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A Method for Measuring the Weak Value of Spin for Metastable Atoms

Flack, R; Monachello, V; Hiley, B; Barker, P; (2018) A Method for Measuring the Weak Value of Spin for Metastable Atoms. Entropy , 20 (8) , Article 566. 10.3390/e20080566. Green open access

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Abstract

A method for measuring the weak value of spin for atoms is proposed using a variant of the original Stern–Gerlach apparatus. A full simulation of an experiment for observing the real part of the weak value using the impulsive approximation has been carried out. Our predictions show a displacement of the beam of helium atoms in the metastable 2 3S1 state, ∆w, that is within the resolution of conventional microchannel plate detectors indicating that this type of experiment is feasible. Our analysis also determines the experimental parameters that will give an accurate determination of the weak value of spin. Preliminary experimental results are shown for helium, neon and argon in the 23S1 and 3P2 metastable states, respectively

Type: Article
Title: A Method for Measuring the Weak Value of Spin for Metastable Atoms
Open access status: An open access version is available from UCL Discovery
DOI: 10.3390/e20080566
Publisher version: http://doi.org/10.3390/e20080566
Language: English
Additional information: Copyright © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Keywords: weak measurement; transition probability amplitude; atomic metastable states
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: http://discovery.ucl.ac.uk/id/eprint/10056112
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