A dynamic scheme for generating number squeezing in Bose-Einstein condensates through nonlinear interactions

TL;DR

This paper proposes a dynamic method to generate strong number squeezing in Bose-Einstein condensates by exploiting interference and nonlinear interactions, achieving noise reduction below quantum limits.

Contribution

The authors introduce a novel dynamic scheme combining interference and nonlinear interactions to produce significant number squeezing in BECs, validated by models and realistic parameters.

Findings

Achieves strong number squeezing with realistic parameters

Noise can be reduced below the quantum limit

Scheme works even with initial classical noise

Abstract

We develop a scheme to generate number squeezing in a Bose-Einstein condensate by utilizing interference between two hyperfine levels and nonlinear atomic interactions. We describe the scheme using a multimode quantum field model and find agreement with a simple analytic model in certain regimes. We demonstrate that the scheme gives strong squeezing for realistic choices of parameters and atomic species. The number squeezing can result in noise well below the quantum limit, even if the initial noise on the system is classical and much greater than that of a poisson distribution.