论文标题
通过量子zeno效应在有色噪声中纠缠增强的量子计量
Entanglement-Enhanced Quantum Metrology in Colored Noise by Quantum Zeno Effect
论文作者
论文摘要
在开放量子系统中，计量学的精度不可避免地会遭受噪声的损害。 {在马尔可夫开放的量子动力学中，尽管测量时间有效地缩短了，但不能通过使用纠缠探针来提高精度。}但是，十年前预测，在非马克维亚人中，在非马克维亚人中，误差可以通过量子Zeno效应（qze）[qe，Huelga和Plenio，Plenio，Phershio，Phys Phys Phersich ofers ofer of the Markovian。莱特牧师。 \ textbf {109}，233601（2012）]。在这项工作中，我们应用了最近开发的量子模拟方法来实验验证纠缠探针可以提高QZE的计量学精度。最多$ n = 7 $ Qubits，我们证明了精度已提高了$ n^{1/4} $的一倍，这与理论预测一致。我们的量子模拟方法可以为各种量子计量方案的实验验证提供一个有趣的平台。
In open quantum systems, the precision of metrology inevitably suffers from the noise. {In Markovian open quantum dynamics, the precision can not be improved by using entangled probes although the measurement time is effectively shortened.} However, it was predicted over one decade ago that in a non-Markovian one, the error can be significantly reduced by the quantum Zeno effect (QZE) [Chin, Huelga, and Plenio, Phys. Rev. Lett. \textbf{109}, 233601 (2012)]. In this work, we apply a recently-developed quantum simulation approach to experimentally verify that entangled probes can improve the precision of metrology by the QZE. Up to $n=7$ qubits, we demonstrate that the precision has been improved by a factor of $n^{1/4}$, which is consistent with the theoretical prediction. Our quantum simulation approach may provide an intriguing platform for experimental verification of various quantum metrology schemes.
