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(Seminar) Are induced gravitational waves gauge dependent? (诱导引力波依赖于规范吗？)
- Title (Seminar) Are induced gravitational waves gauge dependent? (诱导引力波依赖于规范吗？)
- Speaker
- Date 下午5:00 @zoom
- Venue
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CAS Key Laboratory of Theoretical Physics | ||
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Institute of Theoretical Physics | ||
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Chinese Academy of Sciences | ||
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Seminar | ||
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Title 题目 |
ITP-CAS Gravity and Cosmology Seminar 1： Are induced gravitational waves gauge dependent? (诱导引力波依赖于规范吗？) | |
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Speaker 报告人 |
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Affiliation 所在单位 |
Istituto Nazionale di Fisica Nucleare Sezione di Padova | |
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Date 日期 |
17:00, Wednesday, Jan 20, 2021 | |
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Venue 地点 |
Online Zoom meeting: https://zoom.us/j/92456377730 | |
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Contact Person 所内联系人 |
Shi Pi | |
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Abstract 摘要 |
Primordial black hole formation is always accompanied by a large amount of induced gravitational waves (GWs), in principle observable by future GWs detectors. However, the theoretical expression of the induced GW spectral density is strictly speaking gauge dependent. This gauge dependence thus casts doubts on the theoretical predictions of the induced GWs. In this talk, I will investigate in detail the gauge issue of the induced GWs. I will show that, under reasonable assumptions, the induced GWs is for all practical purposes gauge independent. Thus, free of ambiguities, induced GWs are an excellent source of information about the primordial universe. | |