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Physics 6335 - Quantum Mechanics I

Course Information

Fall 2021

"Shut up and calculate!" -- N. David Mermin

"I think I can safely say that nobody understands quantum mechanics." —Richard Feynman, The Character of Physical Law (MIT Press: Cambridge, Massachusetts, 1995), 129.
"Those who are not shocked when they first come across quantum theory cannot possibly have understood it." --Niels Bohr, in a 1952 conversation with Heisenberg and Pauli in Copenhagen; quoted in Heisenberg, Werner, Physics and Beyond. (New York: Harper & Row, 1971) p. 206.
Thirty-one years ago [1948], Dick Feynman told me about his "sum over histories" version of quantum mechanics. "The electron does anything it likes,"he said. "It just goes in any direction at any speed, forward or backward in time, however it likes, and then you add up the amplitudes and it gives you the wave-function." I said to him, "You're crazy." But he wasn't. -- Freeman Dyson, 1980, in Some Strangeness in the Proportion: A Centennial Symposium to Celebrate the Achievements of Albert Einstein (Harry Woolf, editor; report of the Einstein Centennial Symposium held 4-9 March 1979 at Princeton, New Jersey) 1980, page 376 quoted in Nick Herbert, Quantum Reality: Beyond the New Physics (1985) page 53
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