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Recent experiments on dipolar gases of magnetic atoms and polar molecules are opening interesting new possibilities.
On one side, experiments on dipolar Bose-Einstein condensates of magnetic atoms have recently created a dipolar supersolid array of quantum droplets, in which superfluidity and crystal-like order coexist. After briefly introducing the idea of quantum droplet and dipolar supersolid, I will discuss our recent works on 2D dipolar supersolids in collaboration with F. Ferlaino’s group [1-3], and the possibility of nucleating and observing vortices in the supersolid phase [4]. I will then comment on our works on dipolar mixtures, which can open novel scenarios for quantum droplets [5] and supersolids [6,7].
In the second part of the talk, I will comment on dipolar gases in optical lattices. I will first focus on the physics of inter-site dynamically-bound dimers, and in particular on dimer clusterization [8], and on flat-band dimers in 2D lattices [9]. I will then comment on how polar lattice gases are a very natural scenario for the study of the interplay between disorder-induced and interaction-induced localization, and of disorder-free many-body localization [10,11].
[1] Two-dimensional supersolidity in a dipolar quantum gas, M. A. Norcia, C. Politi, L. Klaus, E. Poli, M. Sohmen, M. J. Mark, R. Bisset, L. Santos, and F. Ferlaino, Nature 596, 357 (2021).
[2] Maintaining supersolidity in one and two dimensions, E. Poli, T. Bland, C. Politi, L. Klaus, M. A. Norcia, F. Ferlaino, R. N. Bisset, and L. Santos, Phys. Rev. A 104, 063307 (2021).
[3] Two-dimensional supersolidity in a circular trap, T. Bland, E. Poli, C. Politi, L. Klaus, M. A. Norcia, F. Ferlaino, L. Santos, and R. N. Bisset, Phys. Rev. Lett. 128, 195302 (2022).
[4] Creation and robustness of quantized vortices in a dipolar supersolid when crossing the superfluid-to-supersolid transition, M. Sindik, A. Recati, S. M. Roccuzzo, L. Santos, S. Stringari, arXiv:2206.14100.
[5] Quantum droplets of dipolar mixtures, R. N. Bisset, L. A. Peña Ardila, and L. Santos, Phys. Rev. Lett. 126, 025301 (2021).
[6] Catalyzation of supersolidity in binary dipolar condensates, D. Scheiermann, L. A. Peña Ardila, T. Bland, R. N. Bisset, and L. Santos, arXiv:2202.08259.
[7] Domain supersolids in binary dipolar condensates, T. Bland, E. Poli, L. A. Peña Ardila, L. Santos, F. Ferlaino, and R. N. Bisset, arXiv:2203.11119.
[8] Disorderless quasi-localization of polar gases in one-dimensional lattices, W. Li, A. Dhar, X. Deng, K. Kasamatsu, L. Barbiero, and L. Santos, Phys. Rev. Lett. 124, 010404 (2020).
[9] Cluster dynamics in two-dimensional lattice gases with inter-site interactions, W. Li, A. Dhar, X. Deng, and L. Santos, Phys. Rev. A 103, 043331 (2021).
[10] Hilbert space shattering and disorder-free localization in polar lattice gases, W. Li, X. Deng, and L. Santos, Phys. Rev. Lett. 127, 260601 (2021).
[11] Lattice control of non-ergodicity in a polar lattice gas, H. Korbmacher, P. Sierant, W. Li, X. Deng, J. Zakrzewski, and L. Santos, arXiv:2207.06186.
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