Abstract
We have investigated the quantum fluctuation of electron in a mesoscopic ring interacting with a quantum electromagnetic field (QEMF) in squeezed coherent state (SCS). The nonclassical AB, AC effects and dynamic current fluctuation are associated with the U(1)× SU(2) gauge quantum field. The dynamic current fluctuation is dependent on the quantum nature of external QEMF. The Zeeman split term takes effect in the dynamic current fluctuation, while it disappears as ω→0. This means that the scalar AC effect does not contribute to static current fluctuation. The time-dependent and temperature dependent situations are studied versus time and temperature, which reveal quite different behaviors for zero-temperature and finite-temperature systems.
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