Coherence, entanglement, and quantumness in closed and open systems with conserved charge, with an application to many-body localization

  title={Coherence, entanglement, and quantumness in closed and open systems with conserved charge, with an application to many-body localization},
  author={Katarzyna Macieszczak and Emanuele Levi and Tommaso Macr{\`i} and Igor Lesanovsky and Juan P. Garrahan},
  journal={Physical Review A},
While the scaling of entanglement in a quantum system can be used to distinguish many-body quantum phases, it is usually hard to quantify the amount of entanglement in mixed states of open quantum systems, while measuring entanglement experimentally, even for the closed systems, requires in general quantum state tomography. In this work we show how to remedy this situation in system with a fixed or conserved charge, e.g., density or magnetization, due to an emerging relation between quantum… 
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