论文标题
嘈杂量子状态的力量和资源稀释的优势
The power of noisy quantum states and the advantage of resource dilution
论文作者
论文摘要
纠缠蒸馏允许将嘈杂的量子状态转换为单线,这又可以用于各种量子技术任务,例如量子传送和量子键分布。纠缠稀释是相反的过程:单线被转换为纠缠较少的量子状态。虽然蒸馏的有用性显而易见,但纠缠稀释的实际应用并不那么明显。在这里,我们表明纠缠稀释可以增加共享量子状态对局部噪声的弹性。即使将单线稀释到任意纠缠的州,也会观察到提高的弹性。我们将分析扩展到其他量子资源理论,例如量子相干,量子热力学和纯度。对于这些资源理论,我们证明将纯量子状态稀释到噪声方面可能是保护系统免受噪声的有利优势。我们的结果证明了量子资源稀释的有用性,并提供了一个罕见的例子,以使噪声量子状态比量子信息处理中的纯状态的优势。
Entanglement distillation allows to convert noisy quantum states into singlets, which can in turn be used for various quantum technological tasks, such as quantum teleportation and quantum key distribution. Entanglement dilution is the inverse process: singlets are converted into quantum states with less entanglement. While the usefulness of distillation is apparent, practical applications of entanglement dilution are less obvious. Here, we show that entanglement dilution can increase the resilience of shared quantum states to local noise. The increased resilience is observed even if diluting singlets into states with arbitrarily little entanglement. We extend our analysis to other quantum resource theories, such as quantum coherence, quantum thermodynamics, and purity. For these resource theories, we demonstrate that diluting pure quantum states into noisy ones can be advantageous for protecting the system from noise. Our results demonstrate the usefulness of quantum resource dilution, and provide a rare example for an advantage of noisy quantum states over pure states in quantum information processing.