In Quantum Mechanics what is the significance when the average value of the commutator is zero? 
TL;DR: Heisenberg everything.
https://physics.stackexchange.com/questions/452777/significance-when-expectation-of-a-commutator-is-zero …
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In Quantum Mechanics what is the significance when the average value of the commutator is zero? 
TL;DR: Heisenberg everything.
https://physics.stackexchange.com/questions/452777/significance-when-expectation-of-a-commutator-is-zero …