| Paper Abstract and Keywords |
| Presentation |
2023-12-17 17:30
[Poster Presentation]
Low-noise balanced detector with > 10 dB noise clearance at 7 GHz
Sakurako Seino, Miwa Naka, Takuya Hirano (Gakushuin Univ.) |
| Abstract |
(in Japanese) |
(See Japanese page) |
| (in English) |
Homodyne detection is widely used as a means of measuring the quadrature-phase amplitude of light, and in order to speed up continuous-variable quantum information processing, we need a broadband balanced detector which operates at the quantum noise limit. In this study, we evaluate the performance of a broadband low-noise balanced detector by measuring the quadrature-phase amplitudes of the vacuum state. The noise clearance (the increase of the quantum noise relative to the detector noise power) is 12.5dB at 7GHz, and 10dB at 8GHz, showing that a broadband low-noise homodyne detection is achieved. In addition, the linearity (the linear response of the detector noise power relative to the optical power of the local oscillator light) over broad frequency range is confirmed, allowing us to use the detector to perform a higher rate continuous-variable quantum key distribution (CV-QKD) than previous experiments. |
| Keyword |
(in Japanese) |
(See Japanese page) |
| (in English) |
Continuous-variable quantum key distribution / Homodyne detection / Balanced detector / / / / / |
| Reference Info. |
IEICE Tech. Rep. |
| Paper # |
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| Download PDF |
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| Conference Information |
| Committee |
QIT |
| Conference Date |
2023-12-17 - 2023-12-19 |
| Place (in Japanese) |
(See Japanese page) |
| Place (in English) |
OIST |
| Topics (in Japanese) |
(See Japanese page) |
| Topics (in English) |
Quantum Information |
| Paper Information |
| Registration To |
QIT |
| Conference Code |
2023-12-QIT |
| Language |
Japanese |
| Title (in Japanese) |
(See Japanese page) |
| Sub Title (in Japanese) |
(See Japanese page) |
| Title (in English) |
Low-noise balanced detector with > 10 dB noise clearance at 7 GHz |
| Sub Title (in English) |
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| Keyword(1) |
Continuous-variable quantum key distribution |
| Keyword(2) |
Homodyne detection |
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Balanced detector |
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| 1st Author's Name |
Sakurako Seino |
| 1st Author's Affiliation |
Gakushuin University (Gakushuin Univ.) |
| 2nd Author's Name |
Miwa Naka |
| 2nd Author's Affiliation |
Gakushuin University (Gakushuin Univ.) |
| 3rd Author's Name |
Takuya Hirano |
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Gakushuin University (Gakushuin Univ.) |
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| Speaker |
Author-1 |
| Date Time |
2023-12-17 17:30:00 |
| Presentation Time |
120 minutes |
| Registration for |
QIT |
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