近日，西安交通大学李蓬勃团队研究了储层压缩对量子记忆辅助熵不确定性关系的影响。2025年3月17日，《物理评论A》杂志发表了这一成果。

熵不确定性原理对两个不相容的可观测值的测量精度施加了限制，当涉及量子存储器时，可以减少这一限制。课题组从理论上研究了当单独使用量子存储器或被测粒子和量子存储器通过保能相互作用与压缩真空浴相互作用时，量子存储器辅助熵不确定性关系的动力学。结果发现，在这两种情况下，储层的挤压阶段降低了熵不确定性（EU），而挤压强度增加了EU。

此外，研究组还发现，当被测粒子和量子存储器都受到共同的压缩真空浴时，EU可以显著降低。他们还通过探索量子不和谐和最小缺失信息之间的竞争，探索了控制EU行为的关键因素。课题组还研究了两种系统环境设置中熵不确定性界（EUB）的紧密性，并观察到当被测粒子和量子存储器都耦合到公共压缩真空浴时，EUB的紧密性较低。

附：英文原文

Title: Impact of reservoir squeezing on quantum-memory-assisted entropic uncertainty relations

Author: Hamad Ali, Abdul Basit, Peng-Bo Li

Issue&Volume: 2025/03/17

Abstract: The entropic uncertainty principle imposes a limit on how precisely two incompatible observables can be measured, which can be reduced when quantum memory is involved. We theoretically investigate the dynamics of the quantum-memory-assisted entropic uncertainty relation when either quantum memory alone or both the measured particle and the quantum memory interact with a squeezed-vacuum bath through energy-preserving interactions. We show that in both scenarios, the squeezing phase of the reservoir decreases the entropic uncertainty (EU), whereas the squeezing strength increases the EU. In addition, we find that EU can be significantly reduced when both the measured particle and quantum memory are subjected to a common squeezed-vacuum bath. Furthermore, we explore the key factors controlling the behavior of EU by exploring the competition between quantum discord and minimal missing information. Moreover, we examine the tightness of the entropic uncertainty bound (EUB) in both system-environment setups and observe that the EUB is less tight when both the measured particle and quantum memory are coupled to a common squeezed-vacuum bath.

DOI: 10.1103/PhysRevA.111.032418

Source: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.111.032418