Bright Soliton to Quantum Droplet Transition in a Mixture of Bose-Einstein Condensates

Cheiney, Pierrick; Cabrera, Cesar R.; Sanz, Jorge Luciano Alió; Naylor, B.; Tanzi, L.; Tarruell, Leticia

doi:10.1103/physrevlett.120.135301

Cited by 407 publications

(385 citation statements)

References 45 publications

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“…Indeed, as pointed out by D. Petrov [24], the interplay between attractive inter-and repulsive intra-species couplings can give rise to the formation of liquid-like "quantum droplets". These were first observed in single-species dipolar gases [25][26][27][28][29][30], wherein the attractive dipole-dipole interaction plays the role of the interspecies interaction, and then in homonuclear mixtures of 39 K [31][32][33] and heteronuclear mixtures of 41 K-87 Rb [34]. In the latter cases, as originally proposed [24,35], the system is characterized only by isotropic contact interactions, allowing for a simple theoretical description of the droplet state.…”

Section: Introductionmentioning

confidence: 86%

A Dual-Species Bose-Einstein Condensate with Attractive Interspecies Interactions

et al. 2020

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We report on the production of a 41 K-87 Rb dual-species Bose-Einstein condensate with tunable interspecies interaction and we study the mixture in the attractive regime, i.e. for negative values of the interspecies scattering length a12. The binary condensate is prepared in the ground state and confined in a pure optical trap. We exploit Feshbach resonances for tuning the value of a12. After compensating the gravitational sag between the two species with a magnetic field gradient, we drive the mixture into the attractive regime. We let the system to evolve both in free space and in an optical waveguide. In both geometries, for strong attractive interactions, we observe the formation of self-bound states, recognizable as quantum droplets. Our findings prove that robust, long-lived droplet states can be realized in attractive two-species mixtures, despite the two atomic components possibly experiencing different potentials. * burchianti@lens.unifi.it † Present address: Istituto per la Protezione Sostenibile delle Piante, CNR-IPSP, 10135 Torino, Italy arXiv:2003.13362v1 [cond-mat.quant-gas]

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Section: Introductionmentioning

confidence: 86%

A Dual-Species Bose-Einstein Condensate with Attractive Interspecies Interactions

et al. 2020

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“…) . In the following we consider a weakly interacting mixture of 133 Cs and 6 Li, corresponding to the mass ratio w=22.09, with varied a a BF BB . Figure 1 plane.…”

Section: Uniform 2d Mixturementioning

confidence: 99%

“…This suggests existence of a plateau around κ=κ c , where droplet equilibrium densities are almost independent of the choice of a particular cut-off. 6 The universality of such treatment adopted for 2D system can be surmised from the work in [14], which treats the Bose-Bose system on an equivalent ground, but further back it up by evidences supported by Monte-Carlo analysis.…”

Section: Uniform 2d Mixturementioning

confidence: 99%

“…In figure 2(a), we show the equilibrium density ratios of liquid droplets in 133 Cs- 6 Li mixture with a a BF BB . The solid line shows the approximate results governed by equation (11), which corresponds to initial choice for our cut-off momentum obtained via equation (8).…”

Section: Uniform 2d Mixturementioning

confidence: 99%

“…Recently quantum liquids attracted a lot of attention of both experimentalists [1][2][3][4][5][6][7] and theorists [8][9][10][11][12]. Quantum self bound droplets can be formed in dipolar condensates or two-component Bose-Bose mixtures [8].…”

Section: Introductionmentioning

confidence: 99%

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Self-bound Bose–Fermi liquids in lower dimensions

et al. 2019

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We study weakly interacting mixtures of ultracold atoms composed of bosonic and fermionic species in 2D and 1D. When interactions between particles are appropriately tuned, self-bound quantum liquids can be formed. We show that while formation of these droplets in 2D is due to the higher order correction terms contributing to the total energy and originating in quantum fluctuations, in 1D geometry the quantum fluctuations have a negligible role on formation of the self-bound systems. The leading mean-field interactions are then sufficient for droplet formation in 1D. We analyze energetic stability for 2D and 1D systems and predict values of equilibrium densities of droplets.

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Semidiscrete Vortex Solitons

Chen

et al. 2021

Advanced Photonics Research

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A possibility of creation of stable optical solitons combining one continuous and one discrete coordinates, with embedded vorticity, in an array of planar waveguides with intrinsic cubic–quintic (CQ) nonlinearity is demonstrated. The same system may be realized in terms of the spatiotemporal light propagation in an array of tunnel‐coupled optical fibers with the CQ nonlinearity. In contrast with zero‐vorticity states, semidiscrete vortex solitons do not exist without the quintic term in the nonlinearity. Two types of the solitons, viz., intersite‐centered (IC) and onsite‐centered (OC) ones, with even and odd numbers N of actually excited sites in the discrete direction, are identified. The modes carrying the embedded vorticity S=1 and 2 are considered. In accordance with their symmetry, the vortex solitons of the OC type exhibit an intrinsic core, whereas the IC solitons with small N may have a coreless structure. Facilitating their creation in the experiment, the modes reported in the present work may be much more compact states than their counterparts considered in other systems, and they feature strong anisotropy. They can be set in motion in the discrete direction, provided that the coupling constant exceeds a certain minimum value. Collisions between moving vortex solitons are also considered.

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Bright Soliton to Quantum Droplet Transition in a Mixture of Bose-Einstein Condensates

Cited by 407 publications

References 45 publications

A Dual-Species Bose-Einstein Condensate with Attractive Interspecies Interactions

A Dual-Species Bose-Einstein Condensate with Attractive Interspecies Interactions

Self-bound Bose–Fermi liquids in lower dimensions

Semidiscrete Vortex Solitons

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