Spin-squeezed atomic crystal

TL;DR

This paper introduces a method to create a spin-squeezed atomic crystal in a 3D optical lattice, enabling enhanced quantum correlations and improved atomic clock performance by suppressing collisional shifts.

Contribution

It presents a novel adiabatic scheme to produce a regular, coherent, and spin-squeezed atomic arrangement in an optical lattice using Bose-Einstein condensates.

Findings

Feasible implementation with current microwave techniques.

Potential to improve optical-lattice atomic clocks.

Strong suppression of collisional shifts.

Abstract

We propose a method to obtain a regular arrangement of two-level atoms in a three-dimensional optical lattice with unit filling, where all the atoms share internal state coherence and metrologically useful quantum correlations. Such a spin-squeezed atomic crystal is obtained by adiabatically raising an optical lattice in an interacting two-component Bose-Einstein condensate. The scheme could be directly implemented on a microwave transition with state-of-the art techniques and used in optical-lattice atomic clocks with bosonic atoms to strongly suppress the collisional shift and benefit from the spins quantum correlations at the same time.