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).