Dynamical decoupling techniques for coherent quantum control: Recent developments
When: November 17, 2006 (Fri), 12:00PM to 02:00PM
Hosted by:
Raj Mohanty
Speaker: Lorenza Viola, Darmouth College
This event is part of the Condensed Matter Seminar Series. All seminars will take place in the Metcalf Science Center, Room 352 at noon, unless otherwise noted
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.