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Conference on Lasers and Electro-Optics

Experimental quantum measurement: New techniques and new applications

Aephraim M. Steinberg

Published Jan 1, 2006• 0 citations
Publisher

Abstract

Quantum information science has reinvigorated the study of quantum measurement, and created a new sense of urgency. I present several classes of ldquomeasurementrdquo and discuss their applications, their practical feasibility, and some outstanding theoretical issues.
DOI
10.1109/cleo.2006.4628998

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While quantum measurement has long been seen as a deep philosophical conundrum, technological progress and new potential applications such as quantum information processing have turned it into a respectable experimental discipline as well. I will introduce a modern perspective on real-world quantum measurement, including the new paradigm of "weak measurement" and its (controversial) potential for addressing fundamental issues as well as for improving the precision of practical measurement.
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This paper introduces the Quantum Measurement Feedback Loop (QMFL), a novel framework fundamentally shifting the paradigm of quantum measurement. Traditionally, quantum measurement is conceived as a unidirectional process, where a system is observed by an observer. The QMFL proposes a bidirectional interaction, establishing a closed-loop feedback system. This cyclical relationship, represented mathematically as [System↔Observer], allows for active influence of the observer on the system being measured, potentially leading to significant advancements in quantum measurement techniques and exploring new avenues for quantum information processing. The core concept leverages the inherent uncertainty within quantum measurement to create a dynamic interaction, offering a pathway to mitigate measurement disturbance and improve measurement fidelity. This work outlines the theoretical framework, presents a potential experimental setup utilizing a quantum measurement platform, and discusses the potential for this approach to yield breakthroughs in measurement science, with implications for applications ranging from quantum sensing to fundamental quantum theory. ---