Excitation Spectrum of a Trapped Dipolar Supersolid and Its Experimental Evidence

Natale, G.; Bijnen, Rick van; Patscheider, A.; Petter, D.; Mark, Manfred J.; Chomaz, Lauriane; Ferlaino, Francesca

doi:10.1103/physrevlett.123.050402

Cited by 232 publications

(176 citation statements)

References 60 publications

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“…It is possible that this energetic effect could be mitigated in systems with an overall harmonic trapping potential. We can find some evidence in this direction in recent work with a highly-magnetic atom gas in a harmonic trap (and in the absence of a lattice potential) which suggested that supersolidity was not significantly affected by finite-size effects [75]. It will be interesting for future research to address the competing effects of long-range interactions with trapping in the stability of a supersolid phase.…”

Section: Discussion and Summarymentioning

confidence: 88%

Characterizing the phase diagram of finite-size dipolar Bose-Hubbard systems

et al. 2020

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We use state-of-the-art density matrix renormalization group calculations in the canonical ensemble to determine the phase diagram of the dipolar Bose-Hubbard model on a finite cylinder. We consider several observables that are accessible in typical optical lattice setups and assess how well these quantities perform as order parameters. We find that, especially for small systems, the occupation imbalance is less susceptible to boundary effects than the structure factor in uncovering the presence of a periodic density modulation. By analysing the non-local correlations, we find that the appearance of supersolid order is very sensitive to boundary effects, which may render it difficult to observe in quantum gas lattice experiments with a few tens of particles. Finally, we show how density measurements readily obtainable on a quantum gas microscope allow distinguishing between superfluid and solid phases using unsupervised machine-learning techniques. arXiv:1909.09099v1 [cond-mat.quant-gas]

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Section: Discussion and Summarymentioning

confidence: 88%

Characterizing the phase diagram of finite-size dipolar Bose-Hubbard systems

et al. 2020

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“…Several experiments have reported the observation of the dynamical structure factor with ultracold atoms (see eg Refs. [10,[34][35][36]).…”

Section: Experimental Probe Of the Dynamical Structure Factormentioning

confidence: 99%

“…The concept of supersolidity was first introduced in the context of liquid Helium more than fifty years ago [1,2]. With ultracold atoms, supersolidity has been observed with Bose-Einstein condensates in a cavity [3][4][5][6] as well as in dipolar quantum gases [7][8][9][10]. Both experimental realizations of supersolidity are based on longrange interactions [11], a key ingredient first introduced by Gross [12].…”

Section: Introductionmentioning

confidence: 99%

Excitation spectrum and supersolidity of a two-leg bosonic ring ladder

2020

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We consider a system of weakly interacting bosons confined on a planar double lattice ring subjected to two artificial gauge fields. This system is known to display three phases, the Meissner phase where the flow of particles is carried at the edges of the system without transverse current, a vortex phase characterized by non-zero transverse current, and a biased-ladder phase, characterized by an imbalance of the population of the two rings. We use the Bogoliubov approximation to determine the excitation spectrum in the three phases, the dynamic structure factor and the quantum fluctuation corrections to the first-order correlation function. Our analysis reveals supersolid features as well as Josephson modes, corresponding to out-of-phase modes of the finite ring.PACS numbers: 05.30.-d,67.85.-d,67.85.Pq arXiv:1910.06410v1 [cond-mat.quant-gas]

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“…More recently, the elementary excitations spectrum of 164 Dy and 166 Er dipolar Bose gases were analyzed in Ref. [3], by considering three-dimensional (3D) anisotropic traps across the superfluid-supersolid phase transition. The recent investigations in ultracold laboratories with two-component dipolar Bose-Einstein Condensates (BEC), on stability and miscibility properties, became quite interesting due to the number of control parameters that can be explored in new experimental setups.…”

Section: Dipolar Bose-einstein Condensate -Introductionmentioning

confidence: 99%

Report on scipost_201911_00021v1

2019

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By considering symmetric and asymmetric dipolar coupled mixtures (with dysprosium and erbium isotopes), we report a study on relevant anisotropic effects, related to spatial separation and miscibility, due to dipole-dipole interactions (DDIs) in rotating binary dipolar Bose-Einstein condensates. The binary mixtures are kept in strong pancake-like traps, with repulsive two-body interactions modeled by an effective two-dimensional (2D) coupled Gross-Pitaevskii equation. The DDI are tuned from repulsive to attractive by varying the dipole polarization angle. A clear spatial separation is verified in the densities for attractive DDIs, being angular for symmetric mixtures and radial for asymmetric ones. Also relevant is the mass-imbalance sensibility observed by the vortexpatterns in symmetric and asymmetric-dipolar mixtures. In an extension of this study, here we show how the rotational properties and spatial separation of these dipolar mixture are affected by a quartic term added to the harmonic trap of one of the components. Contents 1 Dipolar Bose-Einstein condensate-Introduction 2 2 Model formalism, parametrization and numerical approach 3 2.1 Model formalism 3 2.2 Parametrization and numerical approach 4 3 Symmetric and asymmetric dipolar mixtures-Results 4 3.1 Dipolar mixtures confined by identical harmonic pancake-like traps 4 3.2 Dipolar symmetric 164 Dy-162 Dy mixture, with a quartic trap applied to 164 Dy 5 3.3 Dipolar asymmetric 168 Er-164 Dy mixture, with a quartic trap applied to 168 Er 6

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Excitation Spectrum of a Trapped Dipolar Supersolid and Its Experimental Evidence

Cited by 232 publications

References 60 publications

Characterizing the phase diagram of finite-size dipolar Bose-Hubbard systems

Characterizing the phase diagram of finite-size dipolar Bose-Hubbard systems

Excitation spectrum and supersolidity of a two-leg bosonic ring ladder

Report on scipost_201911_00021v1

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