小型对称性破缺测量装置的量子动力学
Quantum dynamics of a small symmetry breaking measurement device
摘要：
构造了一种利用对称性破缺来增强微观信号的量子测量仪器。整个量子系统由一个系统-设备-环境三元组组成，该三元组由一小组自旋为1/2的粒子组成。该装置是一个铁磁体，测量单个自旋的$z$分量。一个完整的量子多体计算允许仔细检查相位相干性的损失，系统-设备相关性的形成和放大，注册的不可逆性，容错性和设备的偏置。
英文摘要：
A quantum measuring instrument is constructed that utilises symmetry breaking to enhance a microscopic signal. The entire quantum system consists of a system-apparatus-environment triad that is composed of a small set of spin-1/2 particles. The apparatus is a ferromagnet that measures the $z$-component of a single spin. A full quantum many-body calculation allows for a careful examination of the loss of phase coherence, the formation and amplification of system-apparatus correlations, the irreversibility of registration, the fault tolerance, and the bias of the device.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
