An even simpler understanding of quantum weak values
نویسندگان
چکیده
منابع مشابه
Simple understanding of quantum weak values
In this work we revisit the important and controversial concept of quantum weak values, aiming to provide a simplified understanding to its associated physics and the origin of anomaly. Taking the Stern-Gerlach setup as a working system, we base our analysis on an exact treatment in terms of quantum Bayesian approach. We also make particular connection with a very recent work, where the anomaly...
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Since its introduction 25 years ago, the quantum weak value has gradually transitioned from a theoretical curiosity to a practical laboratory tool. While its utility is apparent in the recent explosion of weak value experiments, its interpretation has historically been a subject of confusion. Here a pragmatic introduction to the weak value in terms of measurable quantities is presented, along w...
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Yakir Aharonov 2, 3 and Alonso Botero 4, ∗ 1 Department of Physics and Astronomy, University of South Carolina, Columbia, SC 29208 Department of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel Department of Physics and Astronomy, George Mason University, Fairfax, VA 22030 4 Departamento de F́ısica, Universidad de Los Andes, Apartado Aéreo 4976, Bogotá, Colombia (Dated: August ...
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The concept of a modular value of an observable of a pre- and postselected quantum system is introduced. It is similar in form and in some cases has a close connection to the weak value of an observable, but instead of describing an effective interaction when the coupling is weak, it describes a coupling of any strength but only to qubit meters. The generalization of the concept for a coupling ...
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In the weak measurement formalism of Y. Aharonov et al. the so-called weak value Aw of any observable A is generally a complex number. We derive a physical interpretation of its value in terms of the shift in the measurement pointer’s mean position and mean momentum. In particular we show that the mean position shift contains a term jointly proportional to the imaginary part of the weak value a...
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ژورنال
عنوان ژورنال: Annals of Physics
سال: 2018
ISSN: 0003-4916
DOI: 10.1016/j.aop.2017.11.030