Zhang Yong-Chang, Zhou Xiang-Fa, Zhou Xingxiang, Guo Guang-Can, Zhou Zheng-Wei
Key Laboratory of Quantum Information, Chinese Academy of Sciences, University of Science and Technology of China, Hefei 230026, China.
Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China.
Phys Rev Lett. 2017 Feb 24;118(8):083604. doi: 10.1103/PhysRevLett.118.083604.
We propose a scheme to realize the two-axis countertwisting spin-squeezing Hamiltonian inside an optical cavity with the aid of phase-locked atom-photon coupling. By careful analysis and extensive simulation, we demonstrate that our scheme is robust against dissipation caused by cavity loss and atomic spontaneous emission, and it can achieve significantly higher squeezing than one-axis twisting. We further show how our idea can be extended to generate two-mode spin-squeezed states in two coupled cavities. Because of its easy implementation and high tunability, our scheme is experimentally realizable with current technologies.
我们提出了一种借助锁相原子-光子耦合在光学腔内实现双轴反向扭转自旋压缩哈密顿量的方案。通过仔细分析和广泛模拟，我们证明我们的方案对于由腔损耗和原子自发辐射引起的耗散具有鲁棒性，并且它能够实现比单轴扭转显著更高的压缩。我们进一步展示了如何扩展我们的想法以在两个耦合腔中产生双模自旋压缩态。由于其易于实现和高度可调谐性，我们的方案利用当前技术在实验上是可实现的。
