Catalyzation of supersolidity in binary dipolar condensates

Breakthrough experiments have newly explored the fascinating physics of dipolar quantum droplets and supersolids. The recent realization of dipolar mixtures opens further intriguing possibilities. We show that under rather general conditions, the presence of a second component catalyzes droplet nucleation and supersolidity in an otherwise unmodulated condensate. Droplet catalyzation in miscible mixtures, which may occur even for a surprisingly small impurity doping, results from a local roton instability triggered by the doping-dependent modification of the effective dipolar strength. The catalyzation mechanism may trigger the formation of a two-fluid supersolid, characterized by a generally different superfluid fraction of each component, which opens intriguing possibilities for the future study of spin physics in dipolar supersolids.

[1]  B. Lev,et al.  Dipolar physics: a review of experiments with magnetic quantum gases , 2022, Reports on progress in physics. Physical Society.

[2]  Luis Santos,et al.  Two-dimensional supersolidity in a dipolar quantum gas , 2021, Nature.

[3]  A. Fioretti,et al.  Evidence of superfluidity in a dipolar supersolid from nonclassical rotational inertia , 2019, Science.

[4]  T. Pfau,et al.  New states of matter with fine-tuned interactions: quantum droplets and dipolar supersolids , 2020, Reports on progress in physics. Physical Society.

[5]  H. Büchler,et al.  The low-energy Goldstone mode in a trapped dipolar supersolid , 2019, Nature.

[6]  A. Recati,et al.  Supersolid symmetry breaking from compressional oscillations in a dipolar quantum gas , 2019, Nature.

[7]  P. Cheiney,et al.  Quantum liquid droplets in a mixture of Bose-Einstein condensates , 2018 .

[8]  L. Santos,et al.  Observation of Roton Mode Population in a Dipolar Quantum Gas , 2017, Nature Physics.

[9]  Wolfgang Ketterle,et al.  A stripe phase with supersolid properties in spin–orbit-coupled Bose–Einstein condensates , 2016, Nature.

[10]  T. Donner,et al.  Supersolid formation in a quantum gas breaking a continuous translational symmetry , 2016, Nature.

[11]  Tilman Pfau,et al.  Self-bound droplets of a dilute magnetic quantum liquid , 2016, Nature.

[12]  Clarissa Wink,et al.  Observing the Rosensweig instability of a quantum ferrofluid , 2015, Nature.

[13]  L. Reatto,et al.  Overview on Solid 4He and the Issue of Supersolidity , 2013 .