Temperature-dependent density profiles of trapped boson-fermion mixtures

Amoruso, M.; Minguzzi, Anna; Stringari, S.; Tosi, M. P.; Vichi, L.

doi:10.1007/s100530050207

Cited by 59 publications

(5 citation statements)

References 19 publications

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“…This considerably simplifies the possible signatures of a superfluid phase transition in a Fermi gas. For instance it should possible to look at a bulge in the density distribution as predicted in [46], since this is obtained admist a smooth, low density and well controllable thermal cloud instead of a higher density and peaked condensate [86]. The presence of a superfluid state could be evidenced also by using the same blue-detuned beam as a mechanical stirrer for the fermion cloud.…”

Section: Sympathetic Cooling and Possible Evidences For A Fermionic S...mentioning

confidence: 97%

Ultracold Atomic Fermi–Bose Mixtures in Bichromatic Optical Dipole Traps: A Novel Route to Study Fermion Superfluidity

Onofrio

Presilla

2004

Journal of Statistical Physics

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The study of low density, ultracold atomic Fermi gases is a promising avenue to understand fermion superfluidity from first principles. One technique currently used to bring Fermi gases in the degenerate regime is sympathetic cooling through a reservoir made of an ultracold Bose gas. We discuss a proposal for trapping and cooling of two-species Fermi-Bose mixtures into optical dipole traps made from combinations of laser beams having two different wavelengths. In these bichromatic traps it is possible, by a proper choice of the relative laser powers, to selectively trap the two species in such a way that fermions experience a stronger confinement than bosons. As a consequence, a deep Fermi degeneracy can be reached having at the same time a softer degenerate regime for the Bose gas. This leads to an increase in the sympathetic cooling efficiency and allows for higher precision thermometry of the Fermi-Bose mixture.

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Section: Sympathetic Cooling and Possible Evidences For A Fermionic S...mentioning

confidence: 97%

Ultracold Atomic Fermi–Bose Mixtures in Bichromatic Optical Dipole Traps: A Novel Route to Study Fermion Superfluidity

Onofrio

Presilla

2004

Journal of Statistical Physics

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“…A thorough stability consideration was made for the homogeneous case [28] but has not been generalized to trapped systems yet. Finally, the influence of finite temperature [29,30] and beyond mean-field effects [31][32][33][34] have also been investigated.…”

Section: The Richness Of Bose-fermi Mixturesmentioning

confidence: 99%

Comprehensive classification for Bose–Fermi mixtures

et al. 2017

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We present analytical studies of a trapped boson-fermion mixture at zero temperature with spinpolarized fermions. Using the Thomas-Fermi approximation for bosons and the local-density approximation for fermions, we find a large variety of different density shapes. In the case of continuous density, we obtain analytic conditions for each configuration for attractive as well as repulsive boson-fermion interaction. Furthermore, we analytically show that all the scenarios we describe are minima of the grand-canonical energy functional. Finally, we provide a full classification of all possible ground states in the interpenetrative regime. Our results also apply to binary mixtures of bosons.

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“…The stability conditions for uniform mixtures have been studied in three-dimension [21] and in mixed dimensions [22]. Finite-temperature effects have been included by using semiclassical approximations to find the density profiles [23,24]. There are proposals of using atomic Bose-Fermi mixtures to simulate supersymmetry [25,26] and quantum chromodynamics [27] systems.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamics and structural transition of binary atomic Bose-Fermi mixtures in box or harmonic potentials: A path-integral study

Kim

Chien

2018

Phys. Rev. A

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Experimental realizations of a variety of atomic binary Bose-Fermi mixtures have brought opportunities for studying composite quantum systems with different spin-statistics. The binary atomic mixtures can exhibit a structural transition from a mixture into phase separation as the boson-fermion interaction increases. By using a path-integral formalism to evaluate the grand partition function and thermodynamic grand potential, we obtain the effective potential of binary Bose-Fermi mixtures. Thermodynamic quantities in a broad range of temperatures and interactions are also derived. The structural transition can be identified as a loop of the effective potential curve, and the volume fraction of phase separation can be determined by the lever rule. For 6 Li-7 Li and 6 Li-41 K mixtures, we present the phase diagrams of the mixtures in a box potential at zero and finite temperatures. Due to the flexible densities of atomic gases, the construction of phase separation is more complicated when compared to conventional liquid or solid mixtures where the individual densities are fixed. For harmonically trapped mixtures, we use the local density approximation to map out the finite-temperature density profiles and present typical trap structures, including the mixture, partially separated phases, and fully separated phases. arXiv:1802.06510v1 [cond-mat.quant-gas]

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Temperature-dependent density profiles of trapped boson-fermion mixtures

Cited by 59 publications

References 19 publications

Ultracold Atomic Fermi–Bose Mixtures in Bichromatic Optical Dipole Traps: A Novel Route to Study Fermion Superfluidity

Ultracold Atomic Fermi–Bose Mixtures in Bichromatic Optical Dipole Traps: A Novel Route to Study Fermion Superfluidity

Comprehensive classification for Bose–Fermi mixtures

Thermodynamics and structural transition of binary atomic Bose-Fermi mixtures in box or harmonic potentials: A path-integral study

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