Question

Is the unitary operator in the Heisenberg picture always the same?

Answer 1

## In the Heisenberg picture the time evolution is switched, such that it is located within the operators. 

Answer 2

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Is the unitary operator in the Heisenberg picture always the same?

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♀️The Schrödinger picture allows for an evolving state, which evolves through a unitary, reversible evolution (Schrödinger’s equation, represented by the Hamiltonian operator) and an irreversible evolution (wave function collapse, represented by a projection operator).

♀️The Heisenberg picture holds the states constant and evolves the operators instead. It provides an equivalent representation of the unitary evolution on operators, but I haven't yet seen an equivalent Heisenberg representation of wave function collapse.

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