Center for Theory of Quantum Matter, University of Colorado, Boulder, Colorado 80309, USA.
JILA, NIST, Department of Physics, University of Colorado, Boulder, Colorado 80309, USA.
Phys Rev Lett. 2023 Mar 17;130(11):113202. doi: 10.1103/PhysRevLett.130.113202.
We propose to simulate bosonic pair creation using large arrays of long-lived dipoles with multilevel internal structure coupled to an undriven optical cavity. Entanglement between the atoms, generated by the exchange of virtual photons through a common cavity mode, grows exponentially fast and is described by two-mode squeezing of effective bosonic quadratures. The mapping between an effective bosonic model and the natural spin description of the dipoles allows us to realize the analog of optical homodyne measurements via straightforward global rotations and population measurements of the electronic states, and we propose to exploit this for quantum-enhanced sensing of an optical phase (common and differential between two ensembles). We discuss a specific implementation based on Sr atoms and show that our sensing protocol is robust to sources of decoherence intrinsic to cavity platforms. Our proposal can open unique opportunities for next-generation optical atomic clocks.
我们提出使用具有多级内部结构的长寿命偶极子的大阵列来模拟玻色子对的产生，并将其与无驱动的光腔耦合。通过公共腔模交换虚拟光子产生的原子之间的纠缠以指数速度快速增长，并由有效玻色子正交分量的双模压缩来描述。有效玻色子模型与偶极子的自然自旋描述之间的映射允许我们通过直接的全局旋转和电子态的种群测量来实现光学外差测量的模拟，我们提议利用这一点来增强对光相位（两个集合之间的公共和差分）的量子感应。我们讨论了基于 Sr 原子的具体实现，并表明我们的感应协议对腔平台固有的退相干源具有鲁棒性。我们的建议可以为下一代光学原子钟开辟独特的机会。
