Topological properties of a dense atomic lattice gas [dataset]

Minar, Jiri (Nottingham University, UK); Adams, Charles S. (Durham University, UK); Bettles, Robert J. (Durham University, UK); Olmos, Beatriz (Nottingham University, UK); Lesanovsky, Igor (Nottingham University, UK)

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Topological properties of a dense atomic lattice gas [dataset] Open Access

We investigate the existence of topological phases in a dense two-dimensional atomic lattice gas. The coupling of the atoms to the radiation field gives rise to dissipation and a nontrivial coherent long-range exchange interaction whose form goes beyond a simple power law. The far-field terms of the potential—which are particularly relevant for atomic separations comparable to the atomic transition wavelength—can give rise to energy spectra with one-sided divergences in the Brillouin zone. The long-ranged character of the interactions has another important consequence: it can break the standard bulk-boundary relation in topological insulators. We show that topological properties such as the transport of an excitation along the edge of the lattice are robust with respect to the presence of lattice defects and dissipation. The latter is of particular relevance as dissipation and coherent interactions are inevitably connected in our setting.

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Resource type: Dataset
Contributors: Creator: Bettles, Robert J. ¹
Contact person: Bettles, Robert J. ¹
Creator: Minar, Jiri ²
Creator: Adams, Charles S. ¹
Creator: Lesanovsky, Igor ²
Creator: Olmos, Beatriz ²
Contact person: Olmos, Beatriz ²

¹ Durham University, UK
² Nottingham University, UK
Funder: Engineering and Physical Sciences Research Council
European Research Council
Royal Society
H2020-FETPROACT-2014-640378-RYSQ
Research methods
Other description
Keyword: Topological Insulators
Atomic Lattices
Physics
Subject
Location
Language
Cited in: https://link.aps.org/doi/10.1103/PhysRevA.96.041603
Identifier: ark:/32150/r14x51hj02r
doi:10.15128/r14x51hj02r
Publisher: Durham University
Date Created

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Depositor: R.J. Bettles
Date Uploaded: 12 August 2018, 16:08:04
Date Modified: 13 August 2018, 12:08:51
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