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Generalization of parity-time and partial parity-time symmetry (1507.08850v2)
Published 31 Jul 2015 in quant-ph, math-ph, and math.MP
Abstract: We show that parity-time and partial parity-time symmetries are particular cases of antiunitary symmetry. This point is illustrated by means of a recently discussed system of non-Hermitian coupled harmonic oscillators that also exhibits other types of antiunitary symmetries. We also show that a combination of group and perturbation theory is a useful tool for predicting broken antiunitary symmetry.
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