Ground State Asymptotics of a Dilute, Rotating Gas

Details Ground State Asymptotics of a Dilute, Rotating Gas Ground State Asymptotics of a Dilute, Rotating Gas

2003-06-09

arxiv.org/abs/math-ph/0306022v1

J. Phys. A: Math. Gen. 36, 9755-9778 (2003)

Physics

Mathematical Physics

LaTeX2e, 37 pages

Scientific paper

10.1088/0305-4470/36/37/312

We investigate the ground state properties of a gas of interacting particles confined in an external potential in three dimensions and subject to rotation around an axis of symmetry. We consider the so-called Gross-Pitaevskii (GP) limit of a dilute gas. Analyzing both the absolute and the bosonic ground state of the system we show, in particular, their different behavior for a certain range of parameters. This parameter range is determined by the question whether the rotational symmetry in the minimizer of the GP functional is broken or not. For the absolute ground state, we prove that in the GP limit a modified GP functional depending on density matrices correctly describes the energy and reduced density matrices, independent of symmetry breaking. For the bosonic ground state this holds true if and only if the symmetry is unbroken.

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