Work

Scissors modes in generalized Gross–Pitaevskii equations

Year: 2026

Type: article

Abstract: We investigate scissors modes in nonlinear systems with arbitrary power-law dependence of the nonlinear term. Through analytical derivation, we establish a general expression demonstrating that, in the Thomas–Fermi regime, the frequency of the scissors mode is independent of the specific form of the nonlinearity. We conclude that the scissors mode is a shear mode that does not probe the compressibility of the system, which depends on nonlinearity. To validate our findings, we perform numerical simulations of experimentally relevant Lee–Huang–Yang systems. Our results illustrate the transition of the scissors mode frequency from the non-interacting to the strongly interacting (Thomas–Fermi) regime. Finally, we demonstrate that the scissors mode frequency remains clearly identifiable even under strong quenches, which should facilitate the experimental observation of our findings.

Source: Low Temperature Physics

DOI: 10.1063/10.0044824

Authors: Oleksandr V. Marchukov, Neelam Shukla, Jeremy R. Armstrong, Bastien Humbert, Jan Arlt, Artem G. Volosniev

Institutions: Leibniz University Hannover, University of Nebraska at Kearney, Aarhus University

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: green