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Postępy Fizyki

Pomiary kwantowe A.D. 2023

Rafał Demkowicz-Dobrzański

Published Jun 20, 2023• 0 citations
Publisher

Abstract

In the article a quantum estimation theory perspective on the concept of quantum measurement is presented, as well as the latest theoretical and experimental developments in the field of quantum metrology, with particular focus on the contribution of a research group from the University of Warsaw to the development of theoretical methods.

DOI
10.61947/uw.pf.2023.74.2.13-18

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In the article a quantum estimation theory perspective on the concept of quantum measurement is presented, as well as the latest theoretical and experimental developments in the field of quantum metrology, with particular focus on the contribution of a research group from the University of Warsaw to the development of theoretical methods.
Quantum metrology holds the promise of improving the measurement precision beyond the limit of classical approaches. To achieve such enhancement in performance requires the development of quantum estimation theories as well as novel experimental techniques. In this article, we provide a brief review of some recent results in the field of quantum metrology. We emphasize that the unambiguous demonstration of the quantum-enhanced precision needs a careful analysis of the resources involved. In particular, the implementation of quantum metrology in practice requires us to take into account the experimental imperfections included, for example, particle loss and dephasing noise. For a detailed introduction to the experimental demonstrations of quantum metrology, we refer the reader to another article ‘Quantum metrology’ in the same issue.
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Quantum measurement problem is a long-standing problem at the heart of the foundations of modern physics and nascent technology, such as quantum technology. The last forty years brought a renowned interest in this problem with an emphasis on the new foundations of quantum theory and unpredicted formulation of some new quantum disciplines, such as the open quantum systems theory and the quantum information and computation science. A state of the art of the problem of measurement is shortly presented, including a brief historical view, with a review of the authors' original contributions.