Abstract
Using the path integral approach to equilibrium statistical physics the effect of dissipation on Landau diamagnetism is calculated. The calculation clarifies the essential role of the boundary of the container in which the electrons move. Further, the derived result for diamagnetization also matches with the expression obtained from a time-dependent quantum Langevin equation in the asymptotic limit, provided a certain order is maintained in taking limits. This identification then unifies equilibrium and nonequilibrium statistical physics for a phenomenon like diamagnetism, which is inherently quantum and strongly dependent on boundary effects. In addition we have shown that our results are directly connected with fluctuation induced diamagnetic susceptibility of superconducting grains.
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PACS Number: 03.65.Yz, 05.20.-y, 05.20.Gg, 05.40.-a, 75.20.-g
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Bandyopadhyay, M., Dattagupta, S. Dissipative Diamagnetism—A Case Study for Equilibrium and Nonequilibrium Statistical Mechanics. J Stat Phys 123, 1273–1284 (2006). https://doi.org/10.1007/s10955-006-9114-y
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DOI: https://doi.org/10.1007/s10955-006-9114-y