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Institute for Pure and Applied Physical Sciences - Faculty
Lu J. Sham
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Ph.D., Theoretical Solid State Physics
Professor of Physics
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Research Areas
Condensed matter theory, many-electron physics, semiconductor nanoscience, coherent optics, quantum information and computation.
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My specialty is condensed matter theory. My current interest is in the quantum mechanics of interaction between microscopic and macroscopic systems concerning optical control of electron spins in semiconductor nanostructures, for quantum information processing and spintronics. My overall interest is in many-body theory in solids, especially the density functional theory, the electron-phonon effects and the many-body contribution to optical properties in semiconductors.
Current and past research topics include:
1. Optical control of electron spin and exciton in semiconductor nanodots for quantum information
and computation
2. Spin dynamics in semiconductor heterostructures Spintronics
3. Exciton correlation and nonlinear optical processes
4. Strongly correlated semiconductors
5. Density functional theory
For more information, visit http://sdphln.ucsd.edu/~ljssst/ljs.html
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Selected Recent Publications
C. Emary, Xiaodong Xu, D. G. Steel, S. Saikin, and L. J. Sham, "Fast Initialization of the Spin State of an Electron in a Quantum Dot in the Voigt Configuration", Phys. Rev. Lett. 98, 047401 (2007).
Wang Yao, Ren-Bao Liu, and L. J. Sham, "Restoring Coherence Lost to a Slow Interacting Mesoscopic Spin Bath", Phys. Rev. Lett. 98, 077602 (2007). PublisherŐs Note: Phys. Rev. Lett. 98, 099901 (2007).
H. Dery, P. Dalal, L. Cywinski, and L. J. Sham, "Spin-based logic in semiconductors for reconfigurable large-scale circuits", Nature 447, 573 (2007).
Xiaodong Xu, Bo Sun, Paul R. Berman, Duncan G. Steel, Allan S. Bracker, Dan Gammon, and L. J. Sham, "Coherent optical spectroscopy of a strongly driven quantum dot", Science 317, 929, (2007).
L. Cywinski and L. J. Sham, "Ultrafast demagnetization in the sp-d model: A theoretical study", Phys. Rev. B 76, 045205 (2007).
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