title: Hunting for dark matter with ultra-stable fibre as frequency delay system.
abstract: Many cosmological observations point towards the existence of dark-matter(DM) particles and consider them as the main component of the matter content of the universe. The goal of revealing the nature of dark-matter has triggered the development of new, extremely sensitive detectors. It has been demonstrated that the frequencies and phases of optical clock have a transient shift during the DMs' arrival due to the DM-SM(Standard Model) coupling. A simple, reliable and feasible experimental scheme is firstly proposed in this paper, based on "frequency-delay system" to search dark-matter by "self-frequency comparison" of an optical clock. During the arrival of a dark-matter, frequency discrepancy is expected between two signals with a short time difference(~ms) of the same optical clock to exhibit the interaction between atoms and dark-matter. Furthermore, this process can determine the exact position of dark-matter when it is crossing the optical clocks, therefore a network of detecting stations located in different places is recommended to reduce the misjudgment risk to an acceptable level.
authors.affiliation: School of Electronics Engineering and Computer Science, Peking University, Beijing, 100871, China.
authors.forename: Wanpeng
authors.initials: W
authors.lastname: Yang
authors.affiliation: School of Electronics Engineering and Computer Science, Peking University, Beijing, 100871, China.
authors.forename: Dawei
authors.initials: D
authors.lastname: Li
authors.affiliation: School of Electronics Engineering and Computer Science, Peking University, Beijing, 100871, China.
authors.forename: Shuangyou
authors.initials: S
authors.lastname: Zhang
authors.affiliation: School of Electronics Engineering and Computer Science, Peking University, Beijing, 100871, China.
authors.forename: Jianye
authors.initials: J
authors.lastname: Zhao