自旋-$S$ 发射体的脉冲相干和压缩驱动作为维格纳负值光的确定性源
Pulsed coherent and squeezed driving of a spin-$S$ emitter as a deterministic source of Wigner-negative light
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- Dodd-Walls Centre for Photonic and Quantum Technologies（多德沃尔斯光子与量子技术中心）
- Department of Physics, University of Auckland（奥克兰大学物理系）
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中文总结 AI 辅助
本文通过模拟级联系统模型，证明利用自旋发射体的脉冲相干或压缩驱动可确定性产生强维格纳负值光态，并扩展到更高自旋以生成更奇异的非经典态，如GKP态。
中文摘要 AI 辅助
产生传播的维格纳负值光态对于许多量子技术而言是一项重要且困难的任务。历史上，提出创建此类态的方法本质上是概率性的，依赖于条件测量或光子预示。最近，有人提出了涉及两能级发射体稳态驱动的方法，其中出射场中存在维格纳负值的时间模式。我们通过级联系统模型的模拟从理论上证明，利用自旋-1/2发射体的脉冲相干或压缩驱动可以显著改进这种方法。这仅使用具有正高斯维格纳分布的驱动源态，就能确定性产生强维格纳负值态。该方法扩展到自旋-$S$（$S\geq 1$）发射体的驱动，以产生更奇异、高度非经典的状态。本工作中展示的状态阵列包括位移N光子态的近似、压缩薛定谔猫态以及有限能量Gottesman-Kitaev-Preskill（GKP）态。
英文摘要
Generating propagating Wigner-negative states of light is an important and difficult task for many quantum technologies. Historically, the proposed methods of creating such states have been intrinsically probabilistic, relying on conditional measurements or photon heralding. More recently, methods have been proposed involving the steady-state driving of two-level emitters, where Wigner-negative temporal modes are present in the outgoing field. We theoretically demonstrate through the simulation of a cascaded-systems model that this approach can be improved significantly with pulsed coherent or squeezed driving of a spin-1/2 emitter. This enables the deterministic generation of strongly Wigner-negative states, using only driving-source states with positive Gaussian Wigner distributions. This method is extended to the driving of a spin-$S$ emitter with $S\geq 1$ to generate still more exotic, highly non-classical states. The array of states demonstrated in this work includes close approximations to displaced N-photon states, squeezed Schrödinger cat states, and finite-energy Gottesman-Kitaev-Preskill (GKP) states.
