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Physical Review A 85 (2012) 042105
Electric dipole moment searches: reexamination of frequency shifts for particles in traps
G. Pignol1, S. Roccia2

In the context of the search for electric dipole moments, a proper theory describing frequency shifts for particles precessing in traps is needed to evaluate the systematic effects. We present here such a theory, valid in the ballistic regime and in the nonadiabatic limit. It permits the calculation of the frequency shifts for arbitrary geometry of the confinement cell as well as for arbitrary shape of the magnetic field, such as those induced by localized magnetic impurities. Our improved theory is especially relevant for experiments measuring the neutron electric dipole moment with an atomic magnetometer. Indeed, the main systematic effects of performed, on-going and future experiments can be assessed with increased confidence and precision.
1 :  LPSC - Laboratoire de Physique Subatomique et de Cosmologie
2 :  CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse
Physique/Physique Nucléaire Expérimentale
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