Lecture 5 | Modern Physics: Quantum Mechanics (Stanford)

Lecture 5 of Leonard Susskind's Modern Physics course concentrating on Quantum Mechanics. Recorded February 11, 2008 at Stanford University.

This Stanford Continuing Studies course is the second of a six-quarter sequence of classes exploring the essential theoretical foundations of modern physics. The topics covered in this course focus on quantum mechanics. Leonard Susskind is the Felix Bloch Professor of Physics at Stanford University.

Complete playlist for the course:
http://youtube.com/view_play_list?p=189C0DCE90CB6D81

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

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

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

Category:

Education

Tags:

• Physics
• math
• calculus
• geometry
• algebra
• statistics
• quantum
• mechanics
• periodic
• line
• finite
• infinite
• wave
• function
• eigen
• values
• hermitian
• operator
• inner
• product
• outer
• momentum
• fouier
• transform
• polarization
• relativity

[akudigobo]

thank you so much !!!

[luzzie9]

Always amazing how a master teacher can make a complex topic appear easy. If you cannot learn quantum mechanics from Susskind, you never will.

[anakmudajaman]

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[imegatrone]

I Really Like The Video Modern Physics course concentrating on Quantum Mechanics From Your

[alecbrady]

@PanZajko

The polarization along x and y are mutually exclusive - if it's x, then it isn't y. But if it's x, then it might or might not be 45deg - prob (x'|x)=cos(x-x'), where x-x' is the angle between the two directions.

The NOT-polarized state doesn't exist for individual photons - it's just what happens when you have a beam of light whose photons are polarized in random directions.

HTH

[system0system0]

Why is he so smart ? Has he been genetecaly modified.

[arthurmee]

This series gets a great thumbs up from me. To be able to access such a valuable for free is something i shall forever be grateful for. I love this man's style and his accent. I'm European, so is this a New York accent?

[loopantenna]

@jamma246 In fact the photon has equal probability of being detected along x and along y, which is 1/2. The probability to detect it along 45 is certain. Any possible state can be represented in any possible base. A base is formed with orthogonal eigen vectors.

[jamma246]

There is something that I don't understand:

When he is looking at polarisation, he states that a particle polarised at 45 degrees is |x>+|y> / (root2). But following the logic before, wouldn't this be the mixed state that would be equal probability of being one state OR the other? Shouldn't you technically create a new state which is 100% certain of being at 45 degrees to remain consistent?

[jamma246]

I want him to be my dad.