The Nature of Time & quantum mechanics

1. The Nature ofTime & quantum mechanics • John Ashmead

2. Positronic Brains baffled!

3. Of Time and the river

4. block universe The plane of the present Moon Earth

5. Relativity vs The quantum

6. Twin paradox

7. Time seriously twisted http://www.youtube.com/watch?v=f0VOn9r4dq8

8. Black Holes Should Generate Ring of Light 8 http://www.technologyreview.com/blog/arxiv/25182/

9. How wonderful that we have met with a paradox. Now we have some hope of making progress. – Niels Bohr

10. “…there are known knowns; there are things we know we know. We also know there are known unknowns; that is to say we know there are some things we do not know. But there are also unknown unknowns – the ones we don't know we don't know.” — Donald of Rumsfeld

11. Three topics • Delayed choice quantum eraser • Time symmetric quantum mechanics • The inflationary vs the endless universe

12. Delayed choice quantum eraser • Double slit experiment • Single slit • No peeking • Quantum eraser • Delayed choice quantum eraser • Great smoky dragon

13. Double slit experiment

14. Double slit experiment

15. Double slit, in motion

16. Single slit, in motion

17. If you look, you destroy the interference

18. Quantum eraser setup

19. Quantum eraser, act I http://grad.physics.sunysb.edu/~amarch/

20. Quantum eraser, act II

21. Quantum eraser, act III Double slit quantum eraser - Walborn, Cunha, Pádua, Monken

23. Great smoky dragon

24. Time symmetric quantum mechanics • Reasoning backwards • Two state formalism • Weak measurements • Two experiments • Backwards in time?

25. In solving a problem of this sort, the grand thing is to be able to reason backward.

26. John Cramer’s transactionAL interpretation

27. Time symmetry in the quantum process of measurement Aharonov, bergman, lebowitz

28. Two-state formalism • Represent wave function by a state from past & a state from the future • Looks a lot like the usual rules, just from a different angle

29. Weak measurements

30. Ultrasensitive Beam Deflection Measurement via Interferometric Weak Value Amplification This mirror moves, a step at a time Dixon, Starling, Jordan, & Howell

31. Backwards in time?

32. Inflation vs the endless universe • Inflation • From Eternity to Here, Carroll • Problems • Endless universe, Steinhardt & Turok • Stuff they agree on • And how to disambiguate!

34. Inflate, then slow down

35. A universe is born

36. TimeSymmetricBirthsOf universes

37. Very rapid inflation

39. Flaws of inflation • Source of inflationary energy? • How did space & time begin? • Why did big bang lead to inflation? • Why don’t we see runaway inflation?

40. Endless universeSteinhardt & turok

41. When branes collide

43. Entropy in the endless universe

44. Five tests survived • Nearly scale invariant background • Space flat, not curved • Matter, dark matter, & radiation have same distribution • Distribution is random in right way • Slight tilt towards red end of spectrum … By inflationary & cyclic!

45. Gravitational radiation http://www.physorg.com/news180173220.html

46. When Ideas have sex In other words, our ancestors had sex with people they knew, but their ideas had sex with strangers, and this form of trade led to trust and prosperity.– Michael Shermer, June 2010 Scientific American

47. References • From eternity to here, Sean Carroll • Endless Universe, Steinhardt & Turok • The New Time Travelers, Toomey • Physics of the Impossible, Kaku • New Theories of Everything, Barrows

48. 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 What does that mean? Huh? "Tie & quatum mechanics." I don't even know what the hell that means. – Old Jack Burton, on a dark & story night 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 The future is here. It's just not widely distributed yet.  William Gibson www.timeandquantummechanics.com