Abstract
We present an alternative quantum treatment for a generalized mesoscopic RLC circuit with time-dependent resistance, inductance and capacitance. Taking advantage of the Lewis and Riesenfeld quantum invariant method and using quadratic invariants we obtain exact nonstationary Schrödinger states for this electromagnetic oscillation system. Afterwards, we construct coherent and squeezed states for the quantized RLC circuit and employ them to investigate some of the system’s quantum properties, such as quantum fluctuations of the charge and the magnetic flux and the corresponding uncertainty product. In addition, we derive the geometric, dynamical and Berry phases for this nonstationary mesoscopic circuit. Finally we evaluate the dynamical and Berry phases for three special circuits. Surprisingly, we find identical expressions for the dynamical phase and the same formulae for the Berry’s phase.
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Pedrosa, I.A., Melo, J.L. & Salatiel, S. Quantization, coherent states and geometric phases of a generalized nonstationary mesoscopic RLC circuit. Eur. Phys. J. B 87, 269 (2014). https://doi.org/10.1140/epjb/e2014-50174-5
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DOI: https://doi.org/10.1140/epjb/e2014-50174-5