携带轨道角运动量的混合纠
Fengyi Xu1, Meihong Wang2, Chenyu Qiao1
1State Key Laboratory of Quantum Optics Technologies and Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, China.
Science bulletin
|January 21, 2025
概括
研究人员使用轨道角动量 (OAM),极化和猫状态创建了混合纠. 这种新的量子资源增强了混合量子处理和通信的信息能力.
科学领域:
- 量子信息科学 量子信息科学
- 量子光学是一种量子光学.
- 量子通信是一种量子通信.
背景情况:
- 混合纠结合了连续变量 (CV) 和离散变量 (DV) 量子状态,比单独的CV和DV协议提供了优势.
- 在纠状态中增加自由度可以增强信息能力.
- 轨道角动量 (OAM) 是量子通信和精确测量的有前途的自由度.
研究的目的:
- 实验性地准备混合纠,将轨道角动量 (OAM) 纳入其中.
- 研究多度自由度纠对于先进的量子信息处理的潜力.
主要方法:
- 利用一个q-盘来转换光学猫状态的波面,引入OAM.
- 在极化编码的DV量子位和猫编码的CV量子位之间产生混合纠.
- 测量了拓电荷,并重建了维格纳函数以验证纠.
主要成果:
- 成功准备的混合纠状态携带OAM,具有拓电荷l=0,+1和+2.
- 通过非零对数负值证实了输出状态中纠的存在.
- 证明了将OAM纳入混合纠的可行性.
结论:
- 携带OAM的混合纠的实验准备是一项重大进展.
- 这项工作扩大了混合纠可用的自由度,创造了一个新的量子资源.
- 发达的混合纠状态在增强量子通信能力和测量精度方面具有潜在的应用.
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