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Title: Topological phases of lattice bosons with a dynamical gauge field
Author: Raventós i Ribera, David
Graß, Tobias
Juliá-Díaz, Bruno
Santos, Luis
Lewenstein, Maciej
Keywords: Optoelectrònica
Òptica quàntica
Quantum optics
Issue Date: 2-Mar-2016
Publisher: American Physical Society
Abstract: 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.
Note: Reproducció del document publicat a:
It is part of: Physical Review A, 2016, vol. 93, num. 3, p. 033605-1-033605-8
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ISSN: 1050-2947
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)
Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))

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