Self-Bound Quantum Droplets of Atomic Mixtures in Free Space
| Autor: | Louise Wolswijk, Massimo Inguscio, G. Ferioli, Giulia Semeghini, Francesco Minardi, Giovanni Modugno, C. Mazzinghi, Marco Fattori, Michele Modugno, L. Masi |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Physics
Condensed Matter::Quantum Gases Work (thermodynamics) General Physics and Astronomy Bose-Einstein condensates Context (language use) 01 natural sciences 010305 fluids & plasmas Superfluidity Ultracold atom Phase (matter) 0103 physical sciences Atomic physics 010306 general physics Quantum Excitation Quantum fluctuation |
| Zdroj: | Physical review letters 120 (2018): 235301-1–235301-5. doi:10.1103/PhysRevLett.120.235301 info:cnr-pdr/source/autori:Semeghini, G.; Ferioli, G.; Masi, L.; Mazzinghi, C.; Wolswijk, L.; Minardi, F.; Modugno, M.; Modugno, G.; Inguscio, M.; Fattori, M./titolo:Self-Bound Quantum Droplets of Atomic Mixtures in Free Space/doi:10.1103%2FPhysRevLett.120.235301/rivista:Physical review letters (Print)/anno:2018/pagina_da:235301-1/pagina_a:235301-5/intervallo_pagine:235301-1–235301-5/volume:120 Physical Review Letters |
| ISSN: | 0031-9007 |
| DOI: | 10.1103/PhysRevLett.120.235301 |
| Popis: | Self-bound quantum droplets are a newly discovered phase in the context of ultracold atoms. In this Letter, we report their experimental realization following the original proposal by Petrov [Phys. Rev. Lett. 115, 155302 (2015)PRLTAO0031-900710.1103/PhysRevLett.115.155302], using an attractive bosonic mixture. In this system, spherical droplets form due to the balance of competing attractive and repulsive forces, provided by the mean-field energy close to the collapse threshold and the first-order correction due to quantum fluctuations. Thanks to an optical levitating potential with negligible residual confinement, we observe self-bound droplets in free space, and we characterize the conditions for their formation as well as their size and composition. This work sets the stage for future studies on quantum droplets, from the measurement of their peculiar excitation spectrum to the exploration of their superfluid nature. |
| Databáze: | OpenAIRE |
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