Department of Applied Science and Technology and u.d.r. CNISM, Politecnico di Torino, I-10129, Torino, Italy.
Department of Physics, Clark University, Worcester, Massachusetts, 01610, USA.
Sci Rep. 2017 Jul 11;7(1):5105. doi: 10.1038/s41598-017-05353-6.
Motivated by recent experiments and theoretical investigations on binary mixtures, we investigate the miscible-immiscible transition at finite temperature by means of Quantum Monte Carlo. Based on the observation that the segregated phase is strongly affected by temperature, we propose to use the degree of demixing for thermometry of a binary bosonic mixture trapped in an optical lattice. We show that the proposed method is especially sensitive at low temperatures, of the order of the tunnelling amplitude, and therefore is particularly suitable in the regime where quantum magnetism is expected.
受近期二元混合物实验和理论研究的启发，我们采用量子蒙特卡罗方法研究了有限温度下的混溶性-不混溶性转变。基于观察到分离相强烈受温度影响的结果，我们提出使用二元玻色混合物在光晶格中囚禁时的离析度来进行测温。我们表明，该方法在低温下（约等于隧道幅度）特别灵敏，因此特别适用于预期出现量子磁性的区域。
