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Saturday, April 25, 2015

Exploring Quantum Physics - Week 4 Question 6

Question:

Which of the following is most closely related to Goldstone's theorem?

Solution:

Without going through all the lectures in lecture 8, yet, I guess the answer is this one.

The spontaneously broken translational symmetry of the ground state of crystal implies the existence of gapless excitations, which turn out to be phonons.

We will see how that goes ... lecture time!

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