经典和量子射击噪声之间的交叉在混乱的空洞中
S Oberholzer1, E V Sukhorukov, C Schönenberger
1Institut für Physik, Universität Basel, Klingelbergstrasse 82, 4056 Basel, Switzerland. Christian.Schoenberger@unibas.ch
Nature
|February 15, 2002
概括
研究人员通过实验验证,当电子运动成为经典的混乱时,中视导体中的射击噪声会消失. 这发生在电子停留时间很短的混乱空洞中,从量子散射过渡到确定性运动.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 量子运输是一种量子运输.
背景情况:
- 由于电荷离散而产生的Schottky噪声在1918年被预测出来.
- 介光导体中的射击噪声,涉及量子连贯电荷运动,是最近的一个研究重点.
研究的目的:
- 为了实验验证在经典的混沌介视导体中射击噪声消失的预测.
- 为了研究电子停留时间在混乱空洞中的作用,对射击噪声.
主要方法:
- 利用混乱的空洞来控制电子的停留时间.
- 将系统调整为量子散射和经典决定性的运动.
主要成果:
- 当电子运动被量子散射 (长停留时间) "涂抹"时,可以观察到射击噪声.
- 当电子运动成为经典的确定性 (短停留时间) 时,射击噪声会消失.
结论:
- 实验证实了在经典混乱的中镜系统中抑制射击噪声的实验证实.
- 证明量子效应和经典混沌动态影响电荷传输波动.
相关概念视频
The Quantum-Mechanical Model of an Atom
47.1K
Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing...
47.1K
Interference and Superposition of Waves
5.8K
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,...
5.8K
Sound Waves: Interference
4.2K
Sound waves can be modeled either as longitudinal waves, wherein the molecules of the medium oscillate around an equilibrium position, or as pressure waves. When two identical waves from the same source superimpose on each other, the combination of two crests or two troughs results in amplitude reinforcement known as constructive interference. If two identical waves, that are initially in phase, become out of phase because of different path lengths, the combination of crests with troughs...
4.2K
Shock Waves
2.1K
While deriving the Doppler formula for the observed frequency of a sound wave, it is assumed that the speed of sound in the medium is greater than the source's speed through it. When this condition is breached, a shock wave occurs.
When the source's speed approaches the speed of sound, constructive interference between successive wavefronts emitted by the source occurs immediately behind it. Initially, scientists believed that this constructive interference would result in such high...
When the source's speed approaches the speed of sound, constructive interference between successive wavefronts emitted by the source occurs immediately behind it. Initially, scientists believed that this constructive interference would result in such high...
2.1K
Electromagnetic Waves in Matter
2.8K
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,...
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,...
2.8K
Standing Waves in a Cavity
1.7K
A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
1.7K


