Journal Article

PUBDB-2026-00862

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Demonstration of an interferometric technique for measuring vacuum magnetic birefringence with an optical cavity

Spector, A. D. (Corresponding author)DESY* ; Kozlowski, T.DESY* ; Roberts, L.Extern*

2026
Inst. Woodbury, NY

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Please use a persistent id in citations: doi:10.1103/r33m-v1kn  doi:10.3204/PUBDB-2026-00862

Report No.: arXiv:2510.14064v1

Abstract: Vacuum magnetic birefringence (VMB) is an effect predicted by quantum electrodynamics, in which the vacuum behaves as a non-linear optical medium and exhibit a birefringence in the presence of a magnetic field. In this work, an interferometric scheme is introduced to measure this effect for the first time by sensing the changes in the frequencies of fields stabilized to the resonances of an optical cavity. Results are presented from a prototype setup with this novel sensing technique implemented on a 19 m test cavity without a magnetic field. We propose using this scheme for a measurement of VMB with a 245 m long optical cavity and a string of 24 superconducting magnets, arranged for the ALPS II experiment. In this manuscript we examine potential sources of noise in the prototype, and project these results in terms of the sensitivity of the full-scale experiment.

Note: 14 pages, 13 figures

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Contributing Institute(s):

1. Any Light Particle Search (ALPS)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF4-611) (POF4-611)
2. DFG project G:(GEPRIS)390833306 - EXC 2121: Das Quantisierte Universum II (390833306) (390833306)

Experiment(s):

1. Any Light Particle Search

Appears in the scientific report 2026

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Electronics and Telecommunications Collection ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint Spector, A. D. (Corresponding author)DESY* ; Kozlowski, T.DESY* ; Roberts, L.Extern*
Demonstration of an interferometric technique for measuring vacuum magnetic birefringence with an optical cavity
[10.3204/PUBDB-2025-04259]     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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