Fast generation of spin squeezing via resonant spin-boson coupling

TL;DR

This paper introduces fast protocols for generating spin-squeezed entangled states in spin-boson systems, leveraging natural interactions for exponential speedup, with robustness against decoherence demonstrated.

Contribution

It presents novel, rapid protocols for spin squeezing via resonant spin-boson coupling, applicable to trapped-ion and cavity QED systems, outperforming traditional methods.

Findings

Protocols achieve exponential speed in spin squeezing.

Robustness against natural decoherence sources.

Advantage over standard algebraic entanglement generation.

Abstract

We propose protocols for the creation of useful entangled states in a system of spins collectively coupled to a bosonic mode, directly applicable to trapped-ion and cavity QED setups. The protocols use coherent manipulations of the spin-boson interactions naturally arising in these systems to prepare spin squeezed states exponentially fast in time. We demonstrate the robustness of the protocols by analyzing the effects of natural sources of decoherence in these systems and show their advantage compared to more standard slower approaches where entanglement is generated algebraically with time.