Bond current in a mesoscopic ring -- signature of decoherence due to classical and quantum noise

• URL: http://arxiv.org/abs/2206.11139v1
• Date: Wed, 22 Jun 2022 14:35:16 GMT
• Title: Bond current in a mesoscopic ring -- signature of decoherence due to classical and quantum noise
• Abstract summary: A three-site mesoscopic ring provides an ideal setting for an exact calculation of the bond current when the ring is threaded by an Aharonov-Bohm flux. The coherence-to-incoherence transition is analyzed in detail here for both classical (Gaussian and telegraphic) and quantum noise.
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• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: A three-site mesoscopic ring provides an ideal setting for an exact calculation of the bond current when the ring is threaded by an Aharonov-Bohm flux. The bond current is a measurable outcome of the coherent properties of the quantum phase. However the coherence is impeded by noise when the ring is put in contact with an environment. This coherence-to-incoherence transition is analyzed in detail here for both classical (Gaussian and telegraphic) and quantum noise and a comparative assessment is made when the quantum noise is governed by a spin-boson Hamiltonian of dissipative quantum mechanics.

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