The grand canonical catastrophe as an instance of condensation of fluctuations
| Autor: | Marco Zannetti |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Physics
Quantum Physics Ideal (set theory) Photon Bose gas Statistical Mechanics (cond-mat.stat-mech) Condensation General Physics and Astronomy FOS: Physical sciences Connection (mathematics) Character (mathematics) Quantum Gases (cond-mat.quant-gas) Statistical physics Single degree of freedom Quantum Physics (quant-ph) Condensed Matter - Quantum Gases Realization (probability) Condensed Matter - Statistical Mechanics |
| Popis: | The so-called grand canonical catastrophe of the density fluctuations in the ideal Bose gas is shown to be a particular instance of the much more general phenomenon of condensation of fluctuations, taking place in a large system, in or out of equilibrium, when a single degree of freedom makes a macroscopic contribution to the fluctuations of an extensive quantity. The pathological character of the "catastrophe" is demystified by emphasizing the connection between experimental conditions and statistical ensembles, as demonstrated by the recent realization of photon condensation under grand canonical conditions. 6 pages, 1 figure |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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