The Quadratic Spin Squeezing Operators

TL;DR

This paper explores quadratic spin squeezing operators that reduce quantum noise in atomic spin systems, with implications for quantum measurement and nuclear physics models.

Contribution

It introduces and analyzes a class of quadratic spin squeezing operators, extending previous work to broader systems and applications.

Findings

Quadratic spin squeezing operators effectively reduce quantum noise.

Application of these operators to the Lipkin model.

Potential improvements in quantum measurement precision.

Abstract

We discuss generic spin squeezing operators (quadratic in angular momentum operators) capable of squeezing out quantum mechanical noise from a system of two-level atoms (spins) in a coherent state. Such systems have been considered by Kitagawa and Ueda (Refs. 2) in this context and a Hamiltonian of this nature governs the Lipkin model (Ref. 14) which is relevant to nuclear physics.