ORIGINAL RESEARCH article
Front. Quantum Sci. Technol.
Sec. Basic Science for Quantum Technologies
Volume 4 - 2025 | doi: 10.3389/frqst.2025.1603372
This article is part of the Research Topic100 Years of Quantum Science and TechnologyView all 6 articles
Dynamics of ideal quantum measurement of a spin 1
Provisionally accepted
- University of Amsterdam, Amsterdam, Netherlands
Select one of your emails
You have multiple emails registered with Frontiers:
Notify me on publication
Please enter your email address:
If you already have an account, please login
You don't have a Frontiers account ? You can register here
Quantum measurement is a dynamical process of an apparatus coupled to a test system. Ideal measurement of the z-component of a spin-1 2 (s z = ± 1 2 ) has been modeled by the Curie-Weiss model for quantum measurement. Recently, the model was generalized to higher spin and the thermodynamics was solved. Here the dynamics is considered. To this aim, the dynamics for spin-1 2 case is cast in general notation. The dynamics of the measurement of the z-component of a spin-1 (s z = 0, ±1) is solved in detail and evaluated numerically. Energy costs of the measurement, which are macroscopic, are evaluated. Generalization to higher spin is straightforward.
Keywords: ideal quantum measurement, dynamics, Curie-Weiss model, higher spin, Exact solution
Received: 31 Mar 2025; Accepted: 16 May 2025.
Copyright: © 2025 Nieuwenhuizen. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Theodorus Maria Nieuwenhuizen, University of Amsterdam, Amsterdam, Netherlands
Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.