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Dynamical Disentangling and Cooling of Atoms in Bilayer Optical Lattices
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory. Nordita - KTH Royal Institute of Technology and Stockholm University.
Department of Physics and Astronomy, University of Pittsburgh.
Department of Physics and SUPA, University of Strathclyde.
2018 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 120, no 6, article id 060401Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
American Physical Society, 2018. Vol. 120, no 6, article id 060401
Keywords [en]
Ultracold atoms, entropy, strong correlations, cooling
National Category
Atom and Molecular Physics and Optics
Research subject
Theoretical Physics
Identifiers
URN: urn:nbn:se:uu:diva-341429DOI: 10.1103/PhysRevLett.120.060401ISI: 000424092100001PubMedID: 29481272OAI: oai:DiVA.org:uu-341429DiVA, id: diva2:1181418
Funder
EU, Horizon 2020, 641277Available from: 2018-02-08 Created: 2018-02-08 Last updated: 2018-05-02Bibliographically approved

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Kantian, Adrian

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