New techniques for a measurement of the electron's electric dipole moment
| Autor: | M. R. Tarbutt, S. C. Wright, J. A. Devlin, Jongseok Lim, Christopher Ho, Ben Sauer, I. M. Rabey, Noah Fitch, E. A. Hinds, Pauline Yzombard |
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| Přispěvatelé: | Centre for Cold Matter, Blackett Laboratory, Imperial College London, Prince Consort Road, London SW7 2AZ, (CCM), Imperial College London, European Organization for Nuclear Research (CERN), Max-Planck-Institut für Quantenoptik (MPQ), Max-Planck-Gesellschaft, Laboratoire Kastler Brossel (LKB (Jussieu)), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Science and Technology Facilities Council [2006-2012], Science and Technology Facilities Council (STFC), Alfred P. Sloan Foundation, Gordon and Betty Moore Foundation, John Templeton Foundation |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Atomic Physics (physics.atom-ph)
Fluids & Plasmas Other Fields of Physics FOS: Physical sciences General Physics and Astronomy Electron physics.atom-ph 01 natural sciences Physics - Atomic Physics 010305 fluids & plasmas Optical pumping 0103 physical sciences Limit (music) atomic and molecular physics 010306 general physics Physics [PHYS]Physics [physics] 02 Physical Sciences Series (mathematics) Chemical polarity high-precision measurement Electron electric dipole moment Computational physics electron electric dipole moment Electric dipole moment Order of magnitude |
| Zdroj: | New Journal of Physics New Journal of Physics, Institute of Physics: Open Access Journals, 2020, 22 (5), pp.053031. ⟨10.1088/1367-2630/ab83d2⟩ |
| ISSN: | 1367-2630 |
| Popis: | The electric dipole moment of the electron (eEDM) can be measured with high precision using heavy polar molecules. In this paper, we report on a series of new techniques that have improved the statistical sensitivity of the YbF eEDM experiment. We increase the number of molecules participating in the experiment by an order of magnitude using a carefully designed optical pumping scheme. We also increase the detection efficiency of these molecules by another order of magnitude using an optical cycling scheme. In addition, we show how to destabilise dark states and reduce backgrounds that otherwise limit the efficiency of these techniques. Together, these improvements allow us to demonstrate a statistical sensitivity of $1.8 \times 10^{-28}$ e cm after one day of measurement, which is 1.2 times the shot-noise limit. The techniques presented here are applicable to other high-precision measurements using molecules. 22 pages, 11 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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