Marcus Lab Mesoscopic Physics

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A typical micron-scale quantum device - a quantum dot - is shown above (schematically on the left, an actual electron micrograph on the right.) Electrons are confined vertically to the ground state of a quantum well located at a GaAs/AlGaAs interface, and form a two- dimensional electron gas (2DEG). A mean free path and coherence length on the order of 10 microns insure that the carriers are coherent and ballistic. Metallic gates deposited by electron beam lithography confine electrons laterally.

A popular article on nanoscale research at Harvard is here (from Jan./Feb. 2005 issue of Harvard Magazine).

EXPERIMENTAL REVIEWS

• Hans-Andreas Engel, L. P. Kouwenhoven, Daniel Loss, C. M. Marcus,
  Controlling Spin Qubits in Quantum Dots, (2004). cond-mat/0409294.
• R. Hanson, L. P. Kouwenhoven, J. R. Petta, S. Tarucha, L. M. K. Vandersypen,
  Spins in few-electron quantum dots, (2006). cond-mat/0610433.
• L.P. Kouwenhoven, C.M. Marcus, P.L. McEuen, S. Tarucha, R.M. Westervelt, and N.S. Wingreen,
  Electron Transport in Quantum Dots, NATO ASI Conference Proceedings, ed. by L. P. Kouwenhoven, G. Schon, L.L. Sohn (Klewer, 1997). PDF
• L. P. Kouwenhoven and C. M. Marcus,
  Quantum Dots, Physics World, June 1998. PDF

THEORY REVIEWS

• Guido Burkard,
  Theory of solid state quantum information processing, (2004). cond-mat/0409626.
• Hans-Andreas Engel, L. P. Kouwenhoven, Daniel Loss, C. M. Marcus,
  Controlling Spin Qubits in Quantum Dots, (2004). cond-mat/0409294
• Y. Alhassid,
  The Statistical Theory of Quantum Dots, Rev. Mod. Phys. 72, 895-968 (2000). PDF
• I. Aleiner, P. W. Brouwer, L. I. Glazman,
  Quantum Effects in Coulomb Blockade, Physics Reports 358, 309 (2002). PDF
• G. P. Collins,
  Computing with Quantum Knots Scientific American (2006). PDF
• Sankar Das Sarma, Michael Freedman, Chetan Nayak, Steven H. Simon, Ady Stern,
  Non-Abelian Anyons and Topological Quantum Computation (2006). arXiv:0707.1889

CURRENT RESEARCH

• Spin Qubits in Lateral Quantum Dots
• Topological States and Quantum Computing in the Fractional Quantum Hall Regime
• Non-local Spin Control in Coupled Quantum Dots
• Carbon Nanotubes
• Hyperpolarized Nanoparticles for MRI
• Past Research

Acknowledgements

The Marcus Lab acknowledges funding from the ARO/IARPA, the National Science Foundation, the Defense Advanced Research Projects Agency, the Harvard NSEC, and the Microsoft Corporation.

This work is done in collaboration with the Gossard Group at the UCSB Materials Department, Loren Pfeiffer and colleagues at Lucent/Bell Labs, and the Heiblum Group at the Weizmann Institute of Science.