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We report on a study of the superfluid state of spin-polarized atomic Li6 confined in a magnetic trap. Density profiles of this degenerate Fermi gas, and the spatial distribution of the BCS order parameter are calculated in the local…

超导电性 · 物理学 2009-10-30 M. Houbiers , R. Ferwerda , H. T. C. Stoof , W. I. McAlexander , C. A. Sackett , R. G. Hulet

A coexistent phase of spin polarization and color superconductivity in high-density QCD is studied at zero temperature. The axial-vector self-energy stemming from the Fock exchange term of the one-gluon-exchange interaction has a central…

高能物理 - 唯象学 · 物理学 2008-11-26 Toshitaka Tatsumi , Tomoyuki Maruyama , Eiji Nakano

We consider a uniform dipolar Fermi gas in two-dimensions (2D) where the dipole moments of fermions are aligned by an orientable external field. We obtain the ground state of the gas in Hartree-Fock approximation and investigate RPA…

量子气体 · 物理学 2015-05-18 Yasuhiro Yamaguchi , Takaaki Sogo , Toru Ito , Takahiko Miyakawa

The possibility of effectively inverting the sign of the dipole-dipole interaction, by fast rotation of the dipole polarization, is examined within a harmonically trapped dipolar Bose-Einstein condensate. Our analysis is based on the…

量子物理 · 物理学 2019-02-13 S. B. Prasad , T. Bland , B. C. Mulkerin , N. G. Parker , A. M. Martin

We investigate the dynamical properties of a superfluid gas of trapped fermionic atoms in the BCS phase. As a simple example we consider the reaction of the gas to a slow rotation of the trap. It is shown that the currents generated by the…

其他凝聚态物理 · 物理学 2009-11-10 Michael Urban

We characterize the role of the spin-orbit coupling between electrons and the confining potential of the edge in nonequilibrium 2D homogeneous electronic gas. We derive a simple analytical result for the magnitude of the current induced…

介观与纳米尺度物理 · 物理学 2011-03-18 Peter Bokes , Frantisek Horvath

We consider spin transport in a two-component ultracold Fermi gas with attractive interspecies interactions close to the BCS pairing transition. In particular, we consider the spin-transport relaxation rate and the spin-diffusion constant.…

量子气体 · 物理学 2013-04-08 M. P. Mink , V. P. J. Jacobs , Marco Polini , G. Vignale , H. T. C. Stoof , R. A. Duine

A theory of mesoscopic fluctuations in disordered thin superconducting films in a parallel magnetic field is developed. At zero temperature, the superconducting state undergoes a phase transition into a state characterized by superfluid…

介观与纳米尺度物理 · 物理学 2009-10-31 Fei Zhou

We derive the density functional for the ground-state energy of a two-dimensional, spin-polarized gas of neutral fermionic atoms with magnetic-dipole interaction, in the Thomas-Fermi-Dirac approximation. For many atoms in a harmonic trap,…

量子气体 · 物理学 2015-05-19 Bess Fang , Berthold-Georg Englert

An unconventional superconducting phase is explored developing out of a non Fermi-liquid phase of the two-channel Anderson lattice model. It is characterized by a composite order parameter comprising of a local spin or orbital degree of…

强关联电子 · 物理学 2009-11-07 Frithjof B. Anders

We study trapping of a cold atom by a single vortex line in an extreme type II superconducting chip, allowing for pinning and friction. We evaluate the atom's spin flip rate and its dephasing due to the vortex fluctuations in equilibrium…

超导电性 · 物理学 2012-11-20 Amir Fruchtman , Baruch Horovitz

We introduce a spin-orbit coupling scheme, where a retro-reflected laser beam selectively diffracts two spin components in opposite directions. Spin sensitivity is provided by sweeping through a magnetic-field sensitive transition while…

We elucidate the itinerant ferromagnetism of a dipolar Fermi gas with a Raman-induced spin-orbit coupling by investigating the exotic phase diagrams at zero and finite temperature. It is revealed that the dipolar interaction along with…

量子气体 · 物理学 2022-06-15 Xue-Jing Feng , Xing-Dong Zhao , Wu-Ming Liu

Quantized vortices are the prototypical feature of superfluidity. Pervasive in all natural systems, vortices are yet to be observed in dipolar quantum gases. Here, we exploit the anisotropic nature of the dipole-dipole interaction of a…

Although recent theoretical and experimental progress have considerably clarified pairing mechanisms in spin 1/2 fermionic superfluid with equally populated internal states, many open questions remain when the two spin populations are…

统计力学 · 物理学 2016-08-14 Frédéric Chevy

An unbiased one-dimensional weak link between two terminals, subjected to the Rashba spin-orbit interaction caused by an AC electric field which rotates periodically in the plane perpendicular to the link, is shown to inject spin-polarized…

介观与纳米尺度物理 · 物理学 2019-09-11 M. Jonson , R. I. Shekhter , O. Entin-Wohlman , A. Aharony , H. C. Park , D. Radić

In underdoped cuprates fluctuations of the phase of the superconducting order parameter play a role due to the small superfluid density. We consider the effects of phase fluctuations assuming the exchange of spin fluctuations to be the…

超导电性 · 物理学 2009-11-07 C. Timm , D. Manske , K. H. Bennemann

We consider a weakly interacting two-component Fermi gas of dipolar particles (magnetic atoms or polar molecules) in the two-dimensional geometry. The dipole-dipole interaction (together with the short-range interaction at Feshbach…

超导电性 · 物理学 2020-11-25 S. I. Matveenko , V. I. Yudson , B. L. Altshuler , G. V. Shlyapnikov

We report the observation of vorticity in a macroscopic Bose-Einstein condensate of polaritons in a ring geometry. Because it is a spinor condensate, the elementary excitations are "half vortices" in which there is a phase rotation of $\pi$…

量子气体 · 物理学 2015-02-24 Gangqiang Liu , David W. Snoke , Andrew Daley , Loren Pfeiffer , Kenneth West

We calculate the effects of two-body interactions on the low frequency oscillations of a normal Fermi gas confined in a harmonic trap. The mean field contribution to the collective frequencies is evaluated in the collisionless regime using…

凝聚态物理 · 物理学 2009-10-31 L. Vichi , S. Stringari