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A framework for measuring weak values without weak interactions and its diagrammatic representation

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Title: A framework for measuring weak values without weak interactions and its diagrammatic representation
Authors: Ogawa, Kazuhisa Browse this author
Yasuhiko, Osamu Browse this author
Kobayashi, Hirokazu Browse this author
Nakanishi, Toshihiro Browse this author →KAKEN DB
Tomita, Akihisa Browse this author →KAKEN DB
Keywords: weak value
weak measurement
direct measurement of wavefunctions
Issue Date: 10-Apr-2019
Publisher: IOP Publishing
Journal Title: New Journal of Physics
Volume: 21
Start Page: 043013
Publisher DOI: 10.1088/1367-2630/ab0773
Abstract: Weak values are typically obtained experimentally by performing weak measurements, which involve weak interactions between the measured system and a probe. However, the determination of weak values does not necessarily require weak measurements, and several methods without weak system-probe interactions have been developed previously. In this work, a framework for measuring weak values is proposed to describe the relationship between various weak value measurement techniques in a unified manner. This framework, which uses a probe-controlled system transformation instead of the weak system-probe interaction, improves the understanding of the currently used weak value measurement methods. Furthermore, a diagrammatic representation of the proposed framework is introduced to intuitively identify the complex values obtained in each measurement system. By using this diagram, a new method for measuring weak values with a desired function can be systematically derived. As an example, a scan-free and more efficient direct measurement method of wavefunctions than the conventional techniques using weak measurements is developed.
Rights: http://creativecommons.org/licenses/by/3.0/
Type: article
URI: http://hdl.handle.net/2115/74166
Appears in Collections:情報科学院・情報科学研究院 (Graduate School of Information Science and Technology / Faculty of Information Science and Technology) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 小川 和久

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