Details
| Original language | English |
|---|---|
| Article number | 6908 |
| Journal | Scientific reports |
| Volume | 9 |
| Issue number | 1 |
| Early online date | 6 May 2019 |
| Publication status | E-pub ahead of print - 6 May 2019 |
Abstract
We derive the complete mixing-demixing phase-diagram relevant to a bosonic binary mixture confined in a ring trimer and modeled within the Bose-Hubbard picture. The mixing properties of the two quantum fluids, which are shown to be strongly affected by the fragmented character of the confining potential, are evaluated by means of a specific indicator imported from Statistical Thermodynamics and are shown to depend only on two effective parameters incorporating the asymmetry between the heteronuclear species. To closely match realistic experimental conditions, our study is extended also beyond the pointlike approximation of potential wells by describing the systems in terms of two coupled Gross-Pitaevskii equations. The resulting mean-field analysis confirms the rich scenario of mixing-demixing transitions of the mixture and also constitutes an effective springboard towards a viable experimental realization. We additionally propose an experimental realization based on a realistic optical-tweezers system and on the bosonic mixture 23 Na + 39 K, thanks to the large tunability of their intra- and inter-species scattering lengths.
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In: Scientific reports, Vol. 9, No. 1, 6908, 06.05.2019.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - The mixing-demixing phase diagram of ultracold heteronuclear mixtures in a ring trimer
AU - Richaud, Andrea
AU - Zenesini, Alessandro
AU - Penna, Vittorio
N1 - Funding information: A.R. and V.P. wish to thank Magnus Ögren and Edoardo Paganoni for their valuable help in the numerical methods. A.R. and A.Z wish to thank Luis Santos and Silke Ospelkaus for fruitful discussions. A.Z. gratefully acknowledges financial support from the European Research Council through ERC Starting Grant POLAR and from the Deutsche Forschungsgemeinschaft (DFG) through CRC 1227 (DQ-mat), project A03 and FOR2247, project E5.
PY - 2019/5/6
Y1 - 2019/5/6
N2 - We derive the complete mixing-demixing phase-diagram relevant to a bosonic binary mixture confined in a ring trimer and modeled within the Bose-Hubbard picture. The mixing properties of the two quantum fluids, which are shown to be strongly affected by the fragmented character of the confining potential, are evaluated by means of a specific indicator imported from Statistical Thermodynamics and are shown to depend only on two effective parameters incorporating the asymmetry between the heteronuclear species. To closely match realistic experimental conditions, our study is extended also beyond the pointlike approximation of potential wells by describing the systems in terms of two coupled Gross-Pitaevskii equations. The resulting mean-field analysis confirms the rich scenario of mixing-demixing transitions of the mixture and also constitutes an effective springboard towards a viable experimental realization. We additionally propose an experimental realization based on a realistic optical-tweezers system and on the bosonic mixture 23 Na + 39 K, thanks to the large tunability of their intra- and inter-species scattering lengths.
AB - We derive the complete mixing-demixing phase-diagram relevant to a bosonic binary mixture confined in a ring trimer and modeled within the Bose-Hubbard picture. The mixing properties of the two quantum fluids, which are shown to be strongly affected by the fragmented character of the confining potential, are evaluated by means of a specific indicator imported from Statistical Thermodynamics and are shown to depend only on two effective parameters incorporating the asymmetry between the heteronuclear species. To closely match realistic experimental conditions, our study is extended also beyond the pointlike approximation of potential wells by describing the systems in terms of two coupled Gross-Pitaevskii equations. The resulting mean-field analysis confirms the rich scenario of mixing-demixing transitions of the mixture and also constitutes an effective springboard towards a viable experimental realization. We additionally propose an experimental realization based on a realistic optical-tweezers system and on the bosonic mixture 23 Na + 39 K, thanks to the large tunability of their intra- and inter-species scattering lengths.
UR - http://www.scopus.com/inward/record.url?scp=85065337851&partnerID=8YFLogxK
U2 - 10.1038/s41598-019-43365-6
DO - 10.1038/s41598-019-43365-6
M3 - Article
C2 - 31061407
AN - SCOPUS:85065337851
VL - 9
JO - Scientific reports
JF - Scientific reports
SN - 2045-2322
IS - 1
M1 - 6908
ER -