A High-Sensitivity Microwave-Single-Photon Detector with Rydberg Atoms at Low Temperature

@article{Haseyama2008, abstract = {Abstract\ \  A high-sensitivity microwave-single-photon detector was developed in Kyoto, in which microwave photons in a resonant cavity cooled at very low temperatures are absorbed by highly excited Rydberg atoms and the Rydberg atoms thereby promoted to a higher excited state are then selectively field-ionized and detected. This scheme allows us to count microwave photons one by one, thus provide a single-photon counting without the limit of standard quantum limit (SQL). The apparatus “CARRACK” for the single-photon detector was constructed based on this scheme, where the cavity was cooled down to 10 mK range to reduce the background of thermal blackbody photons from the cavity wall. The apparatus has served for years to search for dark matter axions in the 10 μeV (∼2.4 GHz) mass region. Thermal blackbody photons in a microwave resonant cavity at temperatures as low as 70\ mK have been measured, the sensitivity being below the SQL limit. A number of improvements in the detection efficiency and sensitivity have been planned and will be reported. Applications of the detector to fundamental physics are also discussed shortly.}, author = {Haseyama, T. and Arai, T. and Fukuda, A. and Funahashi, H. and Ikeda, S. and Imai, K. and Isozumi, Y. and Kato, T. and Kido, Y. and Matsubara, A. and Matsuki, S. and Mizusaki, T. and Nishimura, T. and Ohsawa, D. and Sawada, A. and Takahashi, Y. and Tosaki, M. and Yamamoto, K. }, citeulike-article-id = {2363702}, doi = {http://dx.doi.org/10.1007/s10909-007-9586-4}, journal = {Journal of Low Temperature Physics}, keywords = {axion, detector, photon, rydberg, single}, month = {February}, number = {3}, pages = {549--554}, posted-at = {2008-02-11 20:33:48}, priority = {2}, title = {A High-Sensitivity Microwave-Single-Photon Detector with Rydberg Atoms at Low Temperature}, url = {http://dx.doi.org/10.1007/s10909-007-9586-4}, volume = {150}, year = {2008} }

TY - JOUR ID - Haseyama2008 L3 - citeulike-article-id:2363702 TI - A High-Sensitivity Microwave-Single-Photon Detector with Rydberg Atoms at Low Temperature JF - Journal of Low Temperature Physics VL - 150 IS - 3 SP - 549 EP - 554 N2 - Abstract   A high-sensitivity microwave-single-photon detector was developed in Kyoto, in which microwave photons in a resonant cavity cooled at very low temperatures are absorbed by highly excited Rydberg atoms and the Rydberg atoms thereby promoted to a higher excited state are then selectively field-ionized and detected. This scheme allows us to count microwave photons one by one, thus provide a single-photon counting without the limit of standard quantum limit (SQL). The apparatus “CARRACK” for the single-photon detector was constructed based on this scheme, where the cavity was cooled down to 10 mK range to reduce the background of thermal blackbody photons from the cavity wall. The apparatus has served for years to search for dark matter axions in the 10 μeV (∼2.4 GHz) mass region. Thermal blackbody photons in a microwave resonant cavity at temperatures as low as 70 mK have been measured, the sensitivity being below the SQL limit. A number of improvements in the detection efficiency and sensitivity have been planned and will be reported. Applications of the detector to fundamental physics are also discussed shortly. KW - axion KW - detector KW - photon KW - rydberg KW - single AU - Haseyama, T AU - Arai, T AU - Fukuda, A AU - Funahashi, H AU - Ikeda, S AU - Imai, K AU - Isozumi, Y AU - Kato, T AU - Kido, Y AU - Matsubara, A AU - Matsuki, S AU - Mizusaki, T AU - Nishimura, T AU - Ohsawa, D AU - Sawada, A AU - Takahashi, Y AU - Tosaki, M AU - Yamamoto, K PY - 2008/02/18/ UR - http://dx.doi.org/10.1007/s10909-007-9586-4 ER -