Long lifetime supersolid in a two-component dipolar Bose-Einstein condensate

Abstract

Recent studies on supersolidity in a single-component Bose-Einstein condensate (BEC) have relied on the Lee-Huang-Yang (LHY) correction for stabilization of self-bound droplets, which however involves a high density inside the droplets, limiting the lifetime of the supersolid. Here we propose a two-component mixture of dipolar and nondipolar BECs, such as an 166 Er-87 Rb mixture, to create and stabilize a supersolid without the LHY correction, which can suppress the atomic loss and may allow observation of the long-time dynamics of the supersolid. In such a system, supersolidity can be controlled by the difference in the trap centers between the two components.

Stability of a flattened dipolar binary condensate: emergence of the spin roton

“…This is also a regime where a domain-supersolid can develop in which the two components form a series of alternating domains, producing an immiscible double supersolid (e.g. see [12,13]). Interestingly, this can occur at lower densities where the quantum fluctuation effects are not significant and loss rates will be much lower.…”

“…related work on degenerate fermionic mixtures [5,6]). The case of a two-component (binary) magnetic superfluid has been the subject of theoretical proposals for a new class of quantum droplet states [7][8][9] and supersolid phases [10][11][12][13]. The interplay of immiscibility and the long-ranged interactions has been the subject of investigations exploring pattern formation and novel instabilities [14,15].…”