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A Fluorescence Fluctuation Spectroscopy Assay of Protein-Protein Interactions at Cell-Cell Contacts

A Fluorescence Fluctuation Spectroscopy Assay of Protein-Protein Interactions at Cell-Cell Contacts

Published on: December 1, 2018

Equivalence principle and gravitational redshift.

Michael A Hohensee¹, Steven Chu, Achim Peters

¹Department of Physics, University of California, Berkeley, California 94720, USA. hohensee@berkeley.edu

Physical Review Letters

|May 17, 2011

Summary

This summary is machine-generated.

This study explores deviations from Einstein

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Area of Science:

Fundamental physics
Gravitational physics
Experimental physics

Background:

General relativity is the cornerstone of modern gravity.
The Einstein equivalence principle (EEP) is a fundamental tenet of general relativity.
Deviations from EEP could indicate new physics beyond the Standard Model.

Purpose of the Study:

Investigate leading order deviations from general relativity.
Explore violations of the Einstein equivalence principle within the gravitational Standard Model Extension.
Establish comprehensive limits on EEP-violating terms.

Main Methods:

Analyzed redshift experiments using matter waves and clock comparisons.
Integrated data from torsion balance tests.
Incorporated results from matter-wave, microwave, optical, and Mössbauer clock tests.

Main Results:

Demonstrated the equivalence of matter-wave and clock comparison redshift experiments.
Established comprehensive limits on spin-independent EEP-violating Standard Model Extension terms.
Achieved sensitivity at the 10^-6 level for these limits.

Conclusions:

Redshift experiments provide equivalent constraints on EEP violations.
Combined experimental approaches yield robust limits on deviations from general relativity.
The study significantly advances the experimental search for new physics beyond the Standard Model.