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The partition function and level density for Yang–Mills–Higgs quantum mechanics

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S G Matinyan1,3 and Y Jack Ng2

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LETTER TO THE EDITOR

We calculate the partition function Z(t) and the asymptotic integrated level density N(E) for Yang–Mills–Higgs quantum mechanics for two and three dimensions (n = 2, 3). Due to the infinite volume of the phase space Γ on energy shell for n = 2, it is not possible to completely disentangle the coupled oscillators (x2 y2 model) from the Higgs sector. The situation is different for n = 3 for which Γ is finite. The transition from order to chaos in these systems is expressed by the corresponding transitions in Z(t) and N(E), analogous to the transitions in adjacent level spacing distribution from Poisson distribution to Wigner–Dyson distribution. We also discuss a related system with quartic coupled oscillators and two dimensional quartic free oscillators for which, contrary to YMHQM, both coupling constants are dimensionless.


PACS

11.15.Kc Classical and semiclassical techniques

05.45.Mt Quantum chaos; semiclassical methods

11.10.Ef Lagrangian and Hamiltonian approach

MSC

81T13 Yang-Mills and other gauge theories (See also 53C07, 58E15)

34C15 Nonlinear oscillations, coupled oscillators

81S30 Phase space methods including Wigner distributions, etc.

81Q50 Quantum chaos (See also 37Dxx)

Subjects

Statistical physics and nonlinear systems

Particle physics and field theory

Dates

Issue 25 (27 June 2003)

Received 2 January 2003, in final form 14 April 2003

Published 12 June 2003



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