arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1201.6597quant-phphysics.atom-ph
收藏

单原子超快自旋运动纠缠与干涉

Ultrafast Spin-Motion Entanglement and Interferometry with a Single Atom

J. Mizrahi, C. Senko, B. Neyenhuis, K. G. Johnson, W. C. Campbell, C. W. S. Conover, C. Monroe

摘要:

我们报道了在小于3 ns的时间尺度内,单原子超精细自旋态与其运动态的纠缠。我们设计了一个短的强激光脉冲训练,以传递+/- 2毫巴k的自旋相关动量转移。利用动量反冲对,我们建立了一个原子干涉仪,并证明了自旋相干性的崩溃和复苏的运动波包分裂和重组。只有当第二次反冲延迟谐波陷阱周期的整数倍时,才会发生一对反冲后的复活,谐波陷阱周期是自旋与运动纠缠和解纠缠的标志。这种量子控制开启了原子量子比特中超快纠缠的新机制。

英文摘要:

We report entanglement of a single atom's hyperfine spin state with its motional state in a timescale of less than 3 ns. We engineer a short train of intense laser pulses to impart a spin-dependent momentum transfer of +/- 2 hbar k. Using pairs of momentum kicks, we create an atomic interferometer and demonstrate collapse and revival of spin coherence as the motional wavepacket is split and recombined. The revival after a pair of kicks occurs only when the second kick is delayed by an integer multiple of the harmonic trap period, a signature of entanglement and disentanglement of the spin with the motion. Such quantum control opens a new regime of ultrafast entanglement in atomic qubits.

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。

↑