3 research outputs found
Magnetic flux in mesoscopic rings: Quantum Smoluchowski regime
Magnetic flux in mesoscopic rings under the quantum Smoluchowski regime is
investigated. Quantum corrections to the dissipative current are shown to form
multistable steady states and can result in statistical enhancement of the
magnetic flux. The relevance of quantum correction effects is supported v ia
the entropic criterion. A possible application for a qutrit architecture of
quantum information is proposed.Comment: 7 pages, 2 figure
Current characteristics of mesoscopic rings in quantum Smoluchowski regime
In normal mesoscopic metals of a ring topology persistent currents can be induced by threading the center of the ring with a magnetic flux. This phenomenon is an example of the famous Aharonov-Bohm effect. In the paper we study the current vs the external constant magnetic flux characteristics of the system driven by both the classical and the quantum thermal fluctuations. The problem is formulated in terms of Langevin equations in classical and quantum Smoluchowski regimes. We analyze the impact of the quantum thermal fluctuations on the current-flux characteristics. We demonstrate that the current response can be changed from paramagnetic to diamagnetic when the quantum nature of the thermal fluctuations increases