Polini Marco, Fazio Rosario, MacDonald A H, Tosi M P
NEST-INFM and Classe di Scienze, Scuola Normale Superiore, I-56126 Pisa, Italy.
Phys Rev Lett. 2005 Jul 1;95(1):010401. doi: 10.1103/PhysRevLett.95.010401. Epub 2005 Jun 27.
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.
完全受挫的约瑟夫森结阵列（FF-JJA）呈现出一种微妙的复合相变，其中与离散破缺平移对称性相关的伊辛相变和与准长程相位相干相关的贝雷津斯基-科斯特利茨- Thouless相变几乎同时发生。在这封信中，我们讨论了FF-JJA系统的冷原子实现。我们证明，这两种有序性都可以通过标准的动量分布函数测量来研究，并基于成功的自洽自旋波近似给出数值结果，这些结果说明了可观测量的预期行为。
