Security enhanced memory for quantum state
Abstract Security enhancement is important in terms of both classical and quantum information. The recent development of a quantum storage device is noteworthy, and a coherence time of one second or longer has been demonstrated. On the other hand, although the encryption of a quantum bit or quantum...
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Nature Portfolio
2017
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oai:doaj.org-article:01652fb9cadd41ca928f68cc1fc643742021-12-02T15:05:33ZSecurity enhanced memory for quantum state10.1038/s41598-017-07121-y2045-2322https://doaj.org/article/01652fb9cadd41ca928f68cc1fc643742017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-07121-yhttps://doaj.org/toc/2045-2322Abstract Security enhancement is important in terms of both classical and quantum information. The recent development of a quantum storage device is noteworthy, and a coherence time of one second or longer has been demonstrated. On the other hand, although the encryption of a quantum bit or quantum memory has been proposed theoretically, no experiment has yet been carried out. Here we report the demonstration of a quantum memory with an encryption function that is realized by scrambling and retrieving the recorded quantum phase. We developed two independent Ramsey interferometers on an atomic ensemble trapped below a persistent supercurrent atom chip. By operating the two interferometers with random phases, the quantum phase recorded by a pulse of the first interferometer was modulated by the second interferometer pulse. The scrambled quantum phase was restored by employing another pulse of the second interferometer with a specific time delay. This technique paves way for improving the security of quantum information technology.Tetsuya MukaiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017) |
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Medicine R Science Q |
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Medicine R Science Q Tetsuya Mukai Security enhanced memory for quantum state |
| description |
Abstract Security enhancement is important in terms of both classical and quantum information. The recent development of a quantum storage device is noteworthy, and a coherence time of one second or longer has been demonstrated. On the other hand, although the encryption of a quantum bit or quantum memory has been proposed theoretically, no experiment has yet been carried out. Here we report the demonstration of a quantum memory with an encryption function that is realized by scrambling and retrieving the recorded quantum phase. We developed two independent Ramsey interferometers on an atomic ensemble trapped below a persistent supercurrent atom chip. By operating the two interferometers with random phases, the quantum phase recorded by a pulse of the first interferometer was modulated by the second interferometer pulse. The scrambled quantum phase was restored by employing another pulse of the second interferometer with a specific time delay. This technique paves way for improving the security of quantum information technology. |
| format |
article |
| author |
Tetsuya Mukai |
| author_facet |
Tetsuya Mukai |
| author_sort |
Tetsuya Mukai |
| title |
Security enhanced memory for quantum state |
| title_short |
Security enhanced memory for quantum state |
| title_full |
Security enhanced memory for quantum state |
| title_fullStr |
Security enhanced memory for quantum state |
| title_full_unstemmed |
Security enhanced memory for quantum state |
| title_sort |
security enhanced memory for quantum state |
| publisher |
Nature Portfolio |
| publishDate |
2017 |
| url |
https://doaj.org/article/01652fb9cadd41ca928f68cc1fc64374 |
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AT tetsuyamukai securityenhancedmemoryforquantumstate |
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