Work

Vorticity-Crystalline Order Coupling in Supersolids: Excitations and Reentrant Phases

Year: 2026

Type: article

Abstract: Rotation is a natural tool in ultracold gases to break time-reversal symmetry, yet its impact on the collective excitations of supersolids remains largely unexplored. We show theoretically that tuning the rotation frequency, rather than the interparticle interactions, can trigger the superfluid-to-supersolid transition in Bose-Einstein condensates. Computing excitation spectra in the presence of vortices and persistent currents, we uncover a vortex-driven desoftening mechanism whereby quantized vorticity elevates the gapless Goldstone mode to a finite-energy roton, restoring superfluidity. This effect results in reentrant supersolid phases as a function of rotation frequency, revealing a fundamental coupling between topological defects and crystalline order.

Source: Physical Review Letters

DOI: 10.1103/gqlr-bgj8

Authors: M. Schubert, K. Mukherjee, P. Stürmer, S. M. Reimann

Institutions: Lund University, University of Electro-Communications

Language: English

Topic: Cold Atom Physics and Bose-Einstein Condensates

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,750

Funders: Knut och Alice Wallenbergs Stiftelse, Vetenskapsrådet, Japan Society for the Promotion of Science