Title：Hunting for dark matter with GPS and atomic clock networks
主讲人：Dr. Andrei Derevianko
时间：2016年3月25日（本周五）上午10:00
地点：物理学院新楼五楼多功能厅
Abstract：Atomic clocks are arguably the most accurate scientific instruments ever built. Modern clocks are astonishing timepieces guaranteed to keep time within a second over the age of the Universe. Attaining this accuracy requires that the quantum oscillator be well protected from environmental noise and perturbations well controlled and characterized. This opens intriguing prospects of using clocks to study subtle effects, and it is natural to ask if such accuracy can be harnessed for dark matter searches. We point out that a transient in time change of fundamental constants can be induced by dark matter objects that have large spatial extent. We argue that correlated networks of atomic clocks, such as atomic clocks onboard satellites of the GPS constellation, can be used as a powerful tool to search for the topological defect dark matter. We envision using GPS as a 50,000 km-aperture dark-matter detector.
Dr. Andrei Derevianko is a McMinn Professor of Physics at the University of Nevada, Reno, USA. He has authored 122 refereed publications in theoretical physics, including 22 Physical Review Letters and a publication in Nature Physics and Reviews of Modern Physics. He has presented over 100 invited talks. He is a fellow of the American Physical Society, Simons fellow in theoretical physics, and a Fulbright scholar. Among a variety of research topics, he has contributed to the development of several novel classes of atomic clocks and precision tests of fundamental symmetries with atoms and molecules. As a part of the GPS.DM observatory collaboration, he is currently involved with a dark matter search using atomic clocks on-board navigational satellites.
Short bio: Dr. Andrei Derevianko is a McMinn Professor of Physics at the University of Nevada, Reno, USA. He has authored 122 refereed publications in theoretical physics, including 22 Physical Review Letters and a publication in Nature Physics and Reviews of Modern Physics. He has presented over 100 invited talks. He is a fellow of the American Physical Society, Simons fellow in theoretical physics, and a Fulbright scholar. Among a variety of research topics, he has contributed to the development of several novel classes of atomic clocks and precision tests of fundamental symmetries with atoms and molecules. As a part of the GPS.DM observatory collaboration, he is currently involved with a dark matter search using atomic clocks on-board navigational satellites.
