Probing atomic 'quantum grating' by collisions with charged projectiles

通过纳米光栅处的物质波衍射探究 Casimir–Polder 相互作用的几何依赖性

Probing the geometry dependence of the Casimir-Polder interaction by matter-wave diffraction at a nano-grating

本研究比较计算 Casimir–Polder 势的多种近似与方法，分析其对纳米光栅物质波衍射图样的影响，并指出该作用在狭缝前后 25 nm 范围内均不可忽略。

Creating and probing long-range order in atomic clouds

Ultracold atoms interacting with the optical modes of a high-Q optical ring cavity can synchronize their motion. The collective behavior makes the system interesting for quantum computing applications. This paper is devoted to the study of the collective coupling. We report on the first observation of a collective dynamics and on the realization of a laser, the gain mechanism of which is based on collective atomic recoil. We show that, if the atoms are subject to a friction force, starting from an unordered distribution they spontaneously form a moving density grating. Furthermore, we demonstr…

Probing the electron charge distribution via Kapitza-Dirac diffraction

We analyze the diffraction of elementary systems as the electron by light gratings when they are described by charge distributions instead of the usual point-like form. The treatment of the problem is based on the introduction, in analogy with atomic polarizability, of state-dependent non-permanent multi-pole moments for the charge. The diffraction patterns can provide bounds on these moments. With this approach we can experimentally explore some aspects of the interpretation of the wave picture of single charges.

在分子 Talbot-Lau 干涉仪中探测手性 Casimir-Polder 力的要求

Requirements for probing chiral Casimir-Polder forces in a molecular Talbot-Lau interferometer

本文理论分析三光栅分子 Talbot-Lau 干涉仪中手性 CP 力的探测条件，表明手性涂层或材料可增强对映体选择性，并在非迟滞区产生与电、磁效应可比的信号。

Probing Macroscopic Quantum Superpositions with Nanorotors

Whether quantum physics is universally valid is an open question with far-reaching implications. Intense research is therefore invested into testing the quantum superposition principle with ever heavier and more complex objects. Here we propose a radically new, experimentally viable route towards studies at the quantum-to-classical borderline by probing the orientational quantum revivals of a nanoscale rigid rotor. The proposed interference experiment testifies a macroscopic superposition of all possible orientations. It requires no diffraction grating, uses only a single levitated particle, a…

Colloquium: Quantum interference of clusters and molecules

We review recent progress and future prospects of matter wave interferometry with complex organic molecules and inorganic clusters. Three variants of a near-field interference effect, based on diffraction by material nanostructures, at optical phase gratings, and at ionizing laser fields are considered. We discuss the theoretical concepts underlying these experiments and the experimental challenges. This includes optimizing interferometer designs as well as understanding the role of decoherence. The high sensitivity of matter wave interference experiments to external perturbations is demonstra…