Thermodynamics of a non-commutative fermion gas

Details Thermodynamics of a non-commutative fermion gas Thermodynamics of a non-commutative fermion gas

2008-10-17

arxiv.org/abs/0810.3064v1

J.Phys.A41:505003,2008

Physics

High Energy Physics

High Energy Physics - Theory

18 pages, 11 figures

Scientific paper

10.1088/1751-8113/41/50/505003

Building on the recent solution for the spectrum of the non-commutative well in two dimensions, the thermodynamics that follows from it is computed. In particular the focus is put on an ideal fermion gas confined to such a well. At low densities the thermodynamics is the same as for the commutative gas. However, at high densities the thermodynamics deviate strongly from the commutative gas due to the implied excluded area resulting from the non-commutativity. In particular there are extremal macroscopic states, characterized by area, number of particles and angular momentum, that correspond to a single microscopic state and thus have vanishing entropy. When the system size and excluded area are comparable, thermodynamic quantities, such as entropy, exhibit non-extensive features.

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