Collective excitation of a trapped Bose-Einstein condensate with spin-orbit coupling

Chen, Li; Pu, Han; Zhang, Yunbo

doi:10.1103/physreva.95.033616

Cited by 26 publications

(22 citation statements)

References 34 publications

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“…Similar dispersion laws have been obtained in Ref. [39] by solving the Bogoliubov equations for a spin-orbit-coupled mixture in one dimension. With respect to Ref.…”

supporting

confidence: 83%

Exciting the Goldstone Modes of a Supersolid Spin-Orbit-Coupled Bose Gas

Geier,

Martone,

Hauke

et al. 2021

Preprint

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“…Similar dispersion laws have been obtained in Ref. [39] by solving the Bogoliubov equations for a spin-orbit-coupled mixture in one dimension. With respect to Ref.…”

supporting

confidence: 83%

Exciting the Goldstone Modes of a Supersolid Spin-Orbit-Coupled Bose Gas

Geier,

Martone,

Hauke

et al. 2021

Preprint

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“…It is important to note that for stronger interspecies interaction, U ↑↓ /U > 1, we do not observe the ST phase. This is consistent to the quantum phases of continuum system with SOC where the tuning of Raman coupling for strong interspecies interaction does not lead to ST phase [38].…”

Section: (B)-(c)supporting

confidence: 87%

“…In particular, they show stripe-like distributions in the lattice. It is worth mentioning, similar SF states have been previously discussed in the continuum where the phases were characterized using the properties of collective excitations [38].…”

Section: Quantum Phases and Order Parametersmentioning

confidence: 81%

Spin-orbit-coupling-driven superfluid states in optical lattices at zero and finite temperatures

et al. 2021

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We investigate the quantum phase transitions of a two-dimensional Bose-Hubbard model with Rashba spinorbit coupling with and without thermal fluctuations. The interplay of the single-particle hopping, the strength of spin-orbit coupling and interspecies interaction leads to superfluid phases with distinct properties. With interspecies interactions weaker than intraspecies, at lower hopping strengths, the spin-orbit coupling induces the finite momentum phase-twisted superfluid phase and reduces the domain of insulating phase. At higher hopping strengths, the modulation in the density and phase favours stripe superfluid. A further increase in the hopping strength damps the density modulations, and the system exhibits homogeneous superfluidity. We examine the transition of striped to homogeneous superfluid phase using finite-size scaling and show that the critical hopping strength is independent of the atomic density. With interspecies interaction greater than intraspecies, the system exhibits phase-twisted to ferromagnetic phase transition without an intervening stripe phase. At finite temperatures, the thermal fluctuations destroy the phase-twisted superfluidity and lead to a wide region of normal-fluid states. These findings can be observed with recent quantum gas experiments with spin-orbit coupling in optical lattices.

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“…The Goldstone modes in the stripe phase have been recently theoretically investigated also in the presence of harmonic trapping (81,80). In this case one finds that, while in the PW and ZM phase the density and spin modes are fully hybridized, corresponding to the existence of a single gapless branch, in the stripe phase one finds the emergence of a novel low frequency excitation of spin nature (see Figure 9), whose experimental observation would represent a further crucial evidence of supersolidity.…”

Section: Elementary Excitations and Goldstone Modesmentioning

confidence: 93%

Coherently Coupled Mixtures of Bose-Einstein Condensed Gases

Recati,

Stringari

2021

Preprint

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This paper summarizes some of the relevant features exhibited by binary mixtures of Bose-Einstein condensates in the presence of coherent coupling at zero temperature. The coupling, which is experimentally produced by proper photon transitions, can either involve negligible momentum transfer from the electromagnetic radiation (Rabi coupling) or large momentum transfer (Raman coupling) associated with spin-orbit effects. The nature of the quantum phases exhibited by coherently coupled mixtures is discussed in detail, including their paramagnetic, ferromagnetic, and, in the case of spin-orbit coupling, supersolid phases. The behavior of the corresponding elementary excitations is discussed, with explicit emphasis on the novel features caused by the spin-like degree of freedom. Focus is further given to the topological excitations (solitons, vortices) as well as to the superfluid properties. The paper also points out relevant open questions which deserve more systematic theoretical and experimental investigations.

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Collective excitation of a trapped Bose-Einstein condensate with spin-orbit coupling

Cited by 26 publications

References 34 publications

Exciting the Goldstone Modes of a Supersolid Spin-Orbit-Coupled Bose Gas

Exciting the Goldstone Modes of a Supersolid Spin-Orbit-Coupled Bose Gas

Spin-orbit-coupling-driven superfluid states in optical lattices at zero and finite temperatures

Coherently Coupled Mixtures of Bose-Einstein Condensed Gases

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