Jul 17 – 22, 2022
Royal Conservatory of Music, Toronto
America/Toronto timezone

Dilute quantum liquid in a K-Rb Bose mixture

Jul 18, 2022, 5:00 PM
1h 30m
Hart House (Hart House)

Hart House

Hart House

7 Hart House Cir, Toronto, ON M5S 3H3
Poster presentation Degenerate gases, many-body physics, and quantum simulation Poster session


Recently, the formation of heteronuclear quantum droplets has been observed in an attractive bosonic mixture of $^{41}$K and $^{41}$Rb. [1], with increased lifetimes with respect to the homonuclear mixture of $^{39}$K. In order to enable fruitful comparison with experiments, we have performed a study of the $^{41}$K and $^{41}$Rb mixture using the diffusion Monte Carlo method and the Density Functional Theory [2].

We have proved that the perturbative Lee-Huang-Yang term for a heterogeneous mixture is valid only near the gas-liquid transition. Based on the equations of state of the bulk mixture, calculated with diffusion Monte Carlo, we present extensions to Lee-Huang-Yang corrected mean-field energy functionals.

Using Density Functional Theory, a systematic comparison between different functionals is performed, focusing on the critical atom number, surface tension, surface width, Tolman length, and compressibility. These results are given as a function of the inter-species interaction strength, within the stability domain of the liquid mixture and for an experimentally relevant range of scattering parameters.

[1] C. D’Errico, A. Burchianti, M. Prevedelli, L. Salasnich,F. Ancilotto, M. Modugno, F. Minardi, and C. Fort, Observation of quantum droplets in a heteronuclear bosonic mixture, Phys. Rev. Research 1, 033155 (2019).

[2] V. Cikojević, E. Poli, F. Ancilotto, L. Vranješ Markić, J. Boronat, Dilute quantum liquid in a K-Rb Bose mixture, Phys. Rev. A, 104, 033319 (2021).

Presenter name Leandra Vranjes Markic
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Primary authors

Prof. Leandra Vranjes Markic (University of Split, Faculty of Science) Dr Viktor Cikojević (University of Split, Faculty of Science) Elena Poli (Institut für Experimentalphysik, Universität Innsbruck,) Prof. Francesco Ancilotto (Dipartimento di Fisica e Astronomia "Galileo Galilei" and CNISM, Universita di Padova) Prof. Jordi Boronat (2Departament de Física, Universitat Politècnica de Catalunya)

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