Optimization of Quantum Noise in Space Gravitational-Wave Antenna DECIGO with Optical-Spring Quantum Locking Considering Mixture of Vacuum Fluctuations in Homodyne Detection
Quantum locking using optical spring and homodyne detection has been devised to reduce the quantum noise that limits the sensitivity of the DECIGO, a space-based gravitational-wave antenna in the frequency band around 0.1 Hz for the detection of primordial gravitational waves. The reduction in the u...
| Main Authors: | , , , , , , , , , , , , |
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| Format: | Article |
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MDPI AG
2023-11-01
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| Series: | Galaxies |
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| Online Access: | https://www.mdpi.com/2075-4434/11/6/111 |
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| author | Kenji Tsuji Tomohiro Ishikawa Kentaro Komori Koji Nagano Yutaro Enomoto Yuta Michimura Kurumi Umemura Ryuma Shimizu Bin Wu Shoki Iwaguchi Yuki Kawasaki Akira Furusawa Seiji Kawamura |
| author_facet | Kenji Tsuji Tomohiro Ishikawa Kentaro Komori Koji Nagano Yutaro Enomoto Yuta Michimura Kurumi Umemura Ryuma Shimizu Bin Wu Shoki Iwaguchi Yuki Kawasaki Akira Furusawa Seiji Kawamura |
| author_sort | Kenji Tsuji |
| collection | DOAJ |
| description | Quantum locking using optical spring and homodyne detection has been devised to reduce the quantum noise that limits the sensitivity of the DECIGO, a space-based gravitational-wave antenna in the frequency band around 0.1 Hz for the detection of primordial gravitational waves. The reduction in the upper limit of energy density <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi mathvariant="sans-serif">Ω</mi><mi>GW</mi></msub></semantics></math></inline-formula> from <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>2</mn><mrow><mspace width="3.33333pt"></mspace><mo>×</mo><mspace width="3.33333pt"></mspace></mrow><msup><mn>10</mn><mrow><mo>−</mo><mn>15</mn></mrow></msup></mrow></semantics></math></inline-formula> to <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>1</mn><mrow><mspace width="3.33333pt"></mspace><mo>×</mo><mspace width="3.33333pt"></mspace></mrow><msup><mn>10</mn><mrow><mo>−</mo><mn>16</mn></mrow></msup></mrow></semantics></math></inline-formula>, as inferred from recent observations, necessitates improved sensitivity in the DECIGO to meet its primary science goals. To accurately evaluate the effectiveness of this method, this paper considers a detection mechanism that takes into account the influence of vacuum fluctuations on homodyne detection. In addition, an advanced signal processing method is devised to efficiently utilize signals from each photodetector, and design parameters for this configuration are optimized for the quantum noise. Our results show that this method is effective in reducing quantum noise, despite the detrimental impact of vacuum fluctuations on its sensitivity. |
| first_indexed | 2024-03-08T20:44:33Z |
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| id | doaj.art-302f65cfc3d3425f9424bf8a8d6c0786 |
| institution | Directory Open Access Journal |
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| language | English |
| last_indexed | 2024-03-08T20:44:33Z |
| publishDate | 2023-11-01 |
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| series | Galaxies |
| spelling | doaj.art-302f65cfc3d3425f9424bf8a8d6c07862023-12-22T14:10:22ZengMDPI AGGalaxies2075-44342023-11-0111611110.3390/galaxies11060111Optimization of Quantum Noise in Space Gravitational-Wave Antenna DECIGO with Optical-Spring Quantum Locking Considering Mixture of Vacuum Fluctuations in Homodyne DetectionKenji Tsuji0Tomohiro Ishikawa1Kentaro Komori2Koji Nagano3Yutaro Enomoto4Yuta Michimura5Kurumi Umemura6Ryuma Shimizu7Bin Wu8Shoki Iwaguchi9Yuki Kawasaki10Akira Furusawa11Seiji Kawamura12Department of Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Aichi, JapanDepartment of Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Aichi, JapanResearch Center for the Early Universe (RESCEU), School of Science, University of Tokyo, Tokyo 113-0033, Tokyo, JapanLQUOM, Inc., Tokiwadai, Hodogaya, Yokohama 240-8501, Kanagawa, JapanDepartment of Applied Physics, School of