Rotating-Wave and Secular Approximations for Open Quantum Systems

• URL: http://arxiv.org/abs/2603.26606v1
• Date: Fri, 27 Mar 2026 17:04:04 GMT
• Title: Rotating-Wave and Secular Approximations for Open Quantum Systems
• Abstract summary: We show how this result can be employed to provide an explicit upper bound on the error of the rotating-wave approximation in the presence of dissipation and decoherence.<n>We apply the derived bound to the strong-coupling limit in open quantum systems and to the secular approximation used to obtain a master equation from the Redfield equation.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We derive a nonperturbative bound on the distance between evolutions of open quantum systems described by time-dependent generators. We show how this result can be employed to provide an explicit upper bound on the error of the rotating-wave approximation in the presence of dissipation and decoherence. We apply the derived bound to the strong-coupling limit in open quantum systems and to the secular approximation used to obtain a master equation from the Redfield equation.

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