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From Few to Many: Observing the Formation of a Fermi Sea One Atom at a Time
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From Few to Many: Observing the Formation of a Fermi Sea One Atom at a Time
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Journal Article
From Few to Many: Observing the Formation of a Fermi Sea One Atom at a Time
2013
Overview
Knowing when a physical system has reached sufficient size for its macroscopic properties to be well described by many-body theory is difficult. We investigated the crossover from few-to many-body physics by studying quasi-one-dimensional systems of ultracold atoms consisting of a single impurity interacting with an increasing number of identical fermions. We measured the interaction energy of such a system as a function of the number of majority atoms for different strengths of the interparticle interaction. As we increased the number of majority atoms one by one, we observed fast convergence of the normalized interaction energy toward a many-body limit calculated for a single impurity immersed in a Fermi sea of majority particles.
Publisher
American Association for the Advancement of Science,The American Association for the Advancement of Science
