Effective<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mrow /><mml:mn>3</mml:mn></mml:msup></mml:math>He interactions in dilute<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mrow /><mml:mn>3</mml:mn></mml:msup></mml:math>He-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mrow /><mml:mn>4</mml:mn></mml:msup></mml:math>He mixtures

Rysti, J.; Tuoriniemi, Juha; Salmela, Anssi

doi:10.1103/physrevb.85.134529

Cited by 25 publications

(47 citation statements)

References 26 publications

(39 reference statements)

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“…The choices of the parameters in Eqs. (4) and (6) are consistent with the unitarity and the Lee-Yang-Huang limits [10,18,19], as well as the relevant results of the Monte Carlo calculations [20][21][22][23][24]. This phenomenological model is a variation of that in [25,26] and a generalization of that of a rotating singlecomponent BEC [15], and it has good predictive power [27].…”

Section: Modelsupporting

confidence: 78%

“…The initial ground-state order parameters ψ b (x,y,t = 0) and ψ p (x,y,t = 0) of the system can be obtained by the imaginary-time propagation method [29][30][31] based on the Peaceman-Rachford method [32,33]. Here we consider a superfluid 7 Li- 6 Li mixture in harmonic traps sat-…”

Section: Modelmentioning

confidence: 99%

“…By contrast, a superfluid Bose-Fermi mixture (SBFM) in ultracold atomic gases can be realized by using the combination of the Feshbach resonance and radio-frequency techniques. Most recently, a SBFM consisting of condensed 7 Li bosons and ultracold 6 Li fermions in two-spin states has been produced by Salomon's group [7]. The experimental breakthrough provides new opportunities to study the intriguing properties of SBFMs inaccessible in a Bose-Einstein condensate (BEC) with arbitrary spin [8,9], pure bosonic superfluid mixtures, and pure fermionic superfluid mixtures.…”

Section: Introductionmentioning

confidence: 99%

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Structure and dynamics of a rotating superfluid Bose-Fermi mixture

Wen

2014

Phys. Rev. A

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We investigate the structure and dynamics of a rotating superfluid Bose-Fermi mixture (SBFM) made of superfluid bosons and two-component (spin up and down) superfluid fermions. A ground-state phase diagram for the nonrotating case of a SBFM with specific parameters is given, where the ground-state configuration of a nonrotating SBFM is mainly determined by the boson-fermion interaction. For the rotating case of a SBFM with a sufficiently large rotation frequency, we show that the system supports a mixed phase and three typical layer separated phases. In particular, the visible vortex formation in the fermionic superfluid exhibits a remarkable hysteresis effect during the dynamical evolution of a rotating SBFM, which is evidently different from the case of rotating two-component Bose-Einstein condensates.Comment: 8 pages,6 figure

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Section: Modelsupporting

confidence: 78%

Section: Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Structure and dynamics of a rotating superfluid Bose-Fermi mixture

Wen

2014

Phys. Rev. A

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“…In order to compare this upper bound for the entropy with the measured equation of state at unitarity [S7], the measured homogeneous quantities must be converted to the trap-averaged ones. To do so, we use an interpolating function in between the data points from Li dual superfluid system in the vicinity of the 832 G Feshbach resonance in 6 Li. The magnetic field independent scattering lengths are aB = 106 a0 for Yb-Yb (blue) and aBF = 13 a0 for Yb-Li (green).…”

