Non-Galilean response of Rashba-coupled Fermi gases

Maldonado-Mundo, Daniel; He, Lianyi; Öhberg, Patrik; Valiente, Manuel

doi:10.1103/physreva.88.053609

Cited by 3 publications

(5 citation statements)

References 56 publications

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“…These simple systems present a new path for exploring the FFLO finite-momentum paired states [283][284][285][286][287]. Finally, we note that finite-momentum ground-states can be generated in Rashba-coupled Fermi gases also in the absence of a Zeeman splitting term, provided that the collisional interaction is strong enough [231].…”

Section: Interacting Fermi Gases With Socmentioning

confidence: 81%

“…Implementation of the 2D or 3D Rashba SOC would allow for the study of rich ground state physics proposed in systems of manybody fermions [56,218,[221][222][223][224][225][226][227][228][229][230][231] and bosons [130,165,219,[232][233][234][235][236][237][238][239][240][241], of which many properties have no solid-state physics analogue. This will be considered in the next Section.…”

Section: Experimental Realisation Of Spin-orbit Couplingmentioning

confidence: 99%

“…Up to now only a 1D SOC corresponding Abelian gauge potential has been generated [25][26][27][28][29][30][31][32]127] in spite of numerous proposal for creating the 2D [55, 80, 119, 162-169, 203, 204, 216-219] and 3D [203,220] Rashba type SOC in cold atomic gases. Implementation of the 2D or 3D Rashba SOC would allow for the study of rich ground state physics proposed in systems of many-body fermions [56,218,[221][222][223][224][225][226][227][228][229][230][231] and bosons [130,165,219,[232][233][234][235][236][237][238][239][240][241], of which many properties have no solid-state physics analog. This will be considered in the next section.…”

Section: Experimental Realization Of Socmentioning

confidence: 99%

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Light-induced gauge fields for ultracold atoms

et al. 2014

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Abstract. Gauge fields are central in our modern understanding of physics at all scales. At the highest energy scales known, the microscopic universe is governed by particles interacting with each other through the exchange of gauge bosons. At the largest length scales, our universe is ruled by gravity, whose gauge structure suggests the existence of a particle -the graviton-that mediates the gravitational force. At the mesoscopic scale, solid-state systems are subjected to gauge fields of different nature: materials can be immersed in external electromagnetic fields, but they can also feature emerging gauge fields in their low-energy description. In this review, we focus on another kind of gauge field: those engineered in systems of ultracold neutral atoms. In these setups, atoms are suitably coupled to laser fields that generate effective gauge potentials in their description. Neutral atoms "feeling" laser-induced gauge potentials can potentially mimic the behavior of an electron gas subjected to a magnetic field, but also, the interaction of elementary particles with non-Abelian gauge fields. Here, we review different realized and proposed techniques for creating gauge potentials -both Abelian and non-Abelian -in atomic systems and discuss their implication in the context of quantum simulation. While most of these setups concern the realization of background and classical gauge potentials, we conclude with more exotic proposals where these synthetic fields might be made dynamical, in view of simulating interacting gauge theories with cold atoms.arXiv:1308.6533v3 [cond-mat.quant-gas]

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Section: Interacting Fermi Gases With Socmentioning

confidence: 81%

Section: Experimental Realisation Of Spin-orbit Couplingmentioning

confidence: 99%

Section: Experimental Realization Of Socmentioning

confidence: 99%

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Light-induced gauge fields for ultracold atoms

et al. 2014

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“…In the few-body community there has also been a flurry of activity in spinorbit coupled systems with its non-trivial dispersion. In particular, the scattering properties have been discussed recently [43][44][45][46][47][48] as well as the effects of spin-orbit coupling on systems that are in a harmonic trap [49][50][51][52][53][54]. Furthermore, the three-body physics of these systems has also been found to be very rich [55][56][57].…”

Section: Introductionmentioning

confidence: 99%

Quantum collision theory in flat bands

Valiente

Zinner

2017

J. Phys. B: At. Mol. Opt. Phys.

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We consider quantum scattering of particles in media exhibiting strong dispersion degeneracy. In particular, we study flat-banded lattices and linearly dispersed energy bands. The former constitute a prime example of single-particle frustration while the latter show degeneracy at the few-and manyparticle level. We investigate both impurity and two-body scattering and show that, quite generally, scattering does not occur, which we relate to the fact that transition matrices vanish on the energy shell. We prove that scattering is instead replaced by projections onto band-projected eigenstates of the interaction potential. We then use the general results to obtain localised flat band states that are eigenstates of impurity potentials with vanishing eigenvalues in one-dimensional flat bands and study the particular case of a sawtooth lattice. We also uncover the relation between certain solutions of one-dimensional systems that have been categorised as "strange", and the scattering states in linearly dispersed continuum systems.

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“…Thirdly, for certain symmetric spin-orbit coupling, of Rashba or Weyl form, the low energy density of states is significantly enhanced such that the effects of interaction have drastic effects on the existence of Bose condensate and could in fact destroy its existence [40,41]. Lastly, the inclusion of spin-orbit coupling breaks the Galilean invariance which makes the construction of two-fluid model much more involved [42][43][44][45].…”

Section: Introductionmentioning

confidence: 99%

Evidence for correlated states in a cluster of bosons with Rashba spin-orbit coupling

Zhang

2016

New J. Phys.

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We study the ground state properties of spin-half bosons subjected to the Rashba spin-orbit coupling in two dimensions. Due to the enhancement of the low energy density of states, it is expected that the effect of interaction becomes more important. After reviewing several possible ideal condensed states, we carry out an exact diagonalization calculation for a cluster of the bosons in the presence of strong spin-orbit coupling on a two-dimensional disk and reveal strong correlations in its ground state. We derive a low-energy effective Hamiltonian to understand how states with strong correlations become energetically more favorable than the ideal condensed states.

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Non-Galilean response of Rashba-coupled Fermi gases

Cited by 3 publications

References 56 publications

Light-induced gauge fields for ultracold atoms

Light-induced gauge fields for ultracold atoms

Quantum collision theory in flat bands

Evidence for correlated states in a cluster of bosons with Rashba spin-orbit coupling

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