Dilute Fluid Governed by Quantum Fluctuations

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Dilute Fluid Governed by Quantum Fluctuations. / Jørgensen, Nils Byg; Bruun, Georg; Arlt, Jan.

In: Physical Review Letters, Vol. 121, No. 17, 173403, 26.10.2018.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

Harvard

Jørgensen, NB, Bruun, G & Arlt, J 2018, 'Dilute Fluid Governed by Quantum Fluctuations', Physical Review Letters, vol. 121, no. 17, 173403. https://doi.org/10.1103/PhysRevLett.121.173403

APA

CBE

Jørgensen NB, Bruun G, Arlt J. 2018. Dilute Fluid Governed by Quantum Fluctuations. Physical Review Letters. 121(17):Article 173403. https://doi.org/10.1103/PhysRevLett.121.173403

MLA

Vancouver

Author

Jørgensen, Nils Byg ; Bruun, Georg ; Arlt, Jan. / Dilute Fluid Governed by Quantum Fluctuations. In: Physical Review Letters. 2018 ; Vol. 121, No. 17.

Bibtex

@article{1da20cdde673411a84ac839dc0c28604,
title = "Dilute Fluid Governed by Quantum Fluctuations",
abstract = "Understanding the effects of interactions in complex quantum systems beyond the mean-field paradigm constitutes a fundamental problem in physics. We show how the atom numbers and interactions in a Bose-Bose mixture can be tuned to cancel mean-field interactions completely. The resulting system is entirely governed by quantum fluctuations—specifically the Lee-Huang-Yang correlations. We derive an effective one-component Gross-Pitaevskii equation for this system, which is shown to be very accurate by comparison with a full two-component description. This allows us to show how the Lee-Huang-Yang correlation energy can be accurately measured using two powerful probes of atomic gases: collective excitations and radio-frequency spectroscopy. Importantly, the behavior of the system is robust against deviations from the atom number and interaction criteria for canceling the mean-field interactions. This shows that it is feasible to realize a setting where quantum fluctuations are not masked by mean-field forces, allowing investigations of the Lee-Huang-Yang correction at unprecedented precision.",
author = "J{\o}rgensen, {Nils Byg} and Georg Bruun and Jan Arlt",
year = "2018",
month = oct,
day = "26",
doi = "10.1103/PhysRevLett.121.173403",
language = "English",
volume = "121",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "AMER PHYSICAL SOC",
number = "17",

}

RIS

TY - JOUR

T1 - Dilute Fluid Governed by Quantum Fluctuations

AU - Jørgensen, Nils Byg

AU - Bruun, Georg

AU - Arlt, Jan

PY - 2018/10/26

Y1 - 2018/10/26

N2 - Understanding the effects of interactions in complex quantum systems beyond the mean-field paradigm constitutes a fundamental problem in physics. We show how the atom numbers and interactions in a Bose-Bose mixture can be tuned to cancel mean-field interactions completely. The resulting system is entirely governed by quantum fluctuations—specifically the Lee-Huang-Yang correlations. We derive an effective one-component Gross-Pitaevskii equation for this system, which is shown to be very accurate by comparison with a full two-component description. This allows us to show how the Lee-Huang-Yang correlation energy can be accurately measured using two powerful probes of atomic gases: collective excitations and radio-frequency spectroscopy. Importantly, the behavior of the system is robust against deviations from the atom number and interaction criteria for canceling the mean-field interactions. This shows that it is feasible to realize a setting where quantum fluctuations are not masked by mean-field forces, allowing investigations of the Lee-Huang-Yang correction at unprecedented precision.

AB - Understanding the effects of interactions in complex quantum systems beyond the mean-field paradigm constitutes a fundamental problem in physics. We show how the atom numbers and interactions in a Bose-Bose mixture can be tuned to cancel mean-field interactions completely. The resulting system is entirely governed by quantum fluctuations—specifically the Lee-Huang-Yang correlations. We derive an effective one-component Gross-Pitaevskii equation for this system, which is shown to be very accurate by comparison with a full two-component description. This allows us to show how the Lee-Huang-Yang correlation energy can be accurately measured using two powerful probes of atomic gases: collective excitations and radio-frequency spectroscopy. Importantly, the behavior of the system is robust against deviations from the atom number and interaction criteria for canceling the mean-field interactions. This shows that it is feasible to realize a setting where quantum fluctuations are not masked by mean-field forces, allowing investigations of the Lee-Huang-Yang correction at unprecedented precision.

U2 - 10.1103/PhysRevLett.121.173403

DO - 10.1103/PhysRevLett.121.173403

M3 - Journal article

C2 - 30411960

VL - 121

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 17

M1 - 173403

ER -