Effective Control of Chemical Potentials by Rabi Coupling with RF-Fields in Ultracold Mixtures
We show that a linear term coupling the atoms of an ultracold binary mixture provides a simple method to induce an effective and tunable population imbalance between them. This term is easily realized by Rabi coupling between different hyperfine levels of the same atomic species. The resulting effec...
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doaj-909deaa013894209961836b74c9f426f2020-11-25T00:46:25ZengMDPI AGCondensed Matter2410-38962018-04-01321410.3390/condmat3020014condmat3020014Effective Control of Chemical Potentials by Rabi Coupling with RF-Fields in Ultracold MixturesLuca Lepori0Anna Maraga1Alessio Celi2Luca Dell’Anna3Andrea Trombettoni4Dipartimento di Scienze Fisiche e Chimiche, Università dell’Aquila, via Vetoio, I-67010 Coppito-L’Aquila, ItalySISSA, via Bonomea 265, I-34136 Trieste, ItalyInstitute for Quantum Optics and Quantum Information, Austrian Academy of Sciences, A-6020 Innsbruck, AustriaDipartimento di Fisica e Astronomia “Galileo Galilei”, Università di Padova, via Marzolo 8, I-35131 Padova, ItalySISSA, via Bonomea 265, I-34136 Trieste, ItalyWe show that a linear term coupling the atoms of an ultracold binary mixture provides a simple method to induce an effective and tunable population imbalance between them. This term is easily realized by Rabi coupling between different hyperfine levels of the same atomic species. The resulting effective imbalance holds for one-particle states dressed by the Rabi coupling and obtained by diagonalizing the mixing matrix of the Rabi term. This way of controlling the chemical potentials applies to both bosonic and fermionic atoms and it also allows for spatially- and temporally-dependent imbalances. As a first application, we show that, in the case of two attractive fermionic hyperfine levels with equal chemical potentials coupled by the Rabi pulse, the same superfluid properties of an imbalanced binary mixture are recovered. We finally discuss the properties of m-species mixtures in the presence of SU(m)-invariant interactions.http://www.mdpi.com/2410-3896/3/2/14quantum gasesmulticomponent mixturesrf-fieldsRabi couplingimbalanced mixtures |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Luca Lepori Anna Maraga Alessio Celi Luca Dell’Anna Andrea Trombettoni |
spellingShingle |
Luca Lepori Anna Maraga Alessio Celi Luca Dell’Anna Andrea Trombettoni Effective Control of Chemical Potentials by Rabi Coupling with RF-Fields in Ultracold Mixtures Condensed Matter quantum gases multicomponent mixtures rf-fields Rabi coupling imbalanced mixtures |
author_facet |
Luca Lepori Anna Maraga Alessio Celi Luca Dell’Anna Andrea Trombettoni |
author_sort |
Luca Lepori |
title |
Effective Control of Chemical Potentials by Rabi Coupling with RF-Fields in Ultracold Mixtures |
title_short |
Effective Control of Chemical Potentials by Rabi Coupling with RF-Fields in Ultracold Mixtures |
title_full |
Effective Control of Chemical Potentials by Rabi Coupling with RF-Fields in Ultracold Mixtures |
title_fullStr |
Effective Control of Chemical Potentials by Rabi Coupling with RF-Fields in Ultracold Mixtures |
title_full_unstemmed |
Effective Control of Chemical Potentials by Rabi Coupling with RF-Fields in Ultracold Mixtures |
title_sort |
effective control of chemical potentials by rabi coupling with rf-fields in ultracold mixtures |
publisher |
MDPI AG |
series |
Condensed Matter |
issn |
2410-3896 |
publishDate |
2018-04-01 |
description |
We show that a linear term coupling the atoms of an ultracold binary mixture provides a simple method to induce an effective and tunable population imbalance between them. This term is easily realized by Rabi coupling between different hyperfine levels of the same atomic species. The resulting effective imbalance holds for one-particle states dressed by the Rabi coupling and obtained by diagonalizing the mixing matrix of the Rabi term. This way of controlling the chemical potentials applies to both bosonic and fermionic atoms and it also allows for spatially- and temporally-dependent imbalances. As a first application, we show that, in the case of two attractive fermionic hyperfine levels with equal chemical potentials coupled by the Rabi pulse, the same superfluid properties of an imbalanced binary mixture are recovered. We finally discuss the properties of m-species mixtures in the presence of SU(m)-invariant interactions. |
topic |
quantum gases multicomponent mixtures rf-fields Rabi coupling imbalanced mixtures |
url |
http://www.mdpi.com/2410-3896/3/2/14 |
work_keys_str_mv |
AT lucalepori effectivecontrolofchemicalpotentialsbyrabicouplingwithrffieldsinultracoldmixtures AT annamaraga effectivecontrolofchemicalpotentialsbyrabicouplingwithrffieldsinultracoldmixtures AT alessioceli effectivecontrolofchemicalpotentialsbyrabicouplingwithrffieldsinultracoldmixtures AT lucadellanna effectivecontrolofchemicalpotentialsbyrabicouplingwithrffieldsinultracoldmixtures AT andreatrombettoni effectivecontrolofchemicalpotentialsbyrabicouplingwithrffieldsinultracoldmixtures |
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1725265689653018624 |