A millisecond quantum memory for scalable quantum networks
By Bo Zhao, Yu-Ao Chen, Xiao-Hui Bao, Thorsten Strassel, C. Chuu, Xian-min Jin, Jörg Schmiedmayer, Zhen-Sheng Yuan, Shuai Chen, Jian-Wei Pan. 2008
209 citations recorded by the source corpus.
calculation shows that the expected lifetime is of the order of seconds in this case. Here we report on our investigation of prolonging the storage time of the quantum memory for single excitations. In the experiment, we find that using only the ‘clock state’ is not sufficient toobtain theexpected longstorage time.We furtheranalyse, isolate and identify the distinct decoherence mechanisms, and thoroughly investigate the dephasing of the spin wave (SW) by varying its wavelength. We find that the dephasing of the SW is extremely sensitive to the angle between the write beam and detection mode, especiallyforsmallangles.Onthebasisofthisfinding,byexploiting the ‘clock state’ and increasing the wavelength of the SW to suppress the dephasing, we succeed in extending the storage time from 10s
Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics
View Paper: https://www.semanticscholar.org/paper/7be712c37fb806b4b1a3e8864a9b903fc414c678
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In Artificial Intelligence
- C. Simon
- Nicolas Sangouard
- Hugues de Riedmatten
- Nicolas Gisin
- Alexander I. Lvovsky
- Klemens Hammerer
- Anders Søndberg Sørensen
- Wolfgang Tittel
In Atomic and Molecular Physics, and Optics
- C. Simon
- Nicolas Sangouard
- Nicolas Gisin
- Wolfgang Tittel
- Hugues de Riedmatten
- Alexander I. Lvovsky
- Klemens Hammerer
- Anders Søndberg Sørensen
Citations in the corpus
- Quantum interface between light and atomic ensembles (2008, methodology): “For a typical MOT temperature of 100 µK this time is around hundreds of microseconds, as was demonstrated by Zhao et al. (2009a).”
- Quantum repeaters based on atomic ensembles and linear optics (2009, methodology): “(Zhao et al., 2009a).”
- Micius quantum experiments in space (2022, background): “As a milestone, the approach of utilizing cold atomic ensembles afforded an efficient quantum memory with a subsecond lifetime in 2016, with the two parameters fulfilling the requirement of long-distance quantum repeaters for the first time (Zhao et al., 2009; Bao et al., 2012; Yang et al., 2016).”
- Optical quantum memory (2009, methodology): “[145] instead used a collinear geometry for the four optical fields involved, in which case the dephasing due to atomic motion is greatly reduced.”