摘要翻译:
二能级系统(自旋、原子)的密度矩阵通常是通过测量Pauli矢量的三个非交换分量来确定的。该密度矩阵也可以通过两个交换变量的测量数据,使用一个单一的设备来获得。这是通过将二能级系统耦合到一个辐射场模式来实现的,其中原子与场的相互作用用Jaynes-Cummings模型来描述。模式从一个已知的相干态开始演化。通过测量原子的布居差和光场的光子数这两个相互交换的可观测项,发现了原子的未知初始态。我们讨论了这种设置的优点及其可能的应用。
---
英文标题:
《Quantum state tomography using a single apparatus》
---
作者:
B. Mehmani, A. E. Allahverdyan, Th. M. Nieuwenhuizen
---
最新提交年份:
2008
---
分类信息:
一级分类:Physics 物理学
二级分类:Quantum Physics 量子物理学
分类描述:Description coming soon
描述即将到来
--
一级分类:Physics 物理学
二级分类:Statistical Mechanics 统计力学
分类描述:Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变,热力学,场论,非平衡现象,重整化群和标度,可积模型,湍流
--
---
英文摘要:
The density matrix of a two-level system (spin, atom) is usually determined by measuring the three non-commuting components of the Pauli vector. This density matrix can also be obtained via the measurement data of two commuting variables, using a single apparatus. This is done by coupling the two-level system to a mode of radiation field, where the atom-field interaction is described with the Jaynes--Cummings model. The mode starts its evolution from a known coherent state. The unknown initial state of the atom is found by measuring two commuting observables: the population difference of the atom and the photon number of the field. We discuss the advantages of this setup and its possible applications.
---
PDF链接:
https://arxiv.org/pdf/708.1918