Anomalous fermion bunching in density-density correlation

TL;DR

This paper predicts an anomalous fermion bunching effect in density-density correlations of ultracold Fermi gases, accounting for detector resolution, and supports its experimental observation with theoretical analysis.

Contribution

It introduces a theoretical framework including detector resolution effects to explain anomalous fermion bunching in ultracold Fermi gases, a phenomenon previously unaccounted for.

Findings

Identification of anomalous fermion bunching as a quantum effect

Support for the phenomenon through recent experimental data

Enhanced understanding of density correlations in ultracold Fermi gases

Abstract

We consider theoretically density-density correlation of identical Fermi system by including the finite resolution of a detector and delta-function term omitted in the ordinary method. We find an anomalous fermion bunching effect, which is a quantum effect having no classical analogue. This anomalous fermion bunching is studied for ultracold Fermi gases released from a three-dimensional optical lattices. It is found that this anomalous fermion bunching is supported by a recent experiment (T. Rom et al Nature 444, 733 (2006)).