Scientific Results

Time-Resolved Observation of Competing Attractive and Repulsive Short-Range Correlations in Strongly Interacting Fermi Gases

Year: 2018

Authors: Amico A.; Scazza F.; Valtolina G.; Tavares P. E. S.; Ketterle W.; Inguscio M.; Roati G.; Zaccanti M.

Autors Affiliation: Univ Firenze, LENS, I-50019 Sesto Fiorentino, Italy; Univ Firenze, Dipartimento Fis & Astron, I-50019 Sesto Fiorentino, Italy; CNR, INO, I-50019 Sesto Fiorentino, Italy; MIT, MIT Harvard Ctr Ultracold Atoms, Dept Phys, Cambridge, MA 02139 USA; MIT, Res Lab Elect, Cambridge, MA 02139 USA; Univ Colorado, JILA, Boulder, CO 80309 USA; Univ Sao Paulo, Inst Fis Sao Carlos, Caixa Postal 369, BR-13560970 Sao Carlos, SP, Brazil

Abstract: We exploit a time-resolved pump-probe spectroscopic technique to study the out-of-equilibrium dynamics of an ultracold two-component Fermi gas, selectively quenched to strong repulsion along the upper branch of a broad Feshbach resonance. For critical interactions, we find the rapid growth of short-range anticorrelations between repulsive fermions to initially overcome concurrent pairing processes. At longer evolution times, these two competing mechanisms appear to macroscopically coexist in a short-range correlated state of fermions and pairs, unforeseen thus far. Our work provides fundamental insights into the fate of a repulsive Fermi gas, and offers new perspectives towards the exploration of complex dynamical regimes of fermionic matter


Volume: 121 (25)      Pages from: 253602-1  to: 253602-6

KeyWords: Electron gas; Petroleum prospecting, Competing mechanisms; Dynamical regime; Feshbach resonances; Out-of-equilibrium dynamics; Short-range correlations; Spectroscopic technique; Time resolved pump probes; Two-component fermi gas, Fermions; Spectroscopy; Ferromagnetism
DOI: 10.1103/PhysRevLett.121.253602

Citations: 22
data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2021-10-24
References taken from IsiWeb of Knowledge: (subscribers only)
Connecting to view paper tab on IsiWeb: Click here
Connecting to view citations from IsiWeb: Click here

This site uses cookies. If you decide to continue browsing we consider that you accept their use. For more information about cookies and how to delete them please read our Info Policy on cookies use.
Read more