11 Black Holes Should Generate Ring of Light http://www.technologyreview.com/blog/arxiv/25182/
12 Falling into a black hole The scout, trapped by black hole, sends signals out. Same as with twins, slowing photos. What happens when they stop? We don’t actually know! Comes out on the other side?
14 Can get one so that it is past of the other! Some technical details have been elided Visser's recipe for a time machine: Acquire a traversable wormhole Induce a "time- shift" between the two mouths of the wormhole Bring the wormhole mouths together
16 Why pick on grandfather? It seems that the only way to prove that time travel is impossible is to cite a case of killing one's own grandfather. This incessant murdering of harmless ancestors must stop. Let's see some wide-awake fan make up some other method of disproving the theory.” – letter to Astounding Stories
20 No ticket! Planck desperate No excitation of the higher energy modes So, no infinity
21 Atoms exist! Like a bullet bouncing off a sheet of kleenex, a bit of a surprise. Coulomb showed atoms made of electrons & protons.
22 But shouldn’t! Protons & electrons rush to meet In 10^-8 seconds, destroy, giving off lots of energy
23 Uncertainty principle Think about a musical note Short, high frequency, well defined position Pure tone has less well defined position Well-defined time Well-defined frequency Time & frequency CANNOT both be well-defined [that’s math!]
24 Electron tries to get close, can’t If far from atom pulled in As it gets close is squeezed up But then momentum builds up And it races out Atom is a balance of these two pressures. No uncertainty, no us! That’s certain!
25 Double-slit experiment How can you be in two places at once when you aren't anywhere at all? - Firesign Theater
36 New Theories of Everything, Barrows From eternity to here, Sean Carroll How to build a time machine, Davies Physics of the Impossible, Kaku Time Machines, Nahin Timeless Reality, Stenger Endless Universe, Steinhardt & Turok Black Holes & Time Warps, Thorne The New Time Travelers, Toomey
37 www.timeandquantummechanics.com The future is here. It's just not widely distributed yet. William Gibson Before I came here I was confused about this subject. Having listened to your lecture I am still confused. But on a higher level." - Enrico Fermi What does that mean? Huh? "Time & quantum mechanics." I don't even know what the hell that means. – Old Jack Burton, on a dark & stormy night I have no doubt that in reality the future will be vastly more surprising than anything I can imagine. Now my own suspicion is that the universe is not only queerer than we suppose, but queerer than we can suppose. – J. B. S. Haldane