Section: Thermometrymentioning

confidence: 99%

Two-Element Mixture of Bose and Fermi Superfluids

et al. 2017

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We report on the production of a stable mixture of bosonic and fermionic superfluids composed of the elements 174 Yb and 6 Li which feature a strong mismatch in mass and distinct electronic properties. We demonstrate elastic coupling between the superfluids by observing the shift in dipole oscillation frequency of the bosonic component due to the presence of the fermions. The measured magnitude of the shift is consistent with a mean-field model and its direction determines the previously unknown sign of the interspecies scattering length to be positive. We also observe the exchange of angular momentum between the superfluids from the excitation of a scissors mode in the bosonic component through interspecies interactions. We explain this observation using an analytical model based on superfluid hydrodynamics.Ultracold atomic gases offer excellent opportunities to produce and investigate quantum matter, allowing fundamental studies in many-body physics and quantum simulation [1]. Beginning with the cooling of atoms to BoseEinstein condensation [2,3] and later followed by the achievement of superfluidity in atomic Fermi gases [4], such studies have found many parallels with the analogous superfluids of bosonic 4 He and fermionic 3 He as well as superconductors, familiar from condensed matter physics. While the goal of simultaneous superfluidity in mixtures of 4 He-3 He still remains elusive due to strong inter-isotope interactions [5,6], Bose-Fermi superfluidity in an atomic gas isotopic mixture of 7 Li-6 Li has recently been realized [7]. The original interest [8,9] in such dual superfluid systems is now strongly intensified [10][11][12][13][14][15][16].The extension of Bose-Fermi superfluidity to mixtures of different elements is experimentally challenging, but holds the potential to open a larger arena of scientific studies. A large mass ratio between the components is predicted to alter the interaction energy between the superfluids [12] as well as the character of excitations across the Bose-Einstein condensate to Bardeen-CooperSchreiffer (BEC-BCS) crossover for the fermion pairs [15]. Specific interaction strengths and mass ratios can aid the detection of exotic states such as the FuldeFerrell-Larkin-Ovchinnikov (FFLO) phase [10] and darkbright solitons [16]. Furthermore, species-selective potentials for relative positioning and selective addressing make two-element systems more amenable for systematic studies.In this paper, we report on the realization of a twoelement Bose-Fermi superfluid mixture of 174 Yb-6 Li. We measure their coupling by observing the interactioninduced frequency shift of the bosonic dipole mode. We also detect transfer of angular momentum between the superfluids through the excitation of a scissors mode in the bosonic component. The scattering length a F of the two-spin alkali 6 Li fermionic system is tunable across the BEC-BCS crossover through a Feshbach resonance centered at 832 G, while the scattering length a B of the alkaline-earth-like bosonic Yb remains constant throughout. The...

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“…168 Utilising a force balance equation to eliminate the vortex velocity in Eqn. (180), the macroscopic and mesoscopic coefficients can be related to each other. Therefore, R II and R II are controlled by B II and B II and vice versa, providing a possibility to constrain mesoscopic theoretical models with experimental data.…”

Section: Mutual Frictionmentioning

confidence: 99%

Neutron stars in the laboratory

Graber

Andersson

Hogg

2017

Int. J. Mod. Phys. D

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Neutron stars are astrophysical laboratories of many extremes of physics. Their rich phenomenology provides insights into the state and composition of matter at densities which cannot be reached in terrestrial experiments. Since the core of a mature neutron star is expected to be dominated by superfluid and superconducting components, observations also probe the dynamics of large-scale quantum condensates. The testing and understanding of the relevant theory tends to focus on the interface between the astrophysics phenomenology and nuclear physics. The connections with low-temperature experiments tend to be ignored. However, there has been dramatic progress in understanding laboratory condensates (from the different phases of superfluid helium to the entire range of superconductors and cold atom condensates). In this review, we provide an overview of these developments, compare and contrast the mathematical descriptions of laboratory condensates and neutron stars and summarise the current experimental state-of-the-art. This discussion suggests novel ways that we may make progress in understanding neutron star physics using low-temperature laboratory experiments.

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Effective3He interactions in dilute3He-4He mixtures

Cited by 25 publications

References 26 publications

Structure and dynamics of a rotating superfluid Bose-Fermi mixture

Structure and dynamics of a rotating superfluid Bose-Fermi mixture

Two-Element Mixture of Bose and Fermi Superfluids

Neutron stars in the laboratory

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