基于双电子自旋与纳米机械谐振子强耦合的纠缠态制备

Preparation of Entangled States Based on Strong Coupling Between Double Electron Spins and Nano-Mechanical Harmonic Oscillator

以金刚石氮空位(NV)色心为基础,提出了一种双电子自旋与量子化的纳米机械谐振子间的强耦合方案,利用谐振子的耗散过程制备了两比特二维纠缠稳态。数值模拟结果表明,具有不同初态的系统均可演化得到高保真、高纠缠的目标态。该方案减小了耗散对系统演化的破坏,对品质因子无要求,降低了实验的操作难度,具有很高的可靠性和可行性。

A scheme of strong coupling between the double electron spins and the quantized nano-mechanical harmonic oscillator is proposed based on the diamond nitrogen vacancy（NV）color center.A two-dimensional entangled state of two qubits is prepared by using the dissipative process of the nano-mechanical harmonic oscillator.The numerical simulation results show that,all the systems with different initial states can evolve to the target states with a high fidelity and a high entanglement.This scheme reduces the influence of the dissipation on the system evolution,has no requirement on the quality factors and reduces the experimental operation difficulty,which is proved to possess strong reliability and feasibility.