Realization of fully frustrated Josephson-junction arrays with cold atoms.
Fully frustrated Josephson-junction arrays (FF-JJA's) exhibit a subtle compound phase transition in which an Ising transition associated with discrete broken translational symmetry and a Berezinskii-Kosterlitz-Thouless transition associated with quasi-long-range phase coherence occur nearly simultaneously. In this Letter we discuss a cold-atom realization of the FF-JJA system. We demonstrate that both orders can be studied by standard momentum-distribution-function measurements and present numerical results, based on a successful self-consistent spin-wave approximation, that illustrate the expected behavior of observables.
Polini
Marco
M
NEST-INFM and Classe di Scienze, Scuola Normale Superiore, I-56126 Pisa, Italy. m.polini@sns.it
Fazio
Rosario
R
MacDonald
A H
AH
Tosi
M P
MP