On the Weakness of Short-Range Interactions in Fermi Gases

preprint2022arXivOpen access

Abstract

Ultracold quantum gases of equal spin fermions with short range interactions are often considered free even in the presence of strongly binding spin-up-spin-down pairs. We describe a large class of many-particle Schrödinger operators with short-range pair interactions, where this approximation can be justified rigorously.

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