| 报告题目： |
Towards the design of gravitational-wave detectors for probing neutron-star physics |
| 报告人： |
杨桓 |
| 报告人单位： |
Guelph University and Perimeter Institute for Theoretical Physics |
| 报告时间： |
2017年12月25日下午3:00 |
| 报告地点： |
引力中心3楼会议室 |
| 报告摘要： |
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The merger of binary neutron star encodes rich physics of extreme states of matter. Probing it through gravitational-wave observations requires the detectors to have high sensitivity above 1 kHz. Fortunately for current advanced detectors, there is a sizeable gap between the quantum-limited sensitivity and the classical noise at high frequencies. Here we propose a detector design that explores such a gap by pushing down the high-frequency quantum noise with an active optomechanical filter, frequency-dependent squeezing, and high optical power. The resulting noise level from 1 kHz to 4 kHz approaches the current facility limit, and is a factor of 20 to 30 below the design of existing advanced detectors at these frequencies. It will allow for precision measurements of (i) the post-merger signal of binary neutron star, with electromagnetic counterparts such as short gamma-ray burst and kilonovae, (ii) late-time inspiral, merger, and ringdown of low-mass black hole-neutron star systems, and (iii) possible detection of high frequency modes during supernovae explosions and/or magnetar giant flares. This design tries to maximize the science return of current facilities by achieving a sensitive frequency band that is complementary to proposed longer-baseline third-generation detectors: 10 km Einstein Telescope, and 40 km Cosmic Explorer. |
| 报告人简介： |
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Sept. 2017 – present: Assistant Professor at Guelph University and Associate Faculty at Perimeter Institute for Theoretical Physics;
Sept. 2016 – Sept. 2017: Postdoctoral Researcher, Princeton University;
Sept. 2013 – Sept. 2016 Postdoctoral Fellow, Perimeter Institute for Theoretical Physics;
September 2007 – September 2008 Financial Analyst QVT Financial LP
Sept. 2008 – June 2013 Ph.D., Physics California Institute of Technology
June 2004 — June 2007 B.S., Physics, California Institute of Technology
研究兴趣：Gravitational wave science, Relativistic astrophysics, Quantum optomechanics, Quantum measurement theory, Quantum and classical noise in advanced gravitational-wave detectors |
