Global symmetry breaking in two-dimensional flat spacetime and in de Sitter spacetime

Details Global symmetry breaking in two-dimensional flat spacetime and in de Sitter spacetime Global symmetry breaking in two-dimensional flat spacetime and in de Sitter spacetime

May 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986phrvd..33.2833f&link_type=abstract

Physical Review D (Particles and Fields), Volume 33, Issue 10, 15 May 1986, pp.2833-2839

Physics

17

Spontaneous And Radiative Symmetry Breaking, Theory Of Quantized Fields, Particle-Theory And Field-Theory Models Of The Early Universe

Scientific paper

The breaking of global continuous symmetries in two-dimensional flat spacetime and in four-dimensional de Sitter spacetime is investigated. Infrared divergences require physically allowable quantum states in these spaces to break Lorentz or de Sitter invariance, resulting in two-point functions which are explicitly time dependent. Field expectation values which break the global symmetry must decay in time, but it is possible to have a state which exhibits broken symmetry for a finite time. It is also possible for field correlations and energy density produced by a broken-symmetry state to persist after the symmetry has been restored.

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