Current browse context:
cond-mat.quant-gas
Change to browse by:
References & Citations
Condensed Matter > Quantum Gases
Title: Probing pair correlations in Fermi gases with Ramsey-Bragg interferometry
(Submitted on 21 Dec 2023 (v1), last revised 9 Apr 2024 (this version, v3))
Abstract: We propose an interferometric method to probe pair correlations in a gas of spin-1/2 fermions. The method consists of a Ramsey sequence where both spin states of the Fermi gas are set in a superposition of a state at rest and a state with a large recoil velocity. The two-body density matrix is extracted via the fluctuations of the transferred fraction to the recoiled state. In the pair-condensed phase, the off-diagonal long-range order is directly reflected in the asymptotic behavior of the interferometric signal for long interrogation times. The method also allows to probe the spatial structure of the condensed pairs: the interferometric signal is an oscillating function of the interrogation time in the Bardeen-Cooper-Schrieffer regime; it becomes an overdamped function in the molecular Bose-Einstein condensate regime.
Submission history
From: Hadrien Kurkjian [view email][v1] Thu, 21 Dec 2023 15:46:29 GMT (649kb,D)
[v2] Mon, 8 Apr 2024 09:11:47 GMT (764kb,D)
[v3] Tue, 9 Apr 2024 21:59:15 GMT (764kb,D)
Link back to: arXiv, form interface, contact.