Yichi Zhang

Prof. Yichi Zhang

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Biography

I research electron many-body dynamics and symmetry control using ultrafast pulse lasers. Symmetry breaking and symmetry restoration in symmetric atomic and molecular many-body systems provide sufficient tools to initiate and stop charge migration. The concept of symmetry restoration presents a new challenge in coherent control. Controlling electronic symmetry can be applied in chemical reactions and charge migration. I study the symmetry restoration of an electron wave packet by using two circularly polarized laser pulses. Symmetry restoration is demonstrated by tuning the inter-pulse delay on the attosecond timescale to achieve high-contrast time-dependent Ramsey interferometry. I study the exotic many-body electronic phenomena dominated by the Coulomb interaction.

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