Freiburg 2024 – scientific programme
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A: Fachverband Atomphysik
A 24: Fermionic Quantum Gases II (joint session Q/A)
A 24.1: Talk
Wednesday, March 13, 2024, 14:30–14:45, Aula
Exact one-particle density matrix for SU(N) fermionic matter-waves in the strong repulsive limit — •Andreas Osterloh1, Wayne Chetcuti1, Juan Polo1, and Luigi Amico1,2 — 1Technology Innovation Institute, Masdar City and Yas Island, P.O. box 9639Abu Dhabi, UAE — 2Dipartimento di Fisica e Astronomia Ettore Majorana, Via S. Sofia 64, 95127 Catania, Italy
We consider a gas of repulsive N-component fermions confined in a ring-shaped potential, subject to an effective magnetic field. For large repulsion strengths, we work out a Bethe ansatz scheme to compute the two-point correlation matrix and then the one-particle density matrix. Our results holds in the mesoscopic regime of finite but sufficiently large number of particles and system size that are not accessible by numerics. We access the momentum distribution of the system and analyse its specific dependence of interaction, magnetic field and number of components N. In the context of cold atoms, the exact computation of the correlation matrix to determine the interference patterns that are produced by releasing cold atoms from ring traps is carried out.
Keywords: atomtronics; persistent current; SU(N) fermions; lattice & continuous model; theory