论文标题
LHC的顶级夸克纠缠和量子断层扫描
Entanglement and quantum tomography with top quarks at the LHC
论文作者
论文摘要
纠缠是量子力学中的核心主题。由于其真正的相对论行为和基本性质，高能量的围墙是对量子力学基本方面的实验研究的有吸引力的系统。我们提出了在LHC的顶级Quark对旋转之间纠缠的检测，代表了一对夸克中的第一个纠缠检测提案，以及迄今为止最高能量尺度的纠缠观察。我们表明，可以通过直接测量由顶部抗物对衰变产生的脑部之间的角度分离来观察纠缠。使用在LHC运行2期间记录的当前数据，可以以高统计显着性来实现检测。此外，我们开发了一个简单的方案，用于顶级对对的量子断层扫描。该实验技术重建了系统的量子状态，为测试理论预测提供了一种新的实验工具。我们的工作明确地在两Q Q Q Q Q量的高能系统的量子信息中明确实施了规范实验技术，从而铺平了使用高能量煤层的方式来研究量子信息方面。
Entanglement is a central subject in quantum mechanics. Due to its genuine relativistic behavior and fundamental nature, high-energy colliders are attractive systems for the experimental study of fundamental aspects of quantum mechanics. We propose the detection of entanglement between the spins of top-antitop-quark pairs at the LHC, representing the first proposal of entanglement detection in a pair of quarks, and also the entanglement observation at the highest energy scale so far. We show that entanglement can be observed by direct measurement of the angular separation between the leptons arising from the decay of the top-antitop pair. The detection can be achieved with high statistical significance, using the current data recorded during Run 2 at the LHC. In addition, we develop a simple protocol for the quantum tomography of the top-antitop pair. This experimental technique reconstructs the quantum state of the system, providing a new experimental tool to test theoretical predictions. Our work explicitly implements canonical experimental techniques in quantum information in a two-qubit high-energy system, paving the way to use high-energy colliders to also study quantum information aspects.
