Phase separation in binary Bose mixtures at finite temperature

Year: 2023

Authors: Spada G., Parisi L., Pascual G., Parker NG., Billam TP., Pilati S., Boronat J., Giorgini S.

Autors Affiliation: Univ Trento, Pitaevskii Ctr Bose Einstein Condensat, CNR INO, I-38123 Povo, Trento, Italy; Univ Trento, Dipartimento Fis, I-38123 Povo, Trento, Italy; Newcastle Univ, Joint Quantum Ctr JQC Durham Newcastle, Sch Math Stat & Phys, Newcastle Upon Tyne NE1 7RU, England; Univ Politecn Cataluna, Dept Fis & Engn Nucl, Campus Nord B4-B5, E-08034 Barcelona, Spain; Univ Camerino, Sch Sci & Technol, Phys Div, I-62032 Camerino, Italy; INFN, Sez Perugia, I-06123 Perugia, Italy.

Abstract: We investigate the magnetic behavior of finite-temperature repulsive two-component Bose mixtures by means of exact path-integral Monte-Carlo simulations. Novel algorithms are implemented for the free energy and the chemical potential of the two components. Results on the magnetic susceptibility suggest that the conditions for phase separation are not modified from the zero temperature case. This contradicts previous predictions based on approximate theories. We also determine the temperature dependence of the chemical potential and the contact parameters for experimentally relevant balanced mixtures.

Journal/Review: SCIPOST PHYSICS

Volume: 15 (4)      Pages from: 171-1  to: 171-19

More Information: This work was supported by the Italian Ministry of University and Research under the PRIN2017 project CEnTraL 20172H2SC4. S.P. acknowledges support from the PNRR MUR project PE0000023-NQSTI, and PRACE for awarding access to the Fenix Infrastructure resources at Cineca, which are partially funded from the European Union’s Horizon 2020 research and innovation programme through the ICEI project under the grant agreement No. 800858. J.B. and G. P. acknowledge financial support from Ministerio de Economia, Industria y Competitividad (MINECO, Spain) under grant No. PID2020-113565GB-C21. L.P, N.G.P and T.P.B acknowledge support from the UK Engineering and Physical Sciences Research Council (Grant No. EP/T015241/1) .
DOI: 10.21468/SciPostPhys.15.4.171

Citations: 3
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