Engineering, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-8656, Tokyo, JapanResearch Center for the Early Universe (RESCEU), School of Science, University of Tokyo, Tokyo 113-0033, Tokyo, JapanDepartment of Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Aichi, JapanDepartment of Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Aichi, JapanDepartment of Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Aichi, JapanDepartment of Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Aichi, JapanDepartment of Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Aichi, JapanDepartment of Applied Physics, School of Engineering, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-8656, Tokyo, JapanDepartment of Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Aichi, JapanQuantum locking using optical spring and homodyne detection has been devised to reduce the quantum noise that limits the sensitivity of the DECIGO, a space-based gravitational-wave antenna in the frequency band around 0.1 Hz for the detection of primordial gravitational waves. The reduction in the upper limit of energy density <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi mathvariant="sans-serif">Ω</mi><mi>GW</mi></msub></semantics></math></inline-formula> from <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>2</mn><mrow><mspace width="3.33333pt"></mspace><mo>×</mo><mspace width="3.33333pt"></mspace></mrow><msup><mn>10</mn><mrow><mo>−</mo><mn>15</mn></mrow></msup></mrow></semantics></math></inline-formula> to <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>1</mn><mrow><mspace width="3.33333pt"></mspace><mo>×</mo><mspace width="3.33333pt"></mspace></mrow><msup><mn>10</mn><mrow><mo>−</mo><mn>16</mn></mrow></msup></mrow></semantics></math></inline-formula>, as inferred from recent observations, necessitates improved sensitivity in the DECIGO to meet its primary science goals. To accurately evaluate the effectiveness of this method, this paper considers a detection mechanism that takes into account the influence of vacuum fluctuations on homodyne detection. In addition, an advanced signal processing method is devised to efficiently utilize signals from each photodetector, and design parameters for this configuration are optimized for the quantum noise. Our results show that this method is effective in reducing quantum noise, despite the detrimental impact of vacuum fluctuations on its sensitivity.https://www.mdpi.com/2075-4434/11/6/111quantum noiseprimordial gravitational wavesquantum lockingoptical springDECIGO |
| spellingShingle | Kenji Tsuji Tomohiro Ishikawa Kentaro Komori Koji Nagano Yutaro Enomoto Yuta Michimura Kurumi Umemura Ryuma Shimizu Bin Wu Shoki Iwaguchi Yuki Kawasaki Akira Furusawa Seiji Kawamura Optimization of Quantum Noise in Space Gravitational-Wave Antenna DECIGO with Optical-Spring Quantum Locking Considering Mixture of Vacuum Fluctuations in Homodyne Detection Galaxies quantum noise primordial gravitational waves quantum locking optical spring DECIGO |
| title | Optimization of Quantum Noise in Space Gravitational-Wave Antenna DECIGO with Optical-Spring Quantum Locking Considering Mixture of Vacuum Fluctuations in Homodyne Detection |
| title_full | Optimization of Quantum Noise in Space Gravitational-Wave Antenna DECIGO with Optical-Spring Quantum Locking Considering Mixture of Vacuum Fluctuations in Homodyne Detection |
| title_fullStr | Optimization of Quantum Noise in Space Gravitational-Wave Antenna DECIGO with Optical-Spring Quantum Locking Considering Mixture of Vacuum Fluctuations in Homodyne Detection |
| title_full_unstemmed | Optimization of Quantum Noise in Space Gravitational-Wave Antenna DECIGO with Optical-Spring Quantum Locking Considering Mixture of Vacuum Fluctuations in Homodyne Detection |
| title_short | Optimization of Quantum Noise in Space Gravitational-Wave Antenna DECIGO with Optical-Spring Quantum Locking Considering Mixture of Vacuum Fluctuations in Homodyne Detection |
| title_sort | optimization of quantum noise in space gravitational wave antenna decigo with optical spring quantum locking considering mixture of vacuum fluctuations in homodyne detection |
| topic | quantum noise primordial gravitational waves quantum locking optical spring DECIGO |
| url | https://www.mdpi.com/2075-4434/11/6/111 |
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