4 papers
Prethermal quasiconserved observables in Floquet quantum systems
Chao Yin, Pai Peng, Xiaoyang Huang +2
Prethermalization, by introducing emergent quasiconserved observables, plays a crucial role in protecting Floquet many-body phases over exponentially long time, while the ultimate…
Observation of Floquet prethermalization in dipolar spin chains
Pai Peng, Chao Yin, Xiaoyang Huang +2
Periodically driven Floquet quantum systems provide a promising platform to investigate novel physics out of equilibrium. Unfortunately, the drive generically heats up the system t…
Bell inequalities violation within non-Bunch-Davies states
Jun Feng, Xiaoyang Huang, Yao-Zhong Zhang +1
We study the quantum nature of non-Bunch-Davies states in de Sitter space by evaluating CHSH inequality on a localized two-atom system. We show that quantum nonlocality can be gene…
Quantum estimation in an expanding spacetime
Xiaoyang Huang, Jun Feng, Yao-Zhong Zhang +1
We investigate the quantum estimation on the Hubble parameter of an expanding de Sitter space by quantum metrological techniques. By exploring the dynamics of a freely falling Unru…