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The de Broglie Wavelength02:32

The de Broglie Wavelength

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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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Generation and Coherent Control of Pulsed Quantum Frequency Combs
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用线性光学进行高效的量子计算的方案.

E Knill1, R Laflamme, G J Milburn

  • 1Los Alamos National Laboratory, MS B265, Los Alamos, New Mexico 87545, USA. knill@lanl.gov

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|May 9, 2001
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此摘要是机器生成的。

这项研究表明,高效的量子计算只使用基本的光学元件和反,克服了可扩展量子技术之前的局限性. 这些方法具有针对错误的稳定性,并且在当前的实验能力下是可行的.

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科学领域:

  • 量子信息科学 量子信息科学
  • 量子计算是一种量子计算.
  • 光子学 是一个光子学.

背景情况:

  • 量子计算机为复杂的问题提供了显著的优势,如大整数分解和量子模拟.
  • 实现可靠和可扩展的量子计算元素是该领域的一个重大挑战.
  • 早期使用光子的量子计算建议需要困难的非线性合.

研究的目的:

  • 为了证明高效的量子计算,只使用线性光学元件和光子检测.
  • 克服之前光子量子计算提案的局限性.
  • 开发针对光子损失和探测器低效率的强有力的方法.

主要方法:

  • 使用光束分割器,相位变换器,单光子源和光电探测器.
  • 实施基于光探测器输出的反机制.
  • 设计一个依赖光子干扰和检测的系统.

主要成果:

  • 只有使用线性光学元件才能实现高效的量子计算.
  • 提出的方法证明了对常见的错误源的稳定性,例如光子损失.
  • 所需的基本元素与当前的实验技术兼容.

结论:

  • 可扩展和可靠的光子量子计算在没有非线性光学元件的情况下是可行的.
  • 反控制的线性光学为构建量子计算机提供了一个实用的途径.
  • 这种方法推进了量子计算的实验实现与当前技术.