Sham Group

Research Topics

Basic issues in quantum computation and information processing (optical control, measurement, and decoherence of electron spins in semiconductor quantum dots) and semiconductor spintronics (adding spin as a new dimension of information to electronics).

Current Members

Group Picture 1
From left to right: Yong Wang, Chris Chan, Kilhyun Bang, Lu J Sham, Wen Yang, Libo Chen, taken circa April 28, 2011.

Group Picture 2
From left to right: Lu J Sham, Chris Chang, Wen Yang, Kilhyun Bang, Shengnan Ji, taken circa April 28, 2011.

Selected Recent Publications

  1. Ren-Bao Liu, Wang Yao and L.J. Sham, "Quantum computing by optical control of electron spins", Advances in Physics Vol. 59, No. 5, 703-802 (2010).
  2. Erik D. Kim, Katherine Truex, Xiaodong Xu, Bo Sun, D. G. Steel, A. S. Bracker, D. Gammon, and L. J. Sham, "Fast Spin Rotations by Optically Controlled Geometric Phases in a Charge-Tunable InAs Quantum Dot", Phys. Rev. Lett. 104, 167401 (2010).
  3. L. K. Castelano and L. J. Sham, "Proposal for efficient generation of spin-polarized current in silicon", Appl. Phys. Lett. 96, 212107 (2010).
  4. Xiaodong Xu, Wang Yao, Bo Sun, Duncan G. Steel, Allan S. Bracker, Daniel Gammon, and L. J. Sham, "Optically controlled locking of the nuclear field via coherent dark-state spectroscopy", Nature 459, 1105 (2009).
  5. R-B Liu, S-H Fung, H-K Fung, A N Korotkov and L J Sham, "Dynamics revealed by correlations of time-distributed weak measurements of a single spin", New J. Phys. 12, 013018 (2009). 8pp.
  6. S. K. Saikin, Wang Yao, and L. J. Sham, "Single-electron spin decoherence by nuclear spin bath: Linked-cluster expansion approach", Phys. Rev. B 75, 125314 (2007). 12 pages.
  7. 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).
  8. H. Dery, P. Dalal, L. Cywiński, and L. J. Sham, "Spin-based logic in semiconductors for reconfigurable large-scale circuits", Nature 447, 573 (2007).
  9. H. Dery and L. J. Sham, "Spin Extraction Theory and Its Relevance to Spintronics", Phys. Rev. Lett. 98, 046602 (2007).
  10. H. Dery, L. Cywiński, and L. J. Sham, "Spin transference and magnetoresistance amplification in a transistor", Phys. Rev. B 73, 161307 R (2006).