Dual-rail optical gradient echo memory
| Autor: | Higginbottom, Daniel B., Geng, Jiao, Campbell, Geoff T., Hosseini, Mahdi, Cao, Ming Tao, Sparkes, Ben M., Bernu, Julian, Robins, Nick P., Lam, Ping Koy, Buchler, Ben C. |
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| Rok vydání: | 2016 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1364/OE.23.024937 |
| Popis: | We introduce a scheme for the parallel storage of frequency separated signals in an optical memory and demonstrate that this dual-rail storage is a suitable memory for high fidelity frequency qubits. The two signals are stored simultaneously in the Zeeman-split Raman absorption lines of a cold atom ensemble using gradient echo memory techniques. Analysis of the split-Zeeman storage shows that the memory can be configured to preserve the relative amplitude and phase of the frequency separated signals. In an experimental demonstration dual-frequency pulses are recalled with 35% efficiency, 82% interference fringe visibility, and 6 degrees phase stability. The fidelity of the frequency-qubit memory is limited by frequency-dependent polarisation rotation and ambient magnetic field fluctuations, our analysis describes how these can be addressed in an alternative configuration. Comment: 8 pages, 4 figures |
| Databáze: | arXiv |
| Externí odkaz: |
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