Université de Fribourg

Towards a new measurement of the neutron electric dipole moment

Ban, G. ; Bodek, K. ; Daum, M. ; Henneck, R. ; Heule, S. ; Kasprzak, M. ; Khomytov, N. ; Kirch, K. ; Knecht, A. ; Kistryn, S. ; Knowles, Paul E. ; Kuzniak, M. ; Lefort, T. ; Naviliat-Cuncic, O. ; Pichlmaier, A. ; Plonka, C. ; Quéméner, G. ; Rebetez, Martin ; Rebreyend, D. ; Rogel, G. ; Sabirov, B. M. ; Tur, M. ; Weis, Antoine ; Zejma, J.

In: Hyperfine Interactions, 2006, vol. 172, no. 1-3, p. 41-43

Precision measurements of particle electric dipole moments (EDMs) provide extremely sensitive means to search for non-standard mechanisms of T (or CP) violation. For the neutron EDM, the upper limit has been reduced by eight orders of magnitude in 50 years thereby excluding several CP violation scenarios. We report here on a new effort aiming at improving the neutron EDM limit by two orders of...

Université de Fribourg

Laser-based precision magnetometry in fundamental and applied research

Weis, Antoine ; Wynands, Robert

In: Optics and Lasers in Engineering, 2005, vol. 43, p. 387-401

In this paper we review research done by the recently founded Fribourg group for Atomic Physics (FRAP) using laser-assisted spin coherence spectroscopy of atomic samples in applied and fundamental physics. Spin coherence in optically pumped ensembles of paramagnetic atoms may be extremely long-lived when the samples are well shielded from external perturbations, like static or oscillating...