Power-Law Entanglement Spectrum in Many-Body Localized Phases.

  title={Power-Law Entanglement Spectrum in Many-Body Localized Phases.},
  author={Maksym Serbyn and A A Michailidis and Dmitry A. Abanin and Zlatko Papi{\'c}},
  journal={Physical review letters},
  volume={117 16},
The entanglement spectrum of the reduced density matrix contains information beyond the von Neumann entropy and provides unique insights into exotic orders or critical behavior of quantum systems. Here, we show that strongly disordered systems in the many-body localized phase have power-law entanglement spectra, arising from the presence of extensively many local integrals of motion. The power-law entanglement spectrum distinguishes many-body localized systems from ergodic systems, as well as… Expand

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