Mainz 2017 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 39: Ultracold atoms and BEC - IV (with A)

Q 39.2: Talk

Wednesday, March 8, 2017, 14:45–15:00, N 1

Characterization and investigation of topologically nontrivial states in PT-symmetric many-body systems — •Marcel Wagner, Holger Cartarius, and Günter Wunner — 1. Institut für Theoretische Physik, Universität Stuttgart, 70550 Stuttgart

PT-symmetric quantum mechanics allows for an effective description of open quantum systems with variable particle numbers. PT-symmetry of the quantum state ensures a purely real energy spectrum. Topologically nontrivial phases are known to occur in such many-body systems. However, their characterization is not yet well understood and raises open questions. We investigate ways to characterize topologically nontrivial phases in PT-symmetric quantum systems. The purpose of our work is to classify these phases by searching for appropriate topological invariants.