2015/11/25 by David Raventós, Tobias Graß, Bruno Juliá-Díaz +3 · 10 citations
Mathematics · Physics and Astronomy · #Boson #Cold Atom Physics and Bose-Einstein Condensates #Field (mathematics) #Gauge boson #Gauge theory #Hamiltonian lattice gauge theory #Lattice (music) #Lattice field theory #Lattice gauge theory #Mathematics #Physics #Pure mathematics #Quantum many-body systems #Quantum mechanics #Theoretical physics #Topological Materials and Phenomena #Topology (electrical circuits) #cond-mat.quant-gas
paper · pdf · doi:10.1103/physreva.93.033605
published in Physical Review A 93(3) (American Physical Society) · 9 pages, 8 figures
arxiv created 2015/11/25 · openalex publication_date 2016/03/02 · arxiv updated 2016/03/09 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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.