344 citations · 5.5k across the 152 of their papers we have counts for
152 papers
The Lamb shift in the BTZ spacetime
Yaqian Yu, Jialin Zhang, Hongwei Yu
We study the Lamb shift of a two-level atom arising from its coupling to the conformal massless scalar field, which satisfies the Dirichlet boundary conditions, in the Hartle-Hawki…
Understanding thermal nature of de Sitter spacetime via inter-detector interaction
Wenting Zhou, Shijing Cheng, Hongwei Yu
The seminar discovery by Gibbons and Hawking that a freely falling detector observes an isotropic background of thermal radiation reveals that de Sitter space is equivalent to a th…
Primordial non-Guassianity in inflation with gravitationally enhanced friction
Li-Yang Chen, Hongwei Yu, Puxun Wu
The gravitationally enhanced friction can reduce the speed of the inflaton to realize an ultra-slow-roll inflation, which will amplify the curvature perturbations. The amplified pe…
Entanglement harvesting of accelerated detectors versus static ones in a thermal bath
Zhihong Liu, Jialin Zhang, Hongwei Yu
We make a detailed comparison between entanglement harvesting for uniformly accelerated detectors in vacuum and static ones in a thermal bath at the Unruh temperature and find that…
Growth of power spectrum due to decrease of sound speed during inflation
Rongrong Zhai, Hongwei Yu, Puxun Wu
We study the amplification of the curvature perturbations due to a small sound speed and find that its origin is different completely from that due to the ultraslow-roll inflation.…
Probing long-range properties of vacuum altered by uniformly accelerating two spatially separated Unruh-DeWitt detectors
Shijing Cheng, Wenting Zhou, Hongwei Yu
In a quantum sense, vacuum is not an empty void but full of virtual particles (fields). It may have long-range properties, be altered, and even undergo phase transitions. It is sug…