Supersolid phases of dipolar bosons in optical lattices with a staggered flux

Tieleman, O.; Lazarides, Achilleas; Smith, C. Morais

doi:10.1103/physreva.83.013627

Cited by 35 publications

(27 citation statements)

References 26 publications

(90 reference statements)

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“…In the present system, the generation of vortices is a direct consequence of the interplay between the SO coupling, spin-dependent periodic potential, and interatomic interactions. This is very different from the usual manner of creating supersolid vortices by rotation [16] or artificial magnetic fields [19].…”

Section: Spin-orbit-coupling Induced Supersolidmentioning

confidence: 76%

Supersolid with nontrivial topological spin textures in spin-orbit-coupled Bose gases

et al. 2015

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Supersolid is a long-sought exotic phase of matter, which is characterized by the co-existence of a diagonal long-range order of solid and an off-diagonal long-range order of superfluid. Possible candidates to realize such a phase have been previously considered, including hard-core bosons with long-range interaction and soft-core bosons. Here we demonstrate that an ultracold atomic condensate of hard-core bosons with contact interaction can establish a supersolid phase when simultaneously subjected to spin-orbit coupling and a spin-dependent periodic potential. This supersolid phase is accompanied by topologically nontrivial spin textures, and is signaled by the separation of momentum distribution peaks, which can be detected via time-of-flight measurements. We also discuss possibilities to produce and observe the supersolid phase for realistic experimental situations.

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Section: Spin-orbit-coupling Induced Supersolidmentioning

confidence: 76%

Supersolid with nontrivial topological spin textures in spin-orbit-coupled Bose gases

et al. 2015

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“…The common ingredient in both sets of investigations is the presence of long-range interactions. There have also been various works focusing on how an artificial gauge field in a dipolar BEC influences the boundaries between Mott-insulator and supersolid regimes [298,299], and how staggered fluxes lead to supersolid phases with staggered vortex phases [300]. However, there does not appear to have been much investigation into the structural properties of vortices [301] and vortex lattices in the supersolid state.…”

Section: Vortex Lattices In the Supersolid Phasementioning

confidence: 99%

Vortices and vortex lattices in quantum ferrofluids

Martin

Marchant

O’Dell

et al. 2017

J. Phys.: Condens. Matter

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The experimental realization of quantum-degenerate Bose gases made of atoms with sizeable magnetic dipole moments has created a new type of fluid, known as a quantum ferrofluid, which combines the extraordinary properties of superfluidity and ferrofluidity. A hallmark of superfluids is that they are constrained to rotate through vortices with quantized circulation. In quantum ferrofluids the long-range dipolar interactions add new ingredients by inducing magnetostriction and instabilities, and also affect the structural properties of vortices and vortex lattices. Here we give a review of the theory of vortices in dipolar Bose-Einstein condensates, exploring the interplay of magnetism with vorticity and contrasting this with the established behaviour in non-dipolar condensates. We cover single vortex solutions, including structure, energy and stability, vortex pairs, including interactions and dynamics, and also vortex lattices. Our discussion is founded on the mean-field theory provided by the dipolar Gross-Pitaevskii equation, ranging from analytic treatments based on the Thomas-Fermi (hydrodynamic) and variational approaches to full numerical simulations. Routes for generating vortices in dipolar condensates are discussed, with particular attention paid to rotating condensates, where surface instabilities drive the nucleation of vortices, and lead to the emergence of rich and varied vortex lattice structures. We also present an outlook, including potential extensions to degenerate Fermi gases, quantum Hall physics, toroidal systems and the Berezinskii-Kosterlitz-Thouless transition.

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“…Supersolid structures have also been theoretically predicted in dipolar gases trapped in optical lattices [19][20][21][22][23][24][25][26][27][28][29]. As optical lattices already impose a crystalline structure, solid order in these systems is realized when a discrete symmetry is also broken as particles arrange themselves in a crystalline structure different than the one of the underlining optical lattice, e.g.…”

Section: Introductionmentioning

confidence: 93%

Supersolid phases of lattice dipoles tilted in three-dimensions

Zhang,

Yang

et al. 2022

Preprint

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By means of quantum Monte Carlo simulations we study phase diagrams of dipolar bosons in a square optical lattice. The dipoles in the system can freely orientate in three dimensions. Starting from experimentally tunable parameters like scattering length and dipolar interaction strength, we derive the parameters entering the effective Hamiltonian. Depending on the direction of the dipoles, various types of supersolids (e.g. checkerboard, stripe) and solids (checkerboard, stripe, diagonal stripe, and an incompressible phase) can be stabilized. Remarkably, we find a cluster supersolid characterized by the formation of horizontal clusters of particles. These clusters order along a direction at an angle with the horizontal. Moreover, we find what we call a grain-boundary superfluid. In this phase, regions with solid order are separated by extended defects -grain boundaries-which support superfluidity. We also investigate the robustness of the stripe supersolid against thermal fluctuations. Finally, we comment on the experimental realization of the phases found.

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Supersolid phases of dipolar bosons in optical lattices with a staggered flux

Cited by 35 publications

References 26 publications

Supersolid with nontrivial topological spin textures in spin-orbit-coupled Bose gases

Supersolid with nontrivial topological spin textures in spin-orbit-coupled Bose gases

Vortices and vortex lattices in quantum ferrofluids

Supersolid phases of lattice dipoles tilted in three-dimensions

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