Suppression of spin-exchange relaxation in tilted magnetic fields within the geophysical range
- Scholtes, Theo Leibniz Institute of Photonic Technology, Jena, Germany - Department of Physics, University of Fribourg, Switzerland
- Pustelny, Szymon Marian Smoluchowski Institute of Physics, Jagiellonian University, Cracow, Poland
- Fritzsche, Stephan Helmholtz-Institut Jena, Jena, Germany - Theoretisch-Physikalisches Institut, Friedrich-Schiller-Universität Jena, Germany
- Schultze, Volkmar Leibniz Institute of Photonic Technology, Jena, Germany
- Stolz, Ronny Leibniz Institute of Photonic Technology, Jena, Germany
- Meyer, Hans-Georg Leibniz Institute of Photonic Technology, Jena, Germany
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05.07.2016
Published in:
- Physical Review A. - 2016, vol. 94, no. 1, p. 13403
English
We present a detailed experimental and theoretical study on the relaxation of spin coherence due to the spin-exchange mechanism arising in the electronic ground states of alkali-metal vapor atoms. As opposed to the well-explored formation of a stretched state in a longitudinal geometry (magnetic field parallel to the laser propagation direction) we employ adapted hyperfine-selective optical pumping in order to suppress spin-exchange relaxation. By comparing measurements of the intrinsic relaxation rate of the spin coherence in the ground state of cesium atoms with detailed density-matrix simulations we show that the relaxation due to spin-exchange collisions can be reduced substantially even in a tilted magnetic field of geomagnetic strength, the major application case of scalar magnetic surveying. This explains the observed striking improvement in sensitivity and further deepens the understanding of the light- narrowed Mx magnetometer, which was presented recently. Additionally, new avenues for investigating the dynamics in alkali-metal atoms governed by the spin-exchange interaction and interacting with arbitrary external fields open up.
- Faculty
- Faculté des sciences et de médecine
- Department
- Département de Physique
- Language
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- English
- Classification
- Physics
- License
- License undefined
- Identifiers
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- RERO DOC 277429
- DOI 10.1103/PhysRevA.94.013403
- Persistent URL
- https://folia.unifr.ch/unifr/documents/305126
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