161 citations · 708 across the 15 of their papers we have counts for
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cond-mat1994★ 7 cited
Four-wave mixing and terahertz emission from three-level systems in quantum wells: effects of inhomogeneous broadening
Xuejun Zhu, Mark S. Hybertsen, P. B. Littlewood +1
Using a perturbation theory based on the density-matrix formulation, we study the nonlinear optical responses of a noninteracting three-level model system to consecutive coherent p…
cond-mat1994★ 21 cited
Sliding motion of a two-dimensional Wigner crystal in a strong magnetic field
Xuejun Zhu, P. B. Littlewood, A. J. Millis
We study the sliding state of a two-dimensional Wigner crystal in a strong magnetic field and a random impurity potential. Using a high-velocity perturbation theory, we compute the…