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Limits on Violations of Lorentz Symmetry and the Einstein Equivalence Principle using Radio-Frequency Spectroscopy of Atomic Dysprosium

Michael HohenseePhysics Department, University of California, Berkeley 94720, USA. [email protected]N. LeeferPhysics Department, University of California, Berkeley 94720, USADmitry BudkerPhysics Department, University of California, Berkeley 94720, USAC. HarabatiPhysics Department, University of California, Berkeley 94720, USAV. A. DzubaPhysics Department, University of California, Berkeley 94720, USAV. V. FlambaumPhysics Department, University of California, Berkeley 94720, USA

2013en

ABI

Annotatsiya

We report a joint test of local Lorentz invariance and the Einstein equivalence principle for electrons, using long-term measurements of the transition frequency between two nearly degenerate states of atomic dysprosium. We present many-body calculations which demonstrate that the energy splitting of these states is particularly sensitive to violations of both special and general relativity. We limit Lorentz violation for electrons at the level of 10(-17), matching or improving the best laboratory and astrophysical limits by up to a factor of 10, and improve bounds on gravitational redshift anomalies for electrons by 2 orders of magnitude, to 10(-8). With some enhancements, our experiment may be sensitive to Lorentz violation at the level of 9 × 10(-20).

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DOI: 10.1103/physrevlett.111.050401

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