Symmetry-Protected Topological Order in Open Systems

ORAL

Abstract

This talk will discuss the robustness of symmetry protected topological (SPT) order to evolution by noisy channels. By studying the evolution of non-local string order parameters, we find that one-dimensional SPT order is destabilized by generic couplings to the environment as well as by couplings satisfying a weak symmetry condition that directly generalizes from closed systems. We introduce a stronger symmetry condition on channels that ensures SPT order is preserved.

*This work is supported in part by the Max Planck Institute of Quantum Optics (MPQ) and the Max Planck Harvard Research Center for Quantum Optics (MPHQ).

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Publication: C. de Groot, A. Turzillo, N. Schuch, "Symmetry-Protected Topological Order in Open Systems," in preparation.

Presenters

  • Alex Turzillo

    • Max Planck Institute of Quantum Optics

Authors

  • Alex Turzillo

    • Max Planck Institute of Quantum Optics

  • Caroline de Groot

    • Max Planck Institute of Quantum Optics

  • Norbert Schuch

    • University of Vienna