论文标题
通过非古典时间相关性增强的滴答性能
Ticking-clock performance enhanced by nonclassical temporal correlations
论文作者
论文摘要
我们研究了非经典时间相关性在离散时间方案中提高滴答时钟性能中的作用。我们表明，用于滴答时钟的最佳模型的问题与违反了根据可能具有侵入性的连续测量来提出的leggett-garg型时间不平等，但在具有有限的内存能力的系统上。滴答时钟激发了一个时间不平等的家族的推导，尽管不涉及输入，但仍显示古典相关和量子相关之间存在差距。我们表明，超出经典界限以外的量子滴答锁定模型也违反了有限序列的leggett-garg型时间不等式的量子，我们研究了它们的持续时间限制。有趣的是，我们表明，在离散时间方案中，最佳的经典时钟模型没有定义明确的连续时限制，这是量子模型中不存在的功能。
We investigate the role of nonclassical temporal correlations in enhancing the performance of ticking clocks in a discrete-time scenario. We show that the problem of optimal models for ticking clocks is related to the violation of Leggett-Garg-type temporal inequalities formulated in terms of, possibly invasive, sequential measurements, but on a system with a bounded memory capacity. Ticking clocks inspire the derivation of a family of temporal inequalities showing a gap between classical and quantum correlations, despite involving no input. We show that quantum ticking-clock models achieving accuracy beyond the classical bound are also those violating Leggett-Garg-type temporal inequalities for finite sequences and we investigate their continuous-time limit. Interestingly, we show that optimal classical clock models in the discrete-time scenario do not have a well-defined continuous-time limit, a feature that is absent in quantum models.
