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相关概念视频

The de Broglie Wavelength02:32

The de Broglie Wavelength

In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...

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相关实验视频

Updated: Jun 14, 2026

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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来自电信C波段量子点的连贯光散射.

L Wells1,2, T Müller3, R M Stevenson1

  • 1Toshiba Research Europe Limited, 208 Science Park, Milton Road, Cambridge, CB4 0GZ, UK.

Nature communications
|December 15, 2023
PubMed
概括

研究人员使用InAs/InP量子点产生了具有长相干时间的电信波长光子. 这一突破推动了量子网络的安全通信和分布式量子计算.

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科学领域:

  • 量子光子学 量子光子学
  • 固态量子发射器是一种固态量子发射器.

背景情况:

  • 量子网络需要连贯的光源在电信波长,以光纤为基础的实现.
  • 现有的源与可见到近红外范围的富里埃有限发射和超自然线宽扎.

研究的目的:

  • 通过使用InAs/InP量子点在电信波长上演示长相干时间光子.
  • 为了实现实际的基于光纤的量子通信和计算.

主要方法:

  • 利用来自InAs/InP量子点的激发激光光子的弹性和不弹性散射.
  • 测量相对于富里埃极限的相对光子相干时间.
  • 经过25公里的光纤,证明了两光子干扰.

主要成果:

  • 在电信波长中实现了相干时间显著超过富里埃极限的光子.
  • 不弹性散射的光子也表现出接近富里埃极限的连贯时间.
  • 证实了25公里光纤上的100,000个刺激周期相隔的光子的有限干扰可见性.

结论:

  • InAs/InP量子点是基于光纤的量子网络的有希望的来源.
  • 证明了使用这些源的长距离量子通信和分布式量子计算的潜力.