HAIT Journal of Science and Engineering
Volume 1, Issue 3, pp. 586-597
© 2004 Holon Academic Institute of Technology


Numerical simulations of decoherence suppression in open quantum spin systems

Viatcheslav V. Dobrovitski1,*, Hans A. De Raedt2, Mikhail I. Katsnelson3, and Bruce N. Harmon1

1Ames Laboratory, Iowa State University, Ames IA 50011, USA
2Department of Applied Physics/Computational Physics, Materials Science Centre,
University of Groningen, Nijenborgh 4, NL-9747 AG Groningen, The Netherlands
3University of Nijmegen, NL-6525 ED Nijmegen, The Netherlands
*Corresponding author: slava@ameslab.gov
Received 15 October 2004, accepted 17 November 2004


Understanding decoherence in open quantum many-spin systems is important for many fields of physics, from quantum computations (QC) to the nuclear and electronic spin resonance. We use numerical simulations to study some particularly interesting situations where the destructive impact of environment can be suppressed, so that the quantum oscillations in the system fall off very slowly, demonstrating a power-law decay. Such a slow decay may be experimentally relevant for the QC architectures based on electron spins in quantum dots or nuclear spins in semiconductors.

PACS: 03.65.Yz, 02.60.Cb, 03.67.Lx, 85.35.Be


Presented for International Workshop Correlated Electrons at High Magnetic Fields. Ein-Gedi/Holon, Israel, 19-23 December 2004

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