Equilibrium and ergodicity in small spin systems |
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| Authors: | JS WAUG |
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| Institution: | 1. Laboratoire de Physique Quantique, Ecole Supérieure de Physique &2. de Chimie Industrielles, 10, rue Vauquelin, 75005 , Paris , France |
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| Abstract: | The rearrangement of initial magnetic polarizations in a small isolated spin system does not lead to a uniform distribution as required by the microcanonical ensemble, but to a distribution of intermediate entropy as required by the initial conditions and auxiliary constants of the motion. The final equilibriumstate and the time to reach it are defined uniquely because of the finite number of discrete quantum states in such a system. Is such a system ergodic? |
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