相关实验视频
Updated: Jul 17, 2026

06:42
Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
对光学信息与物质波动力学的一致控制
Naomi S Ginsberg1, Sean R Garner, Lene Vestergaard Hau
1Department of Physics, and Division of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, USA.
Nature
|February 9, 2007
概括
科学家通过将光脉冲转化为物质波来在两个波斯-爱因斯坦凝聚体之间传输信息. 这种量子控制技术使用原子物质波动力学来存储和恢复光脉冲.
科学领域:
- 量子光学和原子物理学.
- 在斯-爱因斯坦凝结体中探索光物质相互作用.
背景情况:
- 在用光操纵物质和相反方面取得了重大进展.
- 寒冷,密集的原子云和共振激光场为研究提供了丰富的系统.
- 波斯-爱因斯坦凝结体 (BECs) 中的超慢光传播展示了极端的光操纵.
研究的目的:
- 为了证明两个空间分离的斯-爱因斯坦凝聚体之间的缓慢光脉冲的存储和恢复.
- 通过将光脉冲转化为移动的物质波来显示信息传输.
主要方法:
- 在存在合场的情况下,将探头激光脉冲注入BEC并进行空间压缩.
- 光脉冲转化为原子叠加状态 (静止和反弹组件).
- 通过反弹的原子"信使"波传输印记的振幅和相位信息.
- 从第二个BEC中恢复光脉冲,用合激光重新照明并连贯添加信使脉冲.
主要成果:
- 成功存储并随后从一个单独的BEC,160微米远的缓慢光脉冲中恢复.
- 通过将光脉冲转化为移动的物质波来证明信息传输.
- 恢复的光脉冲准确地记录了原子印记的相对幅度和相位.
结论:
- 提供了连贯的光学信息处理的戏剧性演示,利用物质波动力学.
- 突出了量子控制在量子信息处理和波函数雕塑中的应用潜力.
相关概念视频
The Wave Nature of Light
The nature of light has been a subject of inquiry since antiquity. In the seventeenth century, Isaac Newton performed experiments with lenses and prisms and was able to demonstrate that white light consists of the individual colors of the rainbow combined together. Newton explained his optics findings in terms of a "corpuscular" view of light, in which light was composed of streams of extremely tiny particles traveling at high speeds according to Newton's laws of motion.
Electromagnetic Waves in Matter
Electromagnetic waves can travel in the vacuum as well as in matter. For example light, which is an electromagnetic wave, can travel through air, water, or glass.
Consider the electromagnetic wave passing through a dielectric medium. In such a case, Maxwell's equations get modified. In Ampere's law, ε0 , the dielectric permittivity of free space is replaced with ε, the permittivity of dielectric. Also, the vacuum permeability μ0 is replaced by the permeability of the medium, μ.
Furthermore, the...
Consider the electromagnetic wave passing through a dielectric medium. In such a case, Maxwell's equations get modified. In Ampere's law, ε0 , the dielectric permittivity of free space is replaced with ε, the permittivity of dielectric. Also, the vacuum permeability μ0 is replaced by the permeability of the medium, μ.
Furthermore, the...
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...
Propagation of Waves
When a wave propagates from one medium to another, part of it may get reflected in the first medium, and part of it may get transmitted to the second medium. In such a case, the interface of the two mediums can be considered as a boundary that is neither fixed nor free.
Consider a scenario where a wave propagates from a string of low linear mass density to a string of high linear mass density. In such a case, the reflected wave is out of phase with respect to the incident wave, however the...
Consider a scenario where a wave propagates from a string of low linear mass density to a string of high linear mass density. In such a case, the reflected wave is out of phase with respect to the incident wave, however the...
Interference and Diffraction
Interference is a characteristic phenomenon exhibited by waves. When two electromagnetic waves interact with their peaks and troughs coinciding, a resulting wave with enhanced amplitude is produced. This is known as constructive interference. In this case, the two waves interacting are in phase with each other.
Interference and Superposition of Waves
When two waves of the same nature occur in the same region simultaneously, they result in interference. Interference of waves implies that the net effect of the waves is the sum of the individual waves' effects. However, it does not imply that the individual waves affect the propagation of other waves.
Interference occurs in mechanical waves, such as sound waves, waves on a string, and surface water waves. Mechanical waves correspond to the physical displacement of particles. Hence,...
Interference occurs in mechanical waves, such as sound waves, waves on a string, and surface water waves. Mechanical waves correspond to the physical displacement of particles. Hence,...

