Evolution from BCS to BEC Superfluidity in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi></mml:math>-Wave Fermi Gases

Iskin, M.; Melo, C. A. R. Sá de

doi:10.1103/physrevlett.96.040402

Cited by 87 publications

(99 citation statements)

References 19 publications

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“…Therefore, it is considered with confidence that the superfluidity emerges due to the formation of p-wave pairs in such a system. Furthermore, the tunability of p-wave interactions will enable exploration of the evolution of superfluid properties from a BEC of p-wave molecules to a BCS superfluid [9][10][11][12]. With precise control of experimental parameters and the capability of direct observation of the motions of single atoms through absorption imaging, we may be able to deepen our understanding of the microscopic mechanism of pair formation and the emergence of p-wave superfluidity in a strongly-interacting fermion system.…”

Section: Introductionmentioning

confidence: 99%

Experimental determination ofp-wave scattering parameters in ultracold6Li atoms

2013

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We report the experimental determination of the scattering parameters for a p-wave Feshbach resonance in a single component Fermi gas of 6 Li atoms in the lowest spin state. The time scale of the cross-dimensional relaxation reflects the elastic scattering rate of the atoms, and scattering parameters are determined from the scattering rate as a function of magnetic field by taking into account the momentum distribution and inhomogeneous density profile of the atoms in a trap. Precise determination of the scattering parameters for a p-wave Feshbach resonance is an important step toward the realization of a p-wave superfluid in an ultracold atomic gas.

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Section: Introductionmentioning

confidence: 99%

Experimental determination ofp-wave scattering parameters in ultracold6Li atoms

2013

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“…Though schematic, this model captures the basic physics of the BEC and BCS sides of the phase diagram and offers detailed insights into the phase transition mechanism. Previous studies concentrated on the standard mean field description [14][15][16][17] . The interesting point of the Hamiltonian in Eq.…”

Section: Introductionmentioning

confidence: 99%

Quantum phase diagram of the integrablepx+ipyfermionic superfluid

2010

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We determine the zero temperature quantum phase diagram of a px + ipy pairing model based on the exactly solvable hyperbolic Richardson-Gaudin model. We present analytical and large-scale numerical results for this model. In the continuum limit, the exact solution exhibits a third-order quantum phase transition, separating a strong-pairing from a weak-pairing phase. The mean field solution allows to connect these results to other models with px + ipy pairing order. We define an experimentally accessible characteristic length scale, associated with the size of the Cooper pairs, that diverges at the transition point, indicating that the phase transition is of a confinementdeconfinement type without local order parameter. We show that this phase transition is not limited to the px + ipy pairing model, but can be found in any representation of the hyperbolic RichardsonGaudin model and is related to a symmetry that is absent in the rational Richardson-Gaudin model.

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“…In this manuscript, we present a generalization of the zero and finite temperature analysis of both THS pseudo-spin singlet and SHS pseudo-spin triplet 37 superfluidity in 3D within a fermion-only description. Our main results are as follows.…”

Section: Introductionmentioning

confidence: 99%

“…At zero temperature (T = 0), we study the possibility of a topological quantum phase transition in ℓ = 0 atomic Fermi gases during the evolution from BCS to BEC regime 25,27,28,33,34,35,37,38 . We show that there is a fundamental difference between the ℓ = 0 and ℓ = 0 cases.…”

Section: Introductionmentioning

confidence: 99%

Nonzero orbital angular momentum superfluidity in ultracold Fermi gases

Iskin¹,

Melo

2006

Phys. Rev. A

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We analyze the evolution of superfluidity for nonzero orbital angular momentum channels from the Bardeen-Cooper-Schrieffer (BCS) to the Bose-Einstein condensation (BEC) limit in three dimensions. First, we analyze the low energy scattering properties of finite range interactions for all possible angular momentum channels. Second, we discuss ground state (T = 0) superfluid properties including the order parameter, chemical potential, quasiparticle excitation spectrum, momentum distribution, atomic compressibility, ground state energy and low energy collective excitations. We show that a quantum phase transition occurs for nonzero angular momentum pairing, unlike the s-wave case where the BCS to BEC evolution is just a crossover. Third, we present a gaussian fluctuation theory near the critical temperature (T = Tc), and we analyze the number of bound, scattering and unbound fermions as well as the chemical potential. Finally, we derive the time-dependent Ginzburg-Landau functional near Tc, and compare the Ginzburg-Landau coherence length with the zero temperature average Cooper pair size.

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Evolution from BCS to BEC Superfluidity inp-Wave Fermi Gases

Cited by 87 publications

References 19 publications

Experimental determination ofp-wave scattering parameters in ultracold6Li atoms

Experimental determination ofp-wave scattering parameters in ultracold6Li atoms

Quantum phase diagram of the integrablepx+ipyfermionic superfluid

Nonzero orbital angular momentum superfluidity in ultracold Fermi gases

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