论文标题
两组分玻色污水的远程状态制备
Remote state preparation of two-component Bose-Einstein condensates
论文作者
论文摘要
为旋转合奏提出了用于远程状态准备的协议，其目的是在远程旋转集合上使用纠缠，局部旋转，局部旋转旋转和Fock的测量来制备具有给定的自旋期望值的状态。热原子集合或纺纱玻璃体冷凝物可以实现自旋集合。该协议的工作原理超出了荷斯坦 - 普罗里马科夫近似，因此可以制备全布洛赫球体的自旋期望值。主要的实际障碍是在旋转合奏之间制备最大纠缠状态。为了克服这一点，我们根据两轴两旋（2A2S）的哈密顿量使用状态来检查最大纠缠状态并检查其性能。我们发现，具有2A2S的协议的版本挤压良好的最大纠缠状态，以便可以远程准备旋转平均值。我们评估了使用2A2S挤压状态的误差，并发现它随整体尺寸而减小。随着选择后，错误可能会进一步减少。
A protocol for remote state preparation is proposed for spin ensembles, where the aim is to prepare a state with a given set of spin expectation values on a remote spin ensemble using entanglement, local spin rotations, and measurements in the Fock basis. The spin ensembles could be realized by thermal atomic ensembles or spinor Bose-Einstein condensates. The protocol works beyond the Holstein-Primakoff approximation, such that spin expectation values for the full Bloch sphere can be prepared. The main practical obstacle is the preparation of the maximally entangled state between the spin ensembles. To overcome this, we examine using states based on the two-axis two-spin (2A2S) Hamiltonian in place of the maximally entangled state and examine its performance. We find that the version of the protocol with 2A2S squeezing well-approximates the maximally entangled state, such that spin averages can be remotely prepared. We evaluate the errors of using 2A2S squeezed states, and find that it decreases with the ensemble size. With post-selection, errors can be systematically decreased further.
