报告题目:Center of Mass Momentum Dependent Interaction Between Ultracold Atoms
报 告 人:张芃,Physics department, Renmin University of China
报告时间:2017-03-16 16:00
报告地点:郑裕彤讲堂
报告摘要:We show that a new type of two-body interaction, which depends on the momentum of the center of mass (CoM) of these two particles, can be realized in ultracold atom gases with a laser-modulaed magnetic Feshbach resonance (MFR). Here the MFR is modulated by two laser beams propagating along different directions, which can induce Raman transition between two-body bound states. The Doppler effect causes the two-atom scattering length to be strongly dependent on the CoM momentum of these two atoms. As a result, the effective two-atom interaction is CoM-momentum dependent, while the one-atom free Hamiltonian is still the simple kinetic energy p2/(2m).