| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Thermometry utilizing stored short-wavelength spin waves in cold atomic ensembles |
| Xingchang Wang(王兴昌), Jianmin Wang(王建民), Ying Zuo(左瀛), Liang Dong(董亮), Georgios A Siviloglou†, and Jiefei Chen(陈洁菲)‡ |
| Shenzhen Institute for Quantum Science and Engineering and Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China |
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Abstract Temperature, as a measure of thermal motion, is a significant parameter characterizing a cold atomic ensemble optical quantum memory. In a cold gas, storage lifetime strongly depends on its temperature and is associated with the spin wave decoherence. Here we experimentally demonstrate a new spin wave thermometry method relying on this direct dependence. The short-wavelength spin waves resulting from the counter-propagating configuration of the control and the probe laser beams make this thermometry highly suitable for probing in situ the atomic motion in elongated clouds as the ones used in quantum memories. Our technique is realized with comparable precision for memories that rely on electromagnetically induced transparency as well as far-detuned Raman storage.
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Received: 05 March 2023
Revised: 27 March 2023
Accepted manuscript online: 07 April 2023
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PACS:
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42.50.Gy
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(Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)
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03.67.Hk
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(Quantum communication)
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42.50.Ex
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(Optical implementations of quantum information processing and transfer)
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07.20.Dt
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(Thermometers)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 12074171, 12074168, 92265109, and 12204227), the Key Laboratory Fund from Guangdong Province, China (Grant No. 2019B121203002), and the Natural Science Foundation of Guangdong Province, China (Grant Nos. 2022B1515020096 and 2019ZT08X324). |
Corresponding Authors:
Georgios A Siviloglou, Jiefei Chen
E-mail: siviloglouga@sustech.edu.cn;chenjf@sustech.edu.cn
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Cite this article:
Xingchang Wang(王兴昌), Jianmin Wang(王建民), Ying Zuo(左瀛), Liang Dong(董亮), Georgios A Siviloglou, and Jiefei Chen(陈洁菲) Thermometry utilizing stored short-wavelength spin waves in cold atomic ensembles 2023 Chin. Phys. B 32 074206
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