beat365官方网站學術論壇（第五十六講）

Bulk-acoustic-wave resonators for sensing high-frequency gravitational waves

通過體聲波諧振器探尋高頻引力波

The direct observation of gravitational waves by the LIGO and Virgo experiments marked the beginning of a new era of astrophysical investigation. Current and future interferometers, on the ground or in space, will mark a significant step forward, consolidating the knowledge of massive and supermassive GW sources emitting at low frequencies (<10 kHz). The high-frequency region is an uncertain but potentially fertile ground for searching gravitational waves from non-conventional sources, which is motivating the development of new experimental approaches (N. Aggarwal et al, 2025). In their simplest form, bulk acoustic wave (BAW) devices consist of a piezoelectric crystal between two electrodes that transduce the material's vibrations into electrical signals. They are adopted in frequency control and metrology, with well-established standards at frequencies of 5 MHz and above. The use of bulk acoustic wave (BAW) devices as a resonant-mass strain antenna for high-frequency gravitational waves has been recently proposed (Goryachev and Tobar, 2014) and explored with a pioneering experiment at the University of Western Australia. In this seminar, we describe the work to set up a second antenna at the University of Milano Bicocca and the optimization towards an array of custom devices to improve sensitivity in an unexplored region, probe multiple frequencies, and target specific sources, including emission for various dark matter candidates or post-merger emission from neutron stars.

報告人簡介：

Tommaso Tabarelli de Fatis是意大利米蘭比可卡大學實驗物理學教授，并擔任意大利國家核物理研究所（INFN）米蘭比可卡分部主任。他的科研領域涵蓋對撞機上的粒子物理研究、laboratory-scale實驗以及物理基本相互作用探測器的研發。他深度參與了歐洲核子研究中心（CERN）大型正負電子對撞機（LEP）和大型強子對撞機（LHC）相關實驗裝置的設計、運行和數據分析工作，并緻力于中微子質量與電荷共轭特性的實驗研究。在LHC的 Phase-I運行階段，他負責CMS實驗電磁量能器項目，最終成功觀測希格斯玻色子；近期牽頭主導新型時間探測器的設計與建造，為CMS實驗升級以應對LHC高亮度運行階段提供關鍵技術支撐。

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beat365官方网站學術論壇創辦于2020年9月，邀請國内外高校和研究機構高層次科技創新領軍學者就物理學及相關領域的基礎前沿探索、關鍵技術突破和熱點問題等做學術演講，旨在推進高質量學術交流，促進學科交叉融合和開拓新興特色方向研究，培養具有科學精神、全球視野、創新能力、批判性思維的優秀青年人才。

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