Testing isotropy of the universe using the Ramsey resonance technique on ultracold neutron spins

I. Altarev, G. Ban, G. Bison, K. Bodek, M. Daum, M. Fertl, P. Fierlinger, B. Franke, E. Gutsmiedl, W. Heil, R. Henneck, M. Horras, N. Khomutov, K. Kirch, S. Kistryn, A. Kraft, A. Knecht, P. Knowles, A. Kozela, T. LauerB. Lauss, T. Lefort, Y. Lemière, A. Mtchedlishvili, O. Naviliat-Cuncic, A. Pazgalev, G. Petzoldt, F. M. Piegsa, E. Pierre, G. Pignol, G. Quéméner, M. Rebetez, D. Rebreyend, S. Roccia, P. Schmidt-Wellenburg, N. Severijns, Yu Sobolev, A. Weis, J. Zejma, J. Zenner, G. Zsigmond

Publikation: Beitrag in FachzeitschriftArtikelBegutachtung

3 Zitate (Scopus)

Abstract

Physics at the Planck scale could be revealed by looking for tiny violations of fundamental symmetries in low energy experiments. In 2008, a sensitive test of the isotropy of the universe has been performed with stored ultracold neutrons (UCN), this is the first clock-comparison experiment performed with free neutrons. During several days we monitored the Larmor frequency of neutron spins in a weak magnetic field using the Ramsey resonance technique. A nonzero cosmic axial field, violating rotational symmetry, would induce a daily variation of the precession frequency. Our null result constitutes one of the most stringent tests of Lorentz invariance to date.

OriginalspracheEnglisch
Seiten (von - bis)2365-2369
Seitenumfang5
FachzeitschriftPhysica B: Condensed Matter
Jahrgang406
Ausgabenummer12
DOIs
PublikationsstatusVeröffentlicht - Juni 2011
Extern publiziertJa

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