Dynamical disentangling and cooling of atoms in bilayer optical lattices

A. Kantian, S. Langer, A. J. Daley

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We show how experimentally available bilayer lattice systems can be used to prepare quantum many-body states with exceptionally low entropy in one layer, by dynamically disentangling the two layers. This disentangling operation moves one layer - subsystem A - into a regime where excitations in A develop a single-particle gap. As a result, this operation maps directly to cooling for subsystem A, with entropy being shuttled to the other layer. For both bosonic and fermionic atoms, we study the corresponding dynamics showing that disentangling can be realized cleanly in ongoing experiments. The corresponding entanglement entropies are directly measurable with quantum gas microscopes, and, as a tool for producing lower-entropy states, this technique opens a range of applications beginning with simplifying production of magnetically ordered states of bosons and fermions.

Original languageEnglish
Article number060401
Number of pages5
JournalPhysical Review Letters
Issue number6
Early online date5 Feb 2018
Publication statusPublished - 9 Feb 2018


  • entanglement
  • bilayer lattice system
  • bosonic atoms
  • fermionic atoms

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