Lecture 7 | Quantum Entanglements, Part 1 (Stanford)

Lecture 7 of Leonard Susskind's course concentrating on Quantum Entanglements (Part 1, Fall 2006). Recorded November 6, 2006 at Stanford University.

This Stanford Continuing Studies course is the first of a three-quarter sequence of classes exploring the "quantum entanglements" in modern theoretical physics. Leonard Susskind is the Felix Bloch Professor of Physics at Stanford University.

Complete playlist for the course:
http://www.youtube.com/view_play_list?p=A27CEA1B8B27EB67

Stanford Continuing Studies: http://continuingstudies.stanford.edu/

About Leonard Susskind: http://www.stanford.edu/dept/physics/people/faculty/sussk...

Stanford University channel on YouTube:
http://www.youtube.com/stanford

Category:

Education

Tags:

• Science
• physics
• math
• theory
• relativity
• equation
• formula
• Leonard
• Susskind

[landin048]

This is harder without accompanying reading resources, but it's still wonderful to have the access to the information. Thank you for posting.

[garywpearson1955]

This stuff is pure gold!!! Thanx for posting.

[samurai1999]

The people asking questions should really learn not to ask questions

- they really destroy the flow of what Susskind is trying to explain

[BagarozziBoi]

Re: my comment below - turns out that yes, he's a many-worlds guy, so what he's saying is at least self-consistent.

[BagarozziBoi]

Great lecture. He sweeps the measurement/wavefunction collapse problem under the carpet though, (like most modern physicists) by trying to substitute measurement with entanglement. His explanation is ok, until you get to Schrodinger's cat type situations where the entangled states in the system post-experiment represent vastly different states even on a macroscopic level. (Couple the detector to the trigger of a nuclear bomb to see how dramatically different the entangled states can be).

[BagarozziBoi]

At this stage you have two choices. Either you subscribe to an Everret style many-worlds interpretation where the two macroscopically different states decohere and continue to evolve as parallel universes with minimal interference between them, or you accept that there's an unknown mechanism missing from current models of quantum mechanics whereby one of the macroscopic branches is selected by nature a-la Penrose. If he's going for a many-worlds view fine, but he should state that explicitly.

[grunder20]

Bald professors are always geniuses.

[HomemadeBanjo]

The whole section from 0:45 to 1:05 can be skipped with no loss. I'm amazed at his patience.

[rmgorichanaz]

Yes, please make an editing pass through these and remove the Geraldo Rivera-esque monologing from the peanut gallery

[MrRobotoToo]

Outstanding lecture, despite all the annoying questions.

[san34451]

Does anyone know where to find "Quantum Entanglements, Part 2"? Was it video-recorded? Only Part 1 and Part 3 are available on YouTube. StanfordUniversity did clarify that Part 2 "is unavailable at this time", but that was an year ago.