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Phys. Rev. Lett. 82, 2417 - 2421 (1999)

Dynamical Decoupling of Open Quantum Systems

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Lorenza Viola1 *, Emanuel Knill2 †, and Seth Lloyd1 ‡
1d'Arbeloff Laboratory for Information Systems and Technology, Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
2Los Alamos National Laboratory, Los Alamos, New Mexico 87545

Received 14 September 1998

We propose a novel dynamical method for beating decoherence and dissipation in open quantum systems. We demonstrate the possibility of filtering out the effects of unwanted (not necessarily known) system-environment interactions and show that the noise-suppression procedure can be combined with the capability of retaining control over the effective dynamical evolution of the open quantum system. Implications for quantum information processing are discussed.


©1999 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevLett.82.2417
DOI: 10.1103/PhysRevLett.82.2417
PACS: 03.65.-w, 03.67.-a, 05.30.-d

* Electronic address: vlorenza@mit.edu
† Electronic address: knill@lanl.gov
‡ Electronic address: slloyd@mit.edu

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