Thermometry of bosonic mixtures in Optical Lattices via Demixing

Year: 2017

Authors: Lingua F., Capogrosso-Sansone B., Minardi F., Penna V.

Autors Affiliation: Politecn Torino, Dept Appl Sci & Technol, I-10129 Turin, Italy; Politecn Torino, Udr CNISM, I-10129 Turin, Italy; Clark Univ, Dept Phys, Worcester, MA 01610 USA; CNR, INO, I-50019 Sesto Fiorentino, Italy; Univ Florence, European Lab Nonlinear Spect LENS, I-50019 Sesto Fiorentino, Italy; Univ Florence, Dipartimento Fis, I-50019 Sesto Fiorentino, Italy.

Abstract: 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.

Journal/Review: SCIENTIFIC REPORTS

Volume: 7      Pages from: 5105-1  to: 5105-9

More Information: This work was supported by MIUR (PRIN 2010LLKJBX) and by the NSF (PIF-1552978). The computing for this project was performed at the OU Supercomputing Center for Education and Research (OSCER) at the University of Oklahoma (OU). F.M. acknowledges FP7 Cooperation STREP Project EQuaM (Grant no. 323714).
KeyWords: Quantum-gas microscope; Fermi-Hubbard model; Mott insulator; Atoms; State; Drug mixture; Low temperature; Magnetism; Miscibility; Theoretical model; Thermometry
DOI: 10.1038/s41598-017-05353-6

Citations: 6
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