Noise limits in matter-wave interferometry using degenerate quantum gases

TL;DR

This paper investigates the fundamental phase resolution limits of matter-wave interferometers using degenerate quantum gases, highlighting that fermions outperform bosons under similar conditions due to quantum statistics and interactions.

Contribution

It provides a comparative analysis of phase resolution limits for bosonic and fermionic degenerate gases in matter-wave interferometry, emphasizing the advantages of fermions.

Findings

Fermions achieve better phase resolution than bosons with equal atom numbers.

Atom-atom interactions in bosons degrade phase resolution.

Quantum statistics significantly influence interferometry performance.

Abstract

We analyze the phase resolution limit of a Mach-Zehnder atom interferometer whose input consists of degenerate quantum gases of either bosons or fermions. For degenerate gases, the number of atoms within one de Broglie wavelength is larger than unity, so that atom-atom interactions and quantum statistics are no longer negligible. We show that for equal atom numbers, the phase resolution achievable with fermions is noticeably better than for interacting bosons.