Scientific Results

Quantum Bubbles in Microgravity

Year: 2020

Authors: Tononi A, Cinti F., Salasnich L.

Autors Affiliation: Dipartimento di Fisica e Astronomia “Galileo Galilei,” Universit`a di Padova, via Marzolo 8, Padova 35131, Italy; Dipartimento di Fisica e Astronomia, Universit`a di Firenze, I-50019 Sesto Fiorentino (FI), Italy; INFN, Sezione di Firenze, I-50019 Sesto Fiorentino (FI), Italy; Department of Physics, University of Johannesburg, P.O. Box 524, Auckland Park 2006, South Africa; Istituto Nazionale di Ottica (INO) del Consiglio Nazionale delle Ricerche

Abstract: The recent developments of microgravity experiments with ultracold atoms have produced a relevant boost in the study of shell-shaped ellipsoidal Bose-Einstein condensates. For realistic bubble-trap parameters, here we calculate the critical temperature of Bose-Einstein condensation, which, if compared to the one of the bare harmonic trap with the same frequencies, shows a strong reduction. We simulate the zero-temperature density distribution with the Gross-Pitaevskii equation, and we study the free expansion of the hollow condensate. While part of the atoms expands in the outward direction, the condensate self-interferes inside the bubble trap, filling the hole in experimentally observable times. For a mesoscopic number of particles in a strongly interacting regime, for which more refined approaches are needed, we employ quantum Monte Carlo simulations, proving that the nontrivial topology of a thin shell allows superfluidity. Our work constitutes a reliable benchmark for the forthcoming scientific investigations with bubble traps.


Volume: 125 (1)      Pages from: 010402-1  to: 010402-6

KeyWords: Bose-Einstein condensation; ultracold atoms; bubble traps
DOI: 10.1103/PhysRevLett.125.010402

Citations: 6
data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2021-10-17
References taken from IsiWeb of Knowledge: (subscribers only)
Connecting to view paper tab on IsiWeb: Click here
Connecting to view citations from IsiWeb: Click here

This site uses cookies. If you decide to continue browsing we consider that you accept their use. For more information about cookies and how to delete them please read our Info Policy on cookies use.
Read more