ON-LINE QLunch: Niels Benedikter

Speaker: Niels Benedikter

Title: Correlation Energy of a Weakly Interacting Fermi Gas

Quantum correlations in many-body systems are notoriously difficult to describe mathematically. I will show how correlations in an interacting Fermi gas can be described as collective degrees of freedom emerging from bosonization of particle--hole excitations. This allows us to prove upper and, very recently, also lower bounds on corrections to the systems energy, verifying the predictions of the non-rigorous random phase approximation.

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