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用光纤合的宽带量子内存用于极化编码的光子量子比特
Sandra Cheng1, Carson Evans1, Todd Pittman1
1Department of Physics and Quantum Science Institute, University of Maryland Baltimore County, Baltimore, MD USA.
NPJ quantum information
|October 20, 2025
概括
我们开发了一种光纤合量子内存平台,用于量子网络,实现~54%的传输效率. 该设备能够高保真地存储和检索量子信息,这对于未来的量子通信网络至关重要.
科学领域:
- 量子信息科学 量子信息科学
- 光学和光子学 在光学和光子学.
- 量子网络是一个量子网络.
背景情况:
- 量子网络需要高效,可靠的量子内存设备.
- 纤维合的光子量子记忆对于将量子设备集成到现有基础设施中至关重要.
- 低损耗和高效率的量子记忆对于短期量子网络应用至关重要.
研究的目的:
- 为了展示一个光纤合的循环交换机量子内存平台.
- 描述不同存储周期的量子内存的效率和性能.
- 为了研究内存寿命和量子比特可访问性之间的权衡.
主要方法:
- 实现量子内存的光纤合循环交换机架构.
- 用循环次数 (N) 来测量通过效率和存储效率的缩放.
- 使用不同的存储周期时间 (~40 ns和~0.5 μs) 测试超宽带单光子极化量子位的存储和检索保真度.
主要成果:
- 实现了大约54%的传输效率.
- 证明了总体存储效率,规模为~0.5^(N+1),其中N是存储周期的数量.
- 展示了单光子偏振量子比特的高保真性存储和检索,用于短 (~ 40 ns) 和长 (~ 0.5 μs) 的存储周期时间.
结论:
- 展示的光纤合量子内存平台为近期量子网络应用提供了一个有前途的解决方案.
- 该平台展示了内存寿命和量子比特可访问性之间的权衡,可以通过调整存储周期时间来管理.
- 高保真量子比特操作是可以实现的,为强大的量子通信系统铺平了道路.
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