Confinement and Lattice QuantumElectrodynamic Electric Flux Tubes Simulated with Ultracold Atoms
Abstract
We propose a method for simulating (2+1)D compact lattice quantumelectrodynamics, using ultracold atoms in optical lattices. In our model local BoseEinstein condensates’ (BECs) phases correspond to the electromagnetic vector potential, and the local number operators represent the conjugate electric field. The wellknown gaugeinvariant KogutSusskind Hamiltonian is obtained as an effective lowenergy theory. The field is then coupled to external static charges. We show that in the strong coupling limit this gives rise to “electric flux tubes” and to confinement. This can be observed by measuring the local density deviations of the BECs, and is expected to hold even, to some extent, outside the perturbative calculable regime.
 Publication:

Physical Review Letters
 Pub Date:
 December 2011
 DOI:
 10.1103/PhysRevLett.107.275301
 arXiv:
 arXiv:1108.1562
 Bibcode:
 2011PhRvL.107A5301Z
 Keywords:

 67.85.Hj;
 11.15.Ha;
 BoseEinstein condensates in optical potentials;
 Lattice gauge theory;
 Quantum Physics;
 Condensed Matter  Quantum Gases;
 High Energy Physics  Theory
 EPrint:
 Phys. Rev. Lett. 107, 275301 (2011)