PT4 - Variation of the fundamental constants, violation of the fundamental symmetries and dark matter |
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Speaker |
Safronova, Marianna |
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| Talk Title |
Novel Atomic Clocks and the Search for New Physics |
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Abstract |
I will present a broadly applicable method to search for the violation of local Lorentz invariance with atomic systems proposed in [1]. The new scheme uses dynamic decoupling and can be implemented in current atomic clock experiments, with both single ions and arrays of neutral atoms. Moreover, the scheme can be performed on systems with no optical transitions, and therefore it is also applicable to highly charged ions which exhibit a particularly high sensitivity to Lorentz invariance violation. I will also discuss a new clock with neutral Yb proposed in [2]. The dimensionless alpha-variation enhancement factor for this transition was determined to be K = −15, larger than K for the most sensitive currently operating clock (Yb+ E3, K = −6). Interleaved interrogations of two Yb clock transitions may further reduce systematic uncertainties of clock-comparison experiments. [1] R. Shaniv, R. Ozeri, M.S. Safronova, S.G. Porsev, V.A. Dzuba, V.V. Flambaum and H. Haffner, PRL 120, 103202(2018). [2] M. S. Safronova, S. G. Porsev, Christian Sanner, and Jun Ye, Phys. Rev. Lett. 120, 173001 (2018). |
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