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Kantian, Adrian
Publications (2 of 2) Show all publications
Kantian, A., Langer, S. & Daley, A. J. (2018). Dynamical Disentangling and Cooling of Atoms in Bilayer Optical Lattices. Physical Review Letters, 120(6), Article ID 060401.
Open this publication in new window or tab >>Dynamical Disentangling and Cooling of Atoms in Bilayer Optical Lattices
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
AMER PHYSICAL SOC, 2018
National Category
Condensed Matter Physics Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:kth:diva-224032 (URN)10.1103/PhysRevLett.120.060401 (DOI)000424092100001 ()2-s2.0-85041856186 (Scopus ID)
Note

QC 20180320

Available from: 2018-03-20 Created: 2018-03-20 Last updated: 2018-03-20Bibliographically approved
Kantian, A. & Abergel, D. (2017). True Bilayer Exciton Condensate of One-Dimensional Electrons. Physical Review Letters, 119(3), Article ID 037601.
Open this publication in new window or tab >>True Bilayer Exciton Condensate of One-Dimensional Electrons
2017 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 119, no 3, article id 037601Article in journal (Refereed) Published
Abstract [en]

We theoretically predict that a true bilayer exciton condensate, characterized by off-diagonal long-range order and global phase coherence, can be created in one-dimensional solid state electron systems. The mechanism by which this happens is to introduce a single particle hybridization of electron and hole populations, which locks the phase of the relevant mode and hence invalidates the Mermin-Wagner theorem. Electron-hole interactions then amplify this tendency towards off-diagonal long-range order, enhancing the condensate properties by more than an order of magnitude over the noninteracting limit. We show that the temperatures below which a substantial condensate fraction would form could reach hundreds of Kelvin, a benefit of the weak screening in one-dimensional systems.

Place, publisher, year, edition, pages
American Physical Society, 2017
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-211740 (URN)10.1103/PhysRevLett.119.037601 (DOI)000406046500026 ()2-s2.0-85026997542 (Scopus ID)
Note

QC 20170816

Available from: 2017-08-16 Created: 2017-08-16 Last updated: 2018-09-19Bibliographically approved
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