General Relativity and Gravitation

, Volume 33, Issue 2, pp 183–194

Probing Quantum Violations of the Equivalence Principle


  • G. Z. Adunas
    • ISGBGEscuela de Fisica de la UAZ
  • E. Rodriguez-Milla
    • ISGBGEscuela de Fisica de la UAZ
  • D. V. Ahluwalia
    • ISGBGEscuela de Fisica de la UAZ

DOI: 10.1023/A:1002749217269

Cite this article as:
Adunas, G.Z., Rodriguez-Milla, E. & Ahluwalia, D.V. General Relativity and Gravitation (2001) 33: 183. doi:10.1023/A:1002749217269


The joint realm of quantum mechanics and general-relativistic description of gravitation is becoming increasingly accessible to terrestrial experiments and observations. In this essay we study the emerging indications of the violation of equivalence principle (VEP). While the solar neutrino anomaly may find its natural explanation in a VEP, the statistically significant discrepancy observed in the gravitationally induced phases of neutron interferometry seems to be the first indication of a VEP. However, such a view would seem immediately challenged by the atomic interferometry results. The latter experiments see no indications of VEP, in apparent contradiction to the neutron interferometry results. Here we show that these, and related torsion pendulum experiments, probe different aspects of gravity; and that current experimental techniques, when coupled to the solar-neutrino data, may be able to explore quantum mechanically induced violations of the equivalence principle. We predict quantum violation of the equivalence principle (qVEP) for next generation of atomic interferometry experiments. The prediction entails comparing free fall of two different linear superpositions of Cesium atomic states.

Equivalence principlequantum mechanics

Copyright information

© Plenum Publishing Corporation 2001