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Volumn 323, Issue 12, 2008, Pages 2971-2986

Large momentum part of a strongly correlated Fermi gas

Author keywords

Adiabatic; BCS BEC crossover; BEC BCS crossover; Energy; Momentum distribution; Pressure

Indexed keywords


EID: 54849430750     PISSN: 00034916     EISSN: 1096035X     Source Type: Journal    
DOI: 10.1016/j.aop.2008.03.005     Document Type: Article
Times cited : (731)

References (54)
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    • * is introduced in [48] and is large near a narrow Feshbach resonance [48]. The results in this paper are not applicable to narrow Feshbach resonances under usual experimental conditions.
  • 2
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    • note
    • 2) ∼ 1 mK.
  • 3
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    • See e.g. in particular its footnote 31
    • See e.g. Viverit L., et al. Phys. Rev. A 69 (2004) 013607 in particular its footnote 31
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    • note
    • ↑ ↓ ∼ a.
  • 12
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    • note
    • As is well known, for ultracold atoms near a Feshbach resonance controlled by a magnetic field B, when B is tuned, 1 / a changes.
  • 13
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    • note
    • i 〉.
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    • note
    • Although such a pseudopotential was previously used [11,12] in the context of hard sphere interaction, it is a much better approximation for particles interacting with a large scattering length and a small interaction radius; in the limit of zero interaction radius (but a nonzero scattering length), this pseudopotential becomes exact.
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    • note
    • - (9 + 2 γ) at large k, and 9 + 2 γ ≥ 8.5454. Tiny clusters with more fermions contribute even weaker tails, because it is even less probable for more fermions to cluster in a tiny region.
  • 22
    • 54849407938 scopus 로고    scopus 로고
    • note
    • Of ultracold fermionic atoms with large scattering length, the "true" ground state is of course an uninteresting solid. The ground state referred to in this paper is physically a quasistable state, whose lifetime is shown by Petrov et al. [16] to be long because of Fermi statistics [16].
  • 24
  • 27
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    • and references therein
    • Ho T.L. Phys. Rev. Lett. 92 (2004) 090402 and references therein
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    • G.E. Astrakharchik et al., cond-mat/0507483.
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  • 35
  • 44
    • 54849434164 scopus 로고    scopus 로고
    • note
    • F {divides} a {divides})] (see, for example, [37]), but it does not affect the momentum distribution away from the Fermi surface appreciably, in the BCS limit.
  • 45
    • 54849437689 scopus 로고    scopus 로고
    • note
    • A practical caveat is that in the BEC limit, the many-body corrections to C [all terms after the first term on the right hand side of Eq. (23)] are small and difficult to detect in experiment.
  • 46
    • 2942592510 scopus 로고    scopus 로고
    • note
    • When s is large, high temperature expansion applies. See T.L. Ho, E.J. Mueller, Phys. Rev. Lett. 92 (2004) 160404. If we combine this approach with Eq. (1), we can also deduce a high temperature expansion [2] of C.
  • 47
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    • note
    • 0) from the s-wave contact interaction, but well-controlled corrections should be possible.
  • 48
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    • note
    • To change the system's scattering length, there must be some physical means. For ultracold atoms near a Feshbach resonance, we can, as is well known, achieve this by tuning the external magnetic field B. The system will absorb energy from the electromagnetic field or release energy to it when B is tuned, and the law of energy conservation will not be violated.
  • 49
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    • note
    • 2 / ℏ is of the order 1-10 ns.
  • 50
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    • note
    • 0 is broken.
  • 51
    • 0037061822 scopus 로고    scopus 로고
    • For a general fermionic system, the question whether momentum distribution is observable is raised by R.J. Furnstahl, H.-W. Hammer, Phys. Lett. B 531 (2002) 203.
    • For a general fermionic system, the question whether momentum distribution is observable is raised by R.J. Furnstahl, H.-W. Hammer, Phys. Lett. B 531 (2002) 203.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.