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Navigation by Spins

Date: 2021-04-15
Time: 14:00
Venue: M253
Speaker: 赵楠




In this talk, I will discuss our recent works on navigation using spins. The talk consists of two parts. In Part 1, following a brief introduction of the importance of navigation and the general principles of navigation using spins, I will present one of our theoretical works on biocompass. People believe that some migrating birds employ the geomagnetic field to orientate and navigate. However, the underlying microscopic mechanisms are still under debate. I will discuss our theoretical work on the “biocompass” system, which allows birds to “see” the earth magnetic fields.  In Part 2, I will introduce our experimental progress on atomic gyroscope. We use the electron spins of alkali metal atoms (e.g., Rb atoms) and nuclear spins of noble gas atoms (e.g., Xe atoms) to implement nuclear magnetic resonance gyroscope. This part will focus on the microscopic mechanism of spin-exchange pumping process between Rb and Xe atoms and its applications in spin-based gyroscope.