Reaching the quantum limit of sensitivity in electron spin resonance
| Autor: | Bienfait, A., Pla, J. J., Kubo, Y., Stern, M., Zhou, X., Lo, C. C., Weis, C. D., Schenkel, T., Thewalt, M. L. W., Vion, D., Esteve, D., Julsgaard, B., Moelmer, K., Morton, J. J. L., Bertet, P. |
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| Rok vydání: | 2015 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1038/nnano.2015.282 |
| Popis: | We report pulsed electron-spin resonance (ESR) measurements on an ensemble of Bismuth donors in Silicon cooled at 10mK in a dilution refrigerator. Using a Josephson parametric microwave amplifier combined with high-quality factor superconducting micro-resonators cooled at millikelvin temperatures, we improve the state-of-the-art sensitivity of inductive ESR detection by nearly 4 orders of magnitude. We demonstrate the detection of 1700 bismuth donor spins in silicon within a single Hahn echo with unit signal-to-noise (SNR) ratio, reduced to just 150 spins by averaging a single Carr-Purcell-Meiboom-Gill sequence. This unprecedented sensitivity reaches the limit set by quantum fluctuations of the electromagnetic field instead of thermal or technical noise, which constitutes a novel regime for magnetic resonance. Comment: Main text : 10 pages, 4 figures. Supplementary text : 16 pages, 8 figures |
| Databáze: | arXiv |
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