Entangling neutrons via successive scattering from a substrate

Entangling successive single-photons from quantum dots

A method is proposed for generating and discriminating Bell states of high fidelity from consecutive single-photons generated in a semiconductor quantum dot. The use of a non-symmetric beam splitter is found to be essential and sufficient, and no nonlinear optical process such as SPDC is required at any stage. This should be of considerable importance for testing the foundations of quantum mechanics.

基于相对论运动的通用量子计算机

A Universal Quantum Computer From Relativistic Motion

本研究提出一种基于相对论运动的变分量子线路通用量子计算架构，通过量子场介导纠缠与调控量子比特运动构建通用门集，推导了保真度下界并验证了量子傅里叶变换的实现可行性。

Sustainable entanglement production from a quantum field

We propose a protocol by which entanglement can be extracted repeatedly from a quantum field. In analogy with prior work on entanglement harvesting, we call this protocol entanglement farming. It consists of successively sending pairs of unentangled particles through an optical cavity. Using non-perturbative Gaussian methods, we show that in certain generic circumstances this protocol drives the cavity field towards a non-thermal metastable state. This state of the cavity is such that successive pairs of unentangled particles sent through the cavity will reliably emerge significantly entangled…