Dynamics in quantum metrology

量子计量动力学

• 批准号: 312936166
• 负责人: Professor Dr. Daniel Braun
• 金额: --
• 依托单位: Institut für Theoretische Physik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/312936166?language=en
• 关键词: Dynamics; quantum; metrology

The projet has three main objectives: Firstly, we want to examine the influence of the dynamics of measurements in quantum metrology. In particular, we want to investigate, how the best possible sensitivity scales with measurement time in different scenarios ranging from integrable dynamics, over dynamics with a mixed classical phase space, up to chaotic dynamics. We would like to understand in detail whether the dynamics aspect can lead to a "quantum enhancement" compared to classical sensors, both for driven and holonomic quantum sensors, and if so, to what extent the quantum enhancement allows one to escape from the decoherence dilemma that plagues so far existing quantum enhanced sensors. Secondly, we would like to develop a new quantifier for the best possible sensitivity that comes closer to the experimental world. The new quantifier should take into account prior information about the parameters to be measured, deliver confidence intervals, and output sensitivities per square root of Hertz. Thirdly, we want to propose concrete concepts for novel quantum enhanced sensors that are relevant for the quantum hybrid systems investigated in the SFB/TRR 21 and that can be realized there experimentally.

该项目有三个主要目标：首先，我们想要检查量子计量中测量动力学的影响。特别是，我们想要研究，在不同的情况下，从可积动力学，混合经典相空间的动力学，到混沌动力学，最佳灵敏度是如何随测量时间变化的。我们想详细了解动力学方面是否可以导致与经典传感器相比的“量子增强”，无论是驱动的还是完整的量子传感器，如果是这样，量子增强在多大程度上允许人们摆脱迄今为止困扰现有量子增强传感器的退相干困境。其次，我们希望开发一种新的量词，以获得尽可能高的灵敏度，使其更接近实验世界。新的量化器应该考虑有关待测参数的先验信息，提供置信区间和每赫兹平方根的输出灵敏度。第三，我们希望提出与SFB/TRR 21研究的量子混合系统相关的新型量子增强传感器的具体概念，并可以在实验中实现。