Test of the Equivalence Principle for Superconductors

Test of the Equivalence Principle for Superconductors

We searched for violations of the weak equivalence principle using a cryogenic torsion balance with a pendulum comprised of superconducting niobium and copper. We constrain the E\"otv\"os parameter with 95%-confidence to $\eta_{\text{Nb*-Cu}}~\leq~2.0\times10^{-9}$ and $\eta_{\text{CP-ee}}...

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Bibliographic Details
Main Authors: Ross, M. P, Fleischer, S. M, Paulson, I. A, Lamb, P, Iritani, B. M, Adelberger, E. G, Hagedorn, C. A, Venkateswara, K, Gettings, C, Shaw, E. A, Apple, S. K, Gundlach, J. H
Format: Journal Article
Language:English
Published: 30-07-2024
Subjects:
Physics - General Relativity and Quantum Cosmology
Physics - Superconductivity
Online Access:Get full text
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Summary:We searched for violations of the weak equivalence principle using a cryogenic torsion balance with a pendulum comprised of superconducting niobium and copper. We constrain the E\"otv\"os parameter with 95%-confidence to $\eta_{\text{Nb*-Cu}}~\leq~2.0\times10^{-9}$ and $\eta_{\text{CP-ee}}\leq9.2\times10^{-4}$ for superconducting niobium and Cooper pairs, respectively.
DOI:10.48550/arxiv.2407.21232