A new scheme for a double-slit experiment in the time domain is presented. Phase-stabilized few-cycle laser pulses open one to two windows (``slits'') of attosecond duration for photoionization. Fringes in the angle-resolved energy spectrum of varying visibility depending on the degree of which-way information are observed. A situation in which one and the same electron encounters a single and a double slit at the same time is discussed. The investigation of the fringes makes possible interferometry on the attosecond time scale. The number of visible fringes, for example, indicates that the slits are extended over about 500as.
We provide support for the claim that momentum is conserved for individual events in the electron double slit experiment. The natural consequence is that a physical mechanism is responsible for this momentum exchange, but that even if the fundamental mechanism is known for electron crystal diffraction and the Kapitza-Dirac effect, it is unknown for electron diffraction from nano-fabricated double slits. Work towards a proposed explanation in terms of particle trajectories affected by a vacuum field is discussed. The contentious use of trajectories is discussed within the context of oil droplet…
The interference pattern produced by a quantum particle in Young's double-slit setup is attributed to the particle's wavefunction having gone through both slits. In the path integral formulation, this interference involves a superposition of paths, going through either slit, linking the source to the detection point. We show how these paths superpositions can in principle be observed by implementing a series of minimally-perturbing weak measurements between the slits and the detection plane. We further propose a simplified protocol in order to observe these "weak trajectories" with single phot…
基于量子力学高斯色散（Groessing et al. 2010）以及两个高斯干涉（Groessing et al. 2012）的经典解释的重新表述，我们提出了一种新的更实用的模拟方法。量子力学的“波包的衰减“可以用反常的亚量子扩散来描述，由于粒子的热环境变化，特定的扩散率随时间变化。在对不同缝宽的双缝实验的模拟中，这种新方法的相位可以作为一个局部量来实现。我们描述了扩散率的条件，并通过连接到波动力学，我们计算精确的量子力学强度分布，以及相应的轨迹分布根据两个高斯波包从双缝中出现的速度场。我们还计算了概率密度电流分布，包括移相器影响单个狭缝电流的情况，并提供了计算机模拟。
In the the double-slit experiment, nonclassical paths are Feynman paths that go through both slits. Prior work with atom cavities as which-way detectors in the double-slit experiment has shown these paths to be experimentally inaccessible. In this paper, we show how such a setup can indeed detect nonclassical paths with 1% probability if one considers a different type of nonclassical path than previously investigated. We also show how this setup can be used to erase and restore the coherence of the nonclassical paths. Finally, we also show how atom cavities may be used to implement a exact mea…
Event-by-event simulation of double-slit experiments with single photons
我们提出了一个计算机模拟模型，再现，事件的事件，双缝和双光束干涉实验的波动力学结果。相同的模型还模拟了使用菲涅耳双棱镜的单光子干涉实验的一对一副本（Jacques V. EUR. J. D，35（2005）561）。该模型满足爱因斯坦的局部因果关系标准，并且完全基于实验事实，包括实验中使用的设备和对单个探测器点击的观察。我们的结果证明了对单光子双缝实验进行粒子描述是可能的。
We present a fully local treatment of the double slit experiment in the formalism of quantum field theory. Our exposition is predominantly pedagogical in nature and exemplifies the fact that there is an entirely local description of the quantum double slit interference that does not suffer from any supposed paradoxes usually related to the wave-particle duality. The wave-particle duality indeed vanishes in favour of the field picture in which particles should not be regarded as the primary elements of reality and only represent excitations of some specific field configurations. Our treatment i…
We provide a semiclassical description of the double-slit experiment based on momentous quantum mechanics, where the implementation of canonical variables facilitate the derivation of the equations of motion for the system. We show the evolution of individual particles and their semiclassical trajectories, collectively reproduce the well-known quantum interference pattern. It is found that the non-crossing rule for trajectories, present in Bohmian mechanics, is not required under our treatment. We are able to follow classical configuration variables from this semiclassical scheme, and discuss …
Negative probabilities and Counterfactual Reasoning on the double-slit Experiment
本文试图从基本原理出发，建立负（准）几率分布理论，并将其应用于量子力学双缝实验的研究。我们这样做的方式保留了主要概念问题的完整性，但通过用马赫-曾德干涉仪来表示双缝实验，可以进行更清晰的分析，并表明与双缝相关的量子系统的主要特征也存在于马赫-曾德干涉仪中。这将问题从连续随机变量表示转换为离散随机变量表示。然后，我们表明，马赫-曾德尔干涉仪，不存在负概率是一致的干扰和哪些路径的信息，相反，费曼认为。然而，与Scully et al.的实验，如果我们减少有关系统的实验信息量，并依靠反事实推理，可以为Mach-Zehnder实验构造一个联合负概率分布。
Shahriar S. Afshar claimed that his 2007 modified version of the double-slit experiment violates complementarity [1]. He makes two modifications to the standard double-slit experiment. First, he adds a wire grid that is placed in between the slits and the screen at locations of interference minima. The second modification is to place a converging lens just after the wire grid. The idea is that the wire grid implies the existence of interference minima(wave-like behavior), while the lens can simultaneously obtain which-way information (particle-like behavior). More recently, John G. Cramer [2] …
Reply to: Comment on "Bohmian prediction about a two double-slit experiment and its disagreement with SQM"
在最近的一篇论文中，Struyve等人[Struyve W，De Baere W，De Neve J and De Weirdt S 2003 J. Phys. A 36 1525]试图证明[Golshani M and Akhavan O 2001 J. Phys. A 34 5259，quant-ph/0103101]中提出的思想实验不能区分标准和Bohmian量子力学。在这里，我们要表明，尽管他们反对，我们的结论仍然成立。
