Quantum metrology in a non-Markovian quantum evolution

Mirkin, Nicolás; Larocca, Martin; Wisniacki, Diego

doi:10.48550/arxiv.1912.04675

Cited by 2 publications

(2 citation statements)

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“…In this sense, the probe and its surrounding environment form an open quantum system [32][33][34], which implies the estimation performance can be severely influenced by the environment. To gain a global view and more physical insight into the quantum * wuw@lzu.edu.cn parameter estimation problem, the estimation scheme should be investigated within the framework of quantum dissipative dynamics and how to degrade the noise's impact should be taken into account [35][36][37][38]. Almost all the existing studies of parameter estimation in a noisy environment restricted their attentions to some exactly solvable situations.…”

Section: Introductionmentioning

confidence: 99%

Quantum parameter estimation in a dissipative environment

Shi

2020

Phys. Rev. A

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We investigate the performance of quantum parameter estimation based on a qubit-probe in a dissipative bosonic environment beyond the traditional paradigm of weak-coupling and rotating wave approximations. By making use of an exactly numerical hierarchical equations of motion method, we analyze the influences of the non-Markovian memory effect induced by the environment and the form of probe-environment interaction on the estimation precision. It is found that (i) the non-Markovainity can effectively boost the estimation performance; and (ii) the estimation precision can be improved by introducing a perpendicular probe-environment interaction. Our results indicate the scheme of parameter estimation in a noisy environment can be optimized via engineering the decoherence mechanism.

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Section: Introductionmentioning

confidence: 99%

Quantum parameter estimation in a dissipative environment

Shi

2020

Phys. Rev. A

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“…Quantum discrimination and quantum estimation underlie many applications in quantum information science, including quantum hypothesis testing, quantum detec-tion and quantum sensing. While quantum control has been employed to improve the precision in quantum estimation [47][48][49][50][51][52][53][54][55][56], the use of quantum control in quantum discrimination remains scarce [57,58]. This is so despite the fact that one may expect quantum control to help identify fundamental performance bounds of quantum discrimination, similar to those found for quantum computation [6,59], or derive pulse shapes for improved performance with direct relevance to experiments [8,60].…”

Section: Introductionmentioning

confidence: 99%

Optimally controlled quantum discrimination and estimation

Basilewitsch,

Yuan,

Koch

2020

Preprint

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Quantum discrimination and estimation are pivotal for many quantum technologies, and their performance depends on the optimal choice of probe state and measurement. Here we show that their performance can be further improved by suitably tailoring the pulses that make up the interferometer. Developing an optimal control framework and applying it to the discrimination and estimation of a magnetic field in the presence of noise, we find an increase in the overall achievable state distinguishability. Moreover, the maximum distinguishability can be stabilized for times that are more than an order of magnitude longer than the decoherence time.

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Quantum metrology in a non-Markovian quantum evolution

Cited by 2 publications

References 44 publications

Quantum parameter estimation in a dissipative environment

Quantum parameter estimation in a dissipative environment

Optimally controlled quantum discrimination and estimation

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