Dynamical decoupling techniques for coherent quantum control: Recent developments

Speaker: Lorenza Viola, Darmouth College

When: November 17, 2006 (Fri), 12:00PM to 02:00PM (add to my calendar)
Location: SCI 352
Hosted by: Raj Mohanty

This event is part of the Biophysics/Condensed Matter Seminar Series.

Abstract: The design of schemes for coherently manipulating quantum dynamics is central to quantum control theory as well as to a variety of applications in quantum information science, including decoherence suppression strategies and quantum simulation protocols. After reviewing the basic principles underlying dynamical decoupling techniques, I will illustrate how the latter provide a useful control-theoretic framework for the manipulation of both closed- and open-system evolutions, and highlight current developments in the field. In particular, I will compare recently developed randomized decoupling methods [1,2] with conventional deterministic schemes, and discuss the application of dynamical decoupling to controlling electron spin coherence in quantum dots [3].

[1] L. Viola and E. Knill, Phys. Rev. Lett. 94, 060502 (2005).
[2] L.F. Santos and L. Viola, Phys. Rev. Lett. 97, 150501 (2006).
[3] W. Zhang, V.V. Dobrovitski, L.F. Santos, L. Viola, and B.N. Harmon, Phys. Rev. Lett., submitted.