city one side is glitzy one side is common
TRANSCRIPT
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Theory of Everything
• Hawking film 6
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Atlantic City
• One side is glitzy
• One side is common
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Physics Laws
• One side is Newtonian
• One side is relativity
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• Trace universe backward in time:
• Pushed toward the very small
• Quantum mechanics – very small
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TOE
• Large scale – Gravity rules
• Atomic forces – SNF
• Theory of everything must be unified
• Should be a theory that embraces all factors
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• Universe is a single point in the beginning
• A moment later, it is huge
• Intellect, intuition, experiment
• Observation makes inspiration
• SLAK, Palo Alto, CA
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• Accuracy to 15 decimal places or else universe flies apart before galaxies formed
• Uncanny balance between expansion and collapse
• Alan Guth -
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• Andrei Linde, Russian –
• Inflation theory (like Guth)
• Model – energy trapped in vacuum, energy could collapse like bubbles
• Balance - >>>>>
• Growing evenly in all directions
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• Guth – 70’s inflation• Happens like water boils – one here, one
there• Morrass – not like what our universe looks
like• Published with flaws• Ussr – cannot publish until all flaws worked
out
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• Linde – what if just one of the bubbles inflated and our universe emerged?
• Difficulty with Guth collision of bubbles
• One bubble will be larger than the universe
• Linde’s theory demolished
• Linde gave important idea – inflation
• Does not explain the start of the universe
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Run theory backwards in time
• Gravity field became infinitely high
• Logic replaced by chance
• Matter ruled by probability
• Equations blow up when it hits a singularity
• Quantum mechanics – strangest thing humans thought up
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Eisenberg uncertainty principle
• Never know with precision where small is
• Add up to certainties
• Only makes sense as a universe as a whole only at its beginning
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Problem of the singularity
• Quantum mechanics + gravity
• Solve simplified model of universe
• Imaginary time replaces singularity
• No boundary, no beginning, no end, just curves back on itself, no singularities
• Quantum mech is solution to singularity
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No Boundaries Proposal
• Need gen rel and quantum mech to be unified as quantum gravity
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One Simple Law
• Smolin, Lee – biology
• Universe choose its parameters
• Bio world - so many species
• So beautiful in so many ways
• Basic idea – some population – random changes on characteristics
• Darwin nat. selection
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• Universe invents life?
• How so much structure?
• Disc of spiral galaxy
• Patterns on sea shells
• Assembled from itself, create itself
• Could be wrong
• Not proved wrong yet
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What preceded creation?
• 1985 perestroika – reconstruction – forbid sending out papers
• Became ill• 24h to find something worth saying at conference• Theory of inflation that produced multitude of
universes – self-producing universe• Each product of own big bang• Seed others so process goes on and on
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• Single explanation of a single universe
• Super string theory
• Universe a dot
• Like a bowl of vibrating noodles that exploded into the diversity
• Kaku, M
• Bubbles, string
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Not Compatible
• Big – Einstein (smooth)
• Small – quantum (grainy)
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String
• Minute strands of space-time
• Atom size of soalr system
• String then size of atom
• Universm size of string
• String moves – vibrates
• Body is a synphony
• String forces curl up like gravity warp
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• Matter like atoms
• Forces that attract matter
• Dichotomy
• One string could be quark
• One a photon
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• Clouds – no symmetry
• Backwards to big bang – see symmetry perfect
• Superstring theory gives perfect symmetry as move backward
• Humans cannot understand equations of theory of everything at this time
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• String is no theory since it puts forth no predictions to be proved
• Math too difficult
• Theory smarter than we are
• Ed Witten – smartest man on earth
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Witten
• Don’t have overview of all details
• Math constructions – want strings to describe world
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• 5 theories describe universe – if one theory describes our univ.
• Who lives in others
• Duality –m relation between 2 theories that is not obvious
• One more useful in describing somethings
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• 5 blind scientists discovered trunk, ear foot
• Thought 5 animals
• Really one elephant
• Witten heir apparent to Einstein
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• Sometimes you know a little bit more
• Witten – get as far as we can is the best we can do – sponsor for life
• Hawking – 20 years to find all
• Quantum gravity
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• Neil turok, cambridge – exploring past – make map of all maps satellite
• Planck explorer – map whole sky at high resolution
• Esa
• Estec project
• Map holds vast amt of info
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• Map of very early times –
• Map of temp variations on the sky
• Secrets, signature of creation on map
• Time to know ultimate truth
• Absence of data so theories abound
• Provide framework within which one can make predictions
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• Answer questions or ask more?
• Theories beat to death – predictions
• Within 10 years have data that will tell how structure formed in the universe
• Get busy – only have 10 years
• Get how but not why – know mind of God
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