Faraday Waves in strongly interacting superfluids

Autor:	F. J. Poveda-Cuevas, José Eduardo Padilla Castillo, Andrés Gutiérrez Valdés, Diego Hernández Rajkov, Alejandra del Río Lima, J. A. Seman
Rok vydání:	2021
Předmět:	Faraday wave Superfluidity Physics Condensed Matter::Quantum Gases symbols.namesake Quantum Gases (cond-mat.quant-gas) Quantum electrodynamics symbols General Physics and Astronomy FOS: Physical sciences Condensed Matter - Quantum Gases
DOI:	10.48550/arxiv.2106.13872
Popis:	We report on the observation of Faraday waves in a cigar-shaped Fermi superfluid of $^6$Li parametrically excited by modulating the radial trap frequency. We characterize the phenomenon as a function of the interaction parameter by means of a Feshbach resonance. Starting from the BEC side of the resonance we observe a drop on the visibility of the Faraday pattern as we approach to unitarity, possibly due to the increased incompressibility of the system. We probe the superfluid excitation spectrum by extracting an effective 1D speed of sound for different values of the interaction parameter, in good agreement with numerical simulations. Finally, we perform a stability analysis in the parameter space using a simplified model and we show the emergence of the Faraday waves as unstable solutions to a Mathieu-like equation. Comment: 10 pages, 9 figures
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::77a12255b6855a5213cd352ed21e9b93 Zobrazit plný text záznamu