How to measure diffusional decoherence in multimode rubidium vapor memories?
| Autor: | Czesław Radzewicz, Radosław Chrapkiewicz, Wojciech Wasilewski |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Materials science
Quantum decoherence Atomic Physics (physics.atom-ph) FOS: Physical sciences chemistry.chemical_element 01 natural sciences Physics - Atomic Physics Rubidium 010309 optics symbols.namesake Neon Optics Xenon 0103 physical sciences Physics::Atomic and Molecular Clusters Physics::Atomic Physics Electrical and Electronic Engineering Physical and Theoretical Chemistry Diffusion (business) 010306 general physics Quantum Physics business.industry Krypton Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Atomic coherence chemistry symbols Atomic physics Quantum Physics (quant-ph) business Raman scattering Physics - Optics Optics (physics.optics) |
| Zdroj: | Optics Communications. 317:1-6 |
| ISSN: | 0030-4018 |
| DOI: | 10.1016/j.optcom.2013.12.020 |
| Popis: | Diffusion is the main limitation of storage time in spatially multimode applications of warm atomic vapors. Precise knowledge of diffusional decoherence in the system is desired for designing most of vapor memory setups. Here we present a novel, efficient and direct method of measuring unbiased diffusional decoherence, clearly distinguished from all other decoherence sources. We found the normalized diffusion coefficients of rubidium atoms in noble gases to be as follows: neon 0.20 cm$^{2}$/s, krypton 0.068 cm$^{2}$/s and we are the first to give an experimental result for rubidium in xenon: 0.057 cm$^{2}$/s. Our method consists in creating, storing and retrieving spatially-varying atomic coherence. Raman scattering provides a necessary interface to the atoms that allows for probing many spatial periodicities of atomic coherence concurrently. As opposed to previous experiments the method can be used for any single sealed glass cell and it does not require any setup alterations during the measurements and therefore it is robust and repeatable. |
| Databáze: | OpenAIRE |
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