Dynamics-based nonclassicality witness under dissipative dynamics

• URL: http://arxiv.org/abs/2608.27337v1
• Date: Thu, 27 Aug 2026 16:39:15 GMT
• Title: Dynamics-based nonclassicality witness under dissipative dynamics
• Abstract summary: We show that the introduction of dissipation requires a dissipation-dependent shift of the classical bound.<n>We provide the threshold under which the nonclassicality witness retains its validity.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: A dynamics-based test, originally proposed by Tsirelson for the harmonic oscillator, provides a method for certifying quantumness under the assumption of a known Hamiltonian. These tests, however, are typically proposed for isolated systems, an assumption that breaks down in experimental implementation. In this paper, we extend the protocol to the harmonic oscillator coupled to standard models of dissipation: thermal relaxation, pure dephasing, and the Caldeira--Leggett model. Using the Moyal-Wigner formalism of quantum mechanics in phase space, we show that the introduction of dissipation requires a dissipation-dependent shift of the classical bound, and provide the threshold under which the nonclassicality witness retains its validity.

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