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Akademický článek

Imprinting Persistent Currents in Tunable Fermionic Rings

Autor: G. Del Pace, K. Xhani, A. Muzi Falconi, M. Fedrizzi, N. Grani, D. Hernandez Rajkov, M. Inguscio, F. Scazza, W. J. Kwon, G. Roati

Publikováno v: Physical Review X, Vol 12, Iss 4, p 041037 (2022)

Persistent currents in annular geometries have played an important role in disclosing the quantum phase coherence of superconductors and mesoscopic electronic systems. Ultracold atomic gases in multiply connected traps also exhibit long-lived supercu

Externí odkaz: https://doaj.org/article/20227d8f70fb4e8caf16869a55895a7f

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Sound emission and annihilations in a programmable quantum vortex collider

Autor: Woo Jin Kwon, K. Xhani, A. Muzi Falconi, Luca Galantucci, Massimo Inguscio, G. Roati, F. Scazza, G. Del Pace

Publikováno v: Nature. 600:64-69

In quantum fluids, the quantisation of circulation forbids the diffusion of a vortex swirling flow seen in classical viscous fluids. Yet, a quantum vortex accelerating in a superfluid may lose its energy into acoustic radiation, in a similar way an e

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::da6539899becffbbc33dcb4587308004
https://doi.org/10.1038/s41586-021-04047-4

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Akademický článek

Dynamical phase diagram of ultracold Josephson junctions

Autor: K Xhani, L Galantucci, C F Barenghi, G Roati, A Trombettoni, N P Proukakis

Publikováno v: New Journal of Physics, Vol 22, Iss 12, p 123006 (2020)

We provide a complete study of the phase diagram characterising the distinct dynamical regimes emerging in a three-dimensional Josephson junction in an ultracold quantum gas. Considering trapped ultracold superfluids separated into two reservoirs by

Externí odkaz: https://doaj.org/article/87f87e1a07f54700aabe154c29a9d989

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Akademický článek

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Akademický článek

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Akademický článek

Equation of state for a trapped quantum gas: remnant of zero-point energy effects

Autor: P C M Castilho, F J Poveda-Cuevas, J A Seman, R F Shiozaki, G Roati, S R Muniz, D V Magalhães, V S Bagnato

Publikováno v: New Journal of Physics, Vol 18, Iss 2, p 023014 (2016)

The study of the thermodynamic properties of trapped gases has attracted great attention during the last few years and can be used as a tool to characterize such clouds in the presence of other phenomena. Here, we obtain an equation of state for a ha

Externí odkaz: https://doaj.org/article/d888131e917b49b5b6e23fc7ccd48a01

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Experimental setup for the production of ultracold strongly correlated fermionic superfluids of Li-6

Autor: J. E. Padilla-Castillo, C. A. Gardea-Flores, D. Hernández-Rajkov, A. Gutiérrez-Valdés, R. A. Gutierrez-Arenas, M. Mendoza-López, R. Jauregui-Renaud, R. Colin-Rodriguez, S. A. Morales-Ramirez, F. J. Poveda-Cuevas, J. A. Seman, G. Roati

Publikováno v: Revista mexicana de física 66 (2020): 388–403. doi:10.31349/RevMexFis.66.388
info:cnr-pdr/source/autori:Hernandez-Rajkov, D.; Padilla-Castillo, J. E.; Mendoza-Lopez, M.; Colin-Rodriguez, R.; Gutierrez-Valdes, A.; Morales-Ramirez, S. A.; Gutierrez-Arenas, R. A.; Gardea-Flores, C. A.; Jauregui-Renaud, R.; Seman, J. A.; Poveda-Cuevas, F. J.; Roati, G./titolo:Experimental setup for the production of ultracold strongly correlated fermionic superfluids of Li-6/doi:10.31349%2FRevMexFis.66.388/rivista:Revista mexicana de física/anno:2020/pagina_da:388/pagina_a:403/intervallo_pagine:388–403/volume:66

We present our experimental setup to produce ultracold strongly correlated fermionic superfluids made of a two-component spin-mixture of $^6$Li atoms. Employing standard cooling techniques, we achieve quantum degeneracy in a single-beam optical dipol

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b719ba6a51135ddc7b9d1214a749921d
https://publications.cnr.it/doc/459248

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A compact experimental machine for studying tunable Bose-Bose superfluid mixtures

Autor: Kilvia Mayre Farias, Vanderlei Salvador Bagnato, Edwin Pedrozo-Peñafiel, E. M. Gutierrez, P. L. Mazo, P. C. M. Castilho, G. Roati

Publikováno v: Laser physics letters
16 (2019): 035501–035501. doi:10.1088/1612-202X/ab00fb
info:cnr-pdr/source/autori:Castilho, P. C. M.; Pedrozo-Penafiel, E.; Gutierrez, E. M.; Mazo, P. L.; Roati, G.; Farias, K. M.; Bagnato, V. S./titolo:A compact experimental machine for studying tunable Bose-Bose superfluid mixtures/doi:10.1088%2F1612-202X%2Fab00fb/rivista:Laser physics letters (Print)/anno:2019/pagina_da:035501/pagina_a:035501/intervallo_pagine:035501–035501/volume:16
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP

We present a compact and versatile experimental system for producing Bose-Bose superfluid mixtures composed of sodium and potassium atoms. The compact design combines the necessary ultra-high vacuum enviroment for ultracold atom experiments with effi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::157192d0ae5655657b6f82f97fa129a4
http://www.scopus.com/inward/record.url?eid=2-s2.0-85064940990&partnerID=q2rCbXpz

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Akademický článek

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Repulsive Fermi Polarons in a Resonant Mixture of Ultracold ^{6}Li Atoms

Autor: F, Scazza, G, Valtolina, P, Massignan, A, Recati, A, Amico, A, Burchianti, C, Fort, M, Inguscio, M, Zaccanti, G, Roati

Publikováno v: Physical review letters. 118(8)

We employ radio-frequency spectroscopy to investigate a polarized spin mixture of ultracold ^{6}Li atoms close to a broad Feshbach scattering resonance. Focusing on the regime of strong repulsive interactions, we observe well-defined coherent quasipa

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::bf8d81324bc4e43de6acebb2cd92a1bc
https://pubmed.ncbi.nlm.nih.gov/28282175

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