The Condensed Fraction of a Homogeneous Dilute Bose Gas Within the Improved Hartree–Fock Approximation
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The Condensed Fraction of a Homogeneous Dilute Bose Gas Within the Improved Hartree–Fock Approximation. / Van Thu, Nguyen; Berx, Jonas.
I: Journal of Statistical Physics, Bind 188, Nr. 2, 16, 2022.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - The Condensed Fraction of a Homogeneous Dilute Bose Gas Within the Improved Hartree–Fock Approximation
AU - Van Thu, Nguyen
AU - Berx, Jonas
N1 - Funding Information: This research is funded by Vietnam National Foundation for Science and Technology Development (NAFOSTED) under grant number 103.01-2018.02. We are very grateful to M. Guilleumas for the useful conversations and to L. Raphael for extensive discussions about the experimental data. Publisher Copyright: © 2022, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.
PY - 2022
Y1 - 2022
N2 - Motivated by the recent experiment (Lopes et al. in Phys Rev Lett 119:190404, 2017) with a homogeneous Bose gas, we investigate a homogeneous dilute Bose gas to calculate the quantum depletion density. By means of the Cornwall–Jackiw–Tomboulis effective action approach within an improved Hartree–Fock approximation, the condensed fraction is recovered in an alternative theoretical approach and compared with corresponding findings in experimental data. A good agreement in the extremely small region of gas parameter is demonstrated. Furthermore, the ground state energy is also reattained and discussed.
AB - Motivated by the recent experiment (Lopes et al. in Phys Rev Lett 119:190404, 2017) with a homogeneous Bose gas, we investigate a homogeneous dilute Bose gas to calculate the quantum depletion density. By means of the Cornwall–Jackiw–Tomboulis effective action approach within an improved Hartree–Fock approximation, the condensed fraction is recovered in an alternative theoretical approach and compared with corresponding findings in experimental data. A good agreement in the extremely small region of gas parameter is demonstrated. Furthermore, the ground state energy is also reattained and discussed.
KW - Bose gas
KW - Condensed fraction
KW - Improved Hartree–Fock approximation
KW - Quantum depletion
U2 - 10.1007/s10955-022-02944-0
DO - 10.1007/s10955-022-02944-0
M3 - Journal article
AN - SCOPUS:85131717423
VL - 188
JO - Journal of Statistical Physics
JF - Journal of Statistical Physics
SN - 0022-4715
IS - 2
M1 - 16
ER -
ID: 371847588