2026-02-13 九州大学
連星系からの重力波に潜む量子性のイメージ
＜関連情報＞
- https://www.kyushu-u.ac.jp/ja/researches/view/1413
- https://journals.aps.org/prl/abstract/10.1103/kv1t-j27m
連星ブラックホールからの重力波のコヒーレント状態記述 Coherent State Description of Gravitational Waves from Binary Black Holes
Sugumi Kanno, Jiro Soda, and Akira Taniguchi
Physical Review Letters Published: 12 February, 2026
DOI: https://doi.org/10.1103/kv1t-j27m
Abstract
Quantum mechanics is the fundamental framework of nature, and gravitational waves from binary black holes during the inspiral phase should likewise be analyzed quantum mechanically. It is commonly assumed that their classical description corresponds to a coherent state, so any deviation would signal genuinely quantum nature of gravity. We show that the coherent-state description reproduces classical gravitational waves at leading order, while next-order effects generate squeezed states of gravitons. For GW150914, we estimate the squeezing parameter to be ∼10−4. We find that gravitational waves from binary black holes are well described by a coherent state.
