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Measurement of a false electric dipole moment signal from 199Hg atoms exposed to an inhomogeneous magnetic field

  • S. Afach
  • C. A. Baker
  • G. Ban
  • G. Bison
  • K. Bodek
  • Z. Chowdhuri
  • M. Daum
  • M. Fertl
  • B. Franke
  • P. Geltenbort
  • K. Green
  • M. G. D. van der Grinten
  • Z. Grujic
  • P. G. Harris
  • W. Heil
  • V. Hélaine
  • R. Henneck
  • M. Horras
  • P. Iaydjiev
  • S. N. Ivanov
  • M. Kasprzak
  • Y. KermaïdicEmail author
  • K. Kirch
  • P. Knowles
  • H.-C. Koch
  • S. Komposch
  • A. Kozela
  • J. Krempel
  • B. Lauss
  • T. Lefort
  • Y. Lemière
  • A. Mtchedlishvili
  • O. Naviliat-Cuncic
  • J. M. Pendlebury
  • F. M. Piegsa
  • G. Pignol
  • P. N. Prashant
  • G. Quéméner
  • D. RebreyendEmail author
  • D. Ries
  • S. Roccia
  • P. Schmidt-Wellenburg
  • N. Severijns
  • A. Weis
  • E. Wursten
  • G. Wyszynski
  • J. Zejma
  • J. Zenner
  • G. Zsigmond
Regular Article

Abstract

We report on the measurement of a Larmor frequency shift proportional to the electric-field strength for 199Hg atoms contained in a volume permeated with aligned magnetic and electric fields. This shift arises from the interplay between the inevitable magnetic field gradients and the motional magnetic field. The proportionality to electric-field strength makes it apparently similar to an electric dipole moment (EDM) signal, although unlike an EDM this effect is P- and T-conserving. We have used a neutron magnetic resonance EDM spectrometer, featuring a mercury co-magnetometer and an array of external cesium magnetometers, to measure the shift as a function of the applied magnetic field gradient. Our results are in good agreement with theoretical expectations.

Graphical abstract

Keywords

Atomic Physics 

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Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • S. Afach
    • 1
    • 2
    • 3
  • C. A. Baker
    • 4
  • G. Ban
    • 5
  • G. Bison
    • 2
  • K. Bodek
    • 6
  • Z. Chowdhuri
    • 2
  • M. Daum
    • 2
  • M. Fertl
    • 1
    • 2
  • B. Franke
    • 1
    • 2
  • P. Geltenbort
    • 7
  • K. Green
    • 4
    • 8
  • M. G. D. van der Grinten
    • 4
  • Z. Grujic
    • 9
  • P. G. Harris
    • 8
  • W. Heil
    • 10
  • V. Hélaine
    • 2
    • 5
  • R. Henneck
    • 2
  • M. Horras
    • 1
    • 2
  • P. Iaydjiev
    • 4
  • S. N. Ivanov
    • 4
  • M. Kasprzak
    • 9
  • Y. Kermaïdic
    • 11
    Email author
  • K. Kirch
    • 1
    • 2
  • P. Knowles
    • 9
  • H.-C. Koch
    • 9
    • 10
  • S. Komposch
    • 1
    • 2
  • A. Kozela
    • 12
  • J. Krempel
    • 1
  • B. Lauss
    • 2
  • T. Lefort
    • 5
  • Y. Lemière
    • 5
  • A. Mtchedlishvili
    • 2
  • O. Naviliat-Cuncic
    • 5
  • J. M. Pendlebury
    • 8
  • F. M. Piegsa
    • 1
  • G. Pignol
    • 11
  • P. N. Prashant
    • 2
    • 13
  • G. Quéméner
    • 5
  • D. Rebreyend
    • 11
    Email author
  • D. Ries
    • 2
  • S. Roccia
    • 14
  • P. Schmidt-Wellenburg
    • 2
  • N. Severijns
    • 13
  • A. Weis
    • 9
  • E. Wursten
    • 13
  • G. Wyszynski
    • 1
    • 6
  • J. Zejma
    • 6
  • J. Zenner
    • 1
    • 2
  • G. Zsigmond
    • 2
  1. 1.Institute for Particle PhysicsETH ZürichZürichSwitzerland
  2. 2.Paul Scherrer Institute (PSI)Villigen-PSISwitzerland
  3. 3.Hans Berger Department of NeurologyJena University HospitalJenaGermany
  4. 4.Rutherford Appleton LaboratoryChilton, Didcot, OxonUK
  5. 5.LPC Caen, ENSICAEN, Université de Caen Basse-Normandie, CNRS/IN2P3CaenFrance
  6. 6.Marian Smoluchowski Institute of PhysicsJagiellonian UniversityCracowPoland
  7. 7.Institut Laue-LangevinGrenobleFrance
  8. 8.Department of Physics and AstronomyUniversity of SussexFalmer, BrightonUK
  9. 9.Physics DepartmentUniversity of FribourgFribourgSwitzerland
  10. 10.Institut für PhysikJohannes-Gutenberg-UniversitätMainzGermany
  11. 11.LPSC, Université Grenoble Alpes, CNRS/IN2P3GrenobleFrance
  12. 12.Henryk Niedwodniczański Institute for Nuclear PhysicsCracowPoland
  13. 13.Instituut voor Kern - en StralingsfysicaUniversity of LeuvenLeuvenBelgium
  14. 14.CSNSM, Université Paris Sud, CNRS/IN2P3Orsay CampusFrance

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