Attractive Solution of Binary Bose Mixtures: Liquid-Vapor Coexistence and Critical Point

Year: 2023

Authors: Spada G., Pilati S., Giorgini S.

Autors Affiliation: Univ Trento, Pitaevskii Ctr Bose Einstein Condensat, CNR INO, I-38123 Trento, Italy; Univ Trento, Dipartimento Fis, I-38123 Trento, Italy; Univ Camerino, Sch Sci & Technol, Phys Div, I-62032 Camerino, Italy; Ist Nazl Fis Nucl, Sez Perugia, I-06123 Perugia, Italy.

Abstract: We study the thermodynamic behavior of attractive binary Bose mixtures using exact path-integral Monte Carlo methods. Our focus is on the regime of interspecies interactions where the ground state is in a self-bound liquid phase, stabilized by beyond mean-field effects. We calculate the isothermal curves in the pressure vs density plane for different values of the attraction strength and establish the extent of the coexistence region between liquid and vapor using the Maxwell construction. Notably, within the coexistence region, Bose-Einstein condensation occurs in a discontinuous way as the density jumps from the normal gas to the superfluid liquid phase. Furthermore, we determine the critical point where the line of first-order transition ends and investigate the behavior of the density discontinuity in its vicinity. We also point out that the density discontinuity at the transition could be observed in experiments of mixtures in traps.

Journal/Review: PHYSICAL REVIEW LETTERS

Volume: 131 (17)      Pages from: 173404-1  to: 173404-6

More Information: We acknowledge the Italian Ministry of University and Research under the PRIN2017 project CEnTraL 20172H2SC4. G. S. and S. G. also acknowledge funding from the Provincia Autonoma di Trento. S. P. acknowledges support from the PNRR MUR project PE0000023-NQSTI and from the CINECA awards IsCa6_NEMCAQS and IsCb2_NEMCASRA, for the availability of high performance computing resources and support. G. S. acknowledges the CINECA award IsCa8_QuaLiT under the ISCRA initiative, for the availability of high performance computing resources and support. S. G. acknowledges support from ICSC – Centro Nazionale di Ricerca in HPC, Big Data and Quantum Computing, funded by the European Union under NextGenerationEU. Views and opinions expressed are, however, those of the author (s) only and do not necessarily reflect those of the European Union or The European Research Executive Agency. Neither the European Union nor the granting authority can be held responsible for them.
KeyWords: Quantum; Transition; Droplets; Gas
DOI: 10.1103/PhysRevLett.131.173404

Citations: 6
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