Decoherence of Schrödinger cat states in light of wave/particle duality

• URL: http://arxiv.org/abs/2501.12328v1
• Date: Tue, 21 Jan 2025 17:51:16 GMT
• Title: Decoherence of Schrödinger cat states in light of wave/particle duality
• Authors: Th. K. Mavrogordatos,
• Abstract summary: We generate self-consistent collections of pure system states correlated with specific environmental records. We find that the complementary unravelings evince a pronounced disparity when the position'' and momentum'' of the damped cavity mode are measured.
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• Abstract: We challenge the standard picture of decohering Schr\"odinger cat states as an ensemble average obeying a Lindblad master equation, brought about locally from an irreversible interaction with an environment. We generate self-consistent collections of pure system states correlated with specific environmental records, corresponding to the function of the wave-particle correlator first introduced in Carmichael {\it et al.} [Phys. Rev. Lett. 85, 1855 (2000)]. In the spirit of Carmichael {\it et al.} [Coherent States: Past, Present and Future, pp. 75--91, World Scientific (1994)], we find that the complementary unravelings evince a pronounced disparity when the ``position'' and ``momentum'' of the damped cavity mode -- an explicitly open quantum system -- are measured. Intensity-field correlations may largely deviate from a monotonic decay, while Wigner functions of the cavity state display contrasting manifestations of quantum interference when conditioned on photon counts sampling a continuous photocurrent. In turn, the conditional photodetection events mark the contextual diffusion of both the net charge generated at the homodyne detector, and the electromagnetic field amplitude in the resonator.

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