Title:
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Topological phases of lattice bosons with a dynamical gauge field
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Author:
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Raventós i Ribera, David; Graß, Tobias; Juliá-Díaz, Bruno; Santos, Luis; Lewenstein, Maciej
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Other authors:
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Universitat de Barcelona |
Abstract:
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Optical lattices with a complex-valued tunneling term have become a standard way of studying gauge-field physics with cold atoms. If the complex phase of the tunneling is made density dependent, such a system features even a self-interacting or dynamical magnetic field. In this paper we study the scenario of a few bosons in either a static or a dynamical gauge field by means of exact diagonalization. The topological structures are identified computing their Chern number. Upon decreasing the atom-atom contact interaction, the effect of the dynamical gauge field is enhanced, giving rise to a phase transition between two topologically nontrivial phases. |
Subject(s):
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-Optoelectrònica -Òptica quàntica -Optoelectronics -Quantum optics |
Rights:
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(c) American Physical Society, 2016
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Document type:
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Article Article - Published version |
Published by:
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American Physical Society
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