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Saturday, May 23, 2015

Exploring Quantum Physics - Final Exam Part 1 Question 3

Question:

How to reduce the Feynman Integral to classical action?

Solution:

Recall that the Feynman Integral reduce to classical action when we take the exponential term to minimum, as required for the Laplace method. So the answer is

$ \delta S[x(t)] = 0 $

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