论文标题
量子重力的随机重力波背景
Stochastic gravitational-wave background in quantum gravity
论文作者
论文摘要
在所有宇宙学量子重力或量子 - 重力启发的场景中，只有很少的预测蓝倾斜原始张量光谱。我们探索了其中的五个，并检查它们是否可以通过当前和将来的干涉仪检测到随机的引力波背景：非本地量子重力，弦 - 气体宇宙学，新的ekpyratotic场景，Brandenberger-Ho非交通膨胀膨胀和多级别的空位。我们表明，非本地量子重力是不可观察的，而其他所有模型都可以达到DECIGO的应变敏感性，而不是Ligo-Virgo-Kagra，Lisa或Einstein望远镜的应变敏感性。发现其他具有红色倾斜光谱（大多数循环量子宇宙学）的量子奖励模型或具有异常微小的量子校正（Wheeler-Dewitt量子宇宙学）是不可检测的。
Among all cosmological quantum-gravity or quantum-gravity-inspired scenarios, only very few predict a blue-tilted primordial tensor spectrum. We explore five of them and check whether they can generate a stochastic gravitational-wave background detectable by present and future interferometers: non-local quantum gravity, string-gas cosmology, new ekpyrotic scenario, Brandenberger-Ho non-commutative inflation and multi-fractional spacetimes. We show that non-local quantum gravity is unobservable, while all the other models can reach the strain sensitivity of DECIGO but not that of LIGO-Virgo-KAGRA, LISA or Einstein Telescope. Other quantum-gravity models with red-tilted spectra (most loop quantum cosmologies) or with exceptionally tiny quantum corrections (Wheeler-DeWitt quantum cosmology) are found to be non-detectable.
