Bulletin of the American Physical Society
52nd Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 66, Number 6
Monday–Friday, May 31–June 4 2021; Virtual; Time Zone: Central Daylight Time, USA
Session U07: Quantum Simulation with Degenerate Fermi Gases
2:00 PM–4:00 PM,
Thursday, June 3, 2021
Chair: Randy Hulet, Rice
Abstract: U07.00003 : Microscopy of Continuum Fermi GasesĀ
2:24 PM–2:36 PM
Live
Presenter:
Philipp M Preiss
(Heidelberg University)
Authors:
Philipp M Preiss
(Heidelberg University)
Luca Bayha
(Heidelberg University)
Marvin Holten
(Univ Heidelberg)
Keerthan Subramanian
(Heidelberg University)
Ralf Klemt
(Heidelberg University)
Sandra Brandstetter
(Heidelberg University)
Carl Heintze
(Heidelberg University)
Selim Jochim
(Heidelberg University)
I will present our recent development of such microscopic probes for few-body Fermi gases. Using a free-space fluorescence imaging scheme for Lithium 6, we detect individual particles after time-of-flight and determine the spin and momentum of every particle in the system. We apply this technique to few-fermion states in two dimensions, which we assemble particle by particle. Even in the absence of interactions, we observe order enforced by the Pauli exclusion principle [1]. Switching on attractive interactions between the particles induces pair formation and momentum correlations. We find that even systems consisting of only a dozen particles exhibit correlations and excitation spectra known from many-body theory [2].
Our experiments provide a new avenue to systematically explore the emergence of collective phenomena from the microscopic limit.
[1] M. Holten et al., Phys. Rev. Lett. 126, 020401 (2021)
[2] L. Bayha et al., Nature 587, 583 (2020)
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