Naslov
Towards a quantum Monte Carlo-based density functional including finite-range effects: Excitation modes of a K-39 quantum droplet

Autori
Cikojević, Viktor ; Vranješ Markić, Leandra ; Pi, Maocai ; Barranco, Mercedes ; Boronat, Jordi

Izvornik
Physical review. A (2469-9926) 102 (2020), 3; 033335, 9

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Bose-Bose mixture ; Monte Carlo ; density functional ; excitation ; droplet

Sažetak
Some discrepancies between experimental results on quantum droplets made of a mixture of 39 K atoms in different hyperfine states and their analysis within extended Gross-Pitaevskii theory (which incorporates beyond mean-field corrections) have been recently solved by introducing finite-range effects into the theory. Here we study the influence of these effects on the monopole and quadrupole excitation spectrum of extremely dilute quantum droplets using a density functional built from first-principles quantum Monte Carlo calculations, which can be easily introduced in the existing Gross- Pitaevskii numerical solvers. Our results show differences of up to 20 % with those obtained within the extended Gross- Pitaevskii theory, likely providing another way to observe finite-range effects in mixed quantum droplets by measuring their lowest excitation frequencies.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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