Strong spin squeezing induced by weak squeezing of light inside a cavity

Nanophotonics

article

Wei Qin¹  Ye-Hong Chen¹  Xin Wang¹  Adam Miranowicz¹  Franco Nori¹ 

[1] Theoretical Quantum Physics Laboratory, RIKEN Cluster for Pioneering Research;Institute of Quantum Optics and Quantum Information, School of Science, Xi’an Jiaotong University;Faculty of Physics, Adam Mickiewicz University;Department of Physics, The University of Michigan

关键词: cavity QED;    optical squeezing;    spin squeezing;   

DOI  :  10.1515/nanoph-2020-0513

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 摘 要 】

We propose a simple method for generating spin squeezing of atomic ensembles in a Floquet cavity subject to a weak, detuned two-photon driving. We demonstrate that the weak squeezing of light inside the cavity can, counterintuitively, induce strong spin squeezing . This is achieved by exploiting the anti-Stokes scattering process of a photon pair interacting with an atom. Specifically, one photon of the photon pair is scattered into the cavity resonance by absorbing partially the energy of the other photon whose remaining energy excites the atom . The scattering, combined with a Floquet sideband, provides an alternative mechanism to implement Heisenberg-limited spin squeezing. Our proposal does not need multiple classical and cavity-photon drivings applied to atoms in ensembles, and therefore its experimental feasibility is greatly improved compared to other cavity-based schemes. As an example, we demonstrate a possible implementation with a superconducting resonator coupled to a nitrogen-vacancy electronic-spin ensemble.

【 授权许可】

CC BY