标题： MHz到GHz频率范围内的引力波搜索的挑战与机遇 显示英文标题

标题： Challenges and Opportunities of Gravitational Wave Searches at MHz to GHz Frequencies

摘要： 由LIGO和Virgo合作组进行的引力波首次直接测量为探索我们的宇宙开辟了新的途径。 这份白皮书概述了在高于LIGO/Virgo频段的引力波搜索中预期面临的挑战和收获，特别关注超高频引力波（UHF-GWs），涵盖兆赫到吉赫范围。 在此频率范围内缺乏已知的天体物理源，为发现标准模型之外的物理规律提供了独特机会，这些物理规律在早期和晚期宇宙中都起作用，我们强调了一些最有希望的引力波源。 我们回顾了几种已被提出的探测器概念，以应对这一挑战，并将其预期灵敏度与各种模型预测的信号强度进行比较。 本报告是2019年10月在意大利特里斯特的ICTP举行的“高频引力波探测的挑战与机遇”研讨会的总结，该研讨会为最近启动的超高频引力波（UHF-GW）倡议奠定了基础。 显示英文摘要

摘要： The first direct measurement of gravitational waves by the LIGO and Virgo collaborations has opened up new avenues to explore our Universe. This white paper outlines the challenges and gains expected in gravitational wave searches at frequencies above the LIGO/Virgo band, with a particular focus on Ultra High-Frequency Gravitational Waves (UHF-GWs), covering the MHz to GHz range. The absence of known astrophysical sources in this frequency range provides a unique opportunity to discover physics beyond the Standard Model operating both in the early and late Universe, and we highlight some of the most promising gravitational sources. We review several detector concepts which have been proposed to take up this challenge, and compare their expected sensitivity with the signal strength predicted in various models. This report is the summary of the workshop "Challenges and opportunities of high-frequency gravitational wave detection" held at ICTP Trieste, Italy in October 2019, that set up the stage for the recently launched Ultra-High-Frequency Gravitational Wave (UHF-GW) initiative.