PT-symmetry and its spontaneous breakdown explained by anti-linearity

Details PT-symmetry and its spontaneous breakdown explained by anti-linearity PT-symmetry and its spontaneous breakdown explained by anti-linearity

2002-09-06

arxiv.org/abs/quant-ph/0209054v1

J. Opt. B 5 (2003) S416

Physics

Quantum Physics

8 pages

Scientific paper

10.1088/1464-4266/5/3/380

The impact of an anti-unitary symmetry on the spectrum of non-hermitean operators is studied. Wigner's normal form of an anti-unitary operator is shown to account for the spectral properties of non-hermitean, PT-symmetric Hamiltonians. Both the occurrence of single real or complex conjugate pairs of eigenvalues follows from this theory. The corresponding energy eigenstates span either one- or two-dimensional irreducible representations of the symmetry PT. In this framework, the concept of a spontaneously broken PT-symmetry is not needed.

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