School of Mathematical Sciences, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom.
Phys Rev Lett. 2010 Jun 18;104(24):240501. doi: 10.1103/PhysRevLett.104.240501. Epub 2010 Jun 14.
We study state engineering through bilinear interactions between two remote qubits and two-mode gaussian light fields. The attainable two-qubit states span the entire physically allowed region in the entanglement-versus-global-purity plane. Two-mode gaussian states with maximal entanglement at fixed global and marginal entropies produce maximally entangled two-qubit states in the corresponding entropic diagram. We show that a small set of parameters characterizing extremally entangled two-mode gaussian states is sufficient to control the engineering of extremally entangled two-qubit states, which can be realized in realistic matter-light scenarios.
我们通过两个远程量子位和双模高斯光场之间的双线性相互作用来研究态工程。可实现的两量子比特态跨越了纠缠与全局纯度平面上整个物理允许的区域。在固定全局和边缘熵的情况下，具有最大纠缠的双模高斯态在相应的熵图中产生最大纠缠的两量子比特态。我们表明，一组描述极端纠缠的双模高斯态的参数足以控制极端纠缠的两量子比特态的工程，这在现实的物质-光场景中是可以实现的。
