Optically-detected spin-echo method for relaxation times measurements in a Rb atomic vapor
Mohammadreza Gharavipour, Christoph Affolderbach, Florian Gruet, Gaetano Mileti, Branislav Jelenkovic, I.S Radojicic & A. Krmpot
| Résumé |
Weintroduce and demonstrate an experimental method,
optically-detected spin-echo (ODSE), to measure ground-state relaxation times of a rubidium (Rb) atomic vapor held in a glass cell with buffergas. The work is motivated by our studies on high-performance Rb atomic clocks, where both population and coherence relaxation times (T1 and T2, respectively) of the ‘clock transition’ (52S1/2 ∣Fg = 1, mF = 0ñ « ∣Fg = 2, mF = 0ñ) are relevant.OurODSEmethod is inspired by classical nuclear magnetic resonance spin-echo method, combined with optical detection. In contrast to other existing methods, like continuous-wave double-resonance (CW-DR) and Ramsey-DR, principles of the ODSE method allow suppression of decoherence arising from the inhomogeneity of the static magnetic field across the vapor cell, thus enabling measurements of intrinsic relaxation rates, as properties of the cell alone. Our experimental result for the coherence relaxation time, specific for the clock transition, measured with the ODSE method is in good agreement with the theoretical prediction, and the ODSE results are validated by comparison to those obtained with Franzen,CWDRand Ramsey-DR methods. The method is of interest for a wide variety of quantum optics experiments with optical signal readout. |
| Mots-clés |
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| Citation | M. Gharavipour, et al., "Optically-detected spin-echo method for relaxation times measurements in a Rb atomic vapor," New Journal of Physics, vol. 19, p. 1-2, June 2017. |
| Type | Article de périodique (Anglais) |
| Date de publication | 26-6-2017 |
| Nom du périodique | New Journal of Physics |
| Volume | 19 |
| Numéro | art. no 063027 |
| Pages | 1-2 |
| URL | https://doi.org/10.1088/1367-2630/aa73c2 |