Abstract
We discuss a scheme to measure the many-body entanglement growth during quench dynamics with bosonic atoms in optical lattices. By making use of a 1D or 2D setup in which two copies of the same state are prepared, we show how arbitrary order Rényi entropies can be extracted by using tunnel coupling between the copies and measurement of the parity of on-site occupation numbers, as has been performed in recent experiments. We illustrate these ideas for a superfluid-Mott insulator quench in the Bose-Hubbard model, and also for hard-core bosons, and show that the scheme is robust against imperfections in the measurements.
- Received 7 May 2012
DOI:https://doi.org/10.1103/PhysRevLett.109.020505
© 2012 American Physical Society
Synopsis
Measuring Many-Body Entanglement
Published 12 July 2012
Two proposed experiments may allow measurement of how much entanglement is present in a many-body quantum system.
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