When is a Physical Quantity Conserved in Quantum Mechanics?

It is always interesting to know whether there are quantities in a physical system that are constant over time, so-called conserved quantities. In this video, we will explore the condition for whether a quantity is conserved and what this has to do with the Hamiltonian of the system.

References:
[1] Henley, Garcia, "Subatomic Physics" (2007).

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