The transition from a classical to a quantum world as a passage from extensive to non-extensive thermodynamics

Details The transition from a classical to a quantum world as a passage from extensive to non-extensive thermodynamics The transition from a classical to a quantum world as a passage from extensive to non-extensive thermodynamics

1998-10-27

arxiv.org/abs/quant-ph/9810083v1

Physics

Quantum Physics

RevTex, 4 pages, 4 eps figures

Scientific paper

We study the thermodynamical properties of the quantum kicked rotator, coarsened by an external fluctuation with a weak intensity D, by means of the Tsallis entropy with a changing entropic index q. The genuine entropic index, corresponding to given values of D and $\hbar$ is that making the Tsallis entropy increase linearly in time, and it is proved to become q <1 for suitably large values of $\hbar $: This indicates a subdiffusional regime which, in turn, signals the occurrence of quantum localization. Thus the process of Anderson localization is shown to be compatible with a thermodynamical representation provided that a non-extensive form of entropy is used.

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