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arXiv quant-ph/0606221quant-phcond-mat.other
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铍离子薛定谔猫态亚散粒噪声干涉相位灵敏度

Sub Shot-Noise interferometric phase sensitivity with Beryllium ions Schroedinger Cat States

Luca Pezzé, Augusto Smerzi

摘要:

利用NOON量子态的干涉测量可以提供具有灵敏度缩放的无偏相位估计,如给定真实相移$θ$位于间隔$-π\leq θ\leq π$中的先验知识的$Δθ\sim 1/N_T$。该协议需要在$p$独立测量值之间(不均匀)分布总共$N_T = 2^{p}-1$粒子,并克服了之前提出的方法中存在的基本困难。我们证明了获得相位灵敏度击败经典的散粒噪声极限使用公布的概率实验检索到的薛定谔猫量子态包含高达N=6铍离子的创建的可能性。

英文摘要:

Interferometry with NOON quantum states can provide unbiased phase estimation with a sensitivity scaling as $Δθ\sim 1/N_T$ given a prior knowledge that the true phase shift $θ$ lies in the interval $-π\leq θ\leq π$. The protocol requires a total of $N_T = 2^{p}-1$ particles (unequally) distributed among $p$ independent measurements and overcomes basic difficulties present in previously proposed approaches. We demonstrate the possibility to obtain a phase sensitivity beating the classical shot-noise limit using published probabilities retrieved experimentally for the creation of Schrödinger cat quantum states containing up to N=6 beryllium ions.

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。

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