An ETH-ansatz-based environmental-branch method derives master equations for open quantum systems by simplifying branch evolution over short time intervals, yielding decoherence rates consistent with random-matrix theory and justifying the Born approximation.
Indeed, in model numerical simulations, a banded structure of the functionf(e 0, ω) is usually ob- served with respect to the variableω
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An ETH-ansatz-motivated environmental-branch approach to open quantum systems
An ETH-ansatz-based environmental-branch method derives master equations for open quantum systems by simplifying branch evolution over short time intervals, yielding decoherence rates consistent with random-matrix theory and justifying the Born approximation.