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Quantum Thermodynamics

Subexponentially growing Hilbert space and nonconcentrating distributions in a constrained spin model

arXiv
Authors: Jason R. Webster, Michael Kastner

Year

2017

Paper ID

44898

Status

Preprint

Abstract Read

~2 min

Abstract Words

107

Citations

N/A

Abstract

Motivated by recent experiments with two-component Bose-Einstein condensates, we study fully-connected spin models subject to an additional constraint. The constraint is responsible for the Hilbert space dimension to scale only linearly with the system size. We discuss the unconventional statistical physical and thermodynamic properties of such a system, in particular the absence of concentration of the underlying probability distributions. As a consequence, expectation values are less suitable to characterize such systems, and full distribution functions are required instead. Sharp signatures of phase transitions do not occur in such a setting, but transitions from singly peaked to doubly peaked distribution functions of an "order parameter" may be present.

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  • This paper contributes to the Quantum Thermodynamics research area in the Quantum Articles archive.
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  • Motivated by recent experiments with two-component Bose-Einstein condensates, we study fully-connected spin models subject to an additional constraint.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1706.09832 [2] arXiv https://arxiv.org/abs/1706.09832 [3] Publisher https://arxiv.org/abs/1706.09832

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