Decay of quantum sensitivity due to three-body loss in Bose-Einstein condensates

TL;DR

This paper investigates how three-body loss causes decoherence in Bose-Einstein Condensates, limiting their usefulness in quantum sensing applications and exploring ways to mitigate these effects.

Contribution

It provides a detailed analysis of the impact of three-body loss on quantum sensitivity in BECs and discusses potential strategies to reduce decoherence effects.

Findings

Three-body loss significantly reduces quantum sensitivity in BECs.

Restrictions on sensing parameters due to decoherence are identified.

Possible methods to mitigate three-body loss effects are discussed.

Abstract

In view of the coherent properties of a large number of atoms, Bose-Einstein Condensates (BECs) have a high potential for sensing applications. Several proposals have been put forward to use collective excitations such as phonons in BECs for quantum enhanced sensing in quantum metrology. However, the associated highly non-classical states tend to be very vulnerable to decoherence. In this article, we investigate the effect of decoherence due to the omnipresent process of three-body loss in BECs. We find strong restrictions for a wide range of parameters and we discuss possibilities to limit these restrictions.