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Title: Numerical Modeling of the Central Spin Problem Using the Spin-Coherent-State P Representation

Abstract

In this work, we consider decoherence of a central spin by a spin bath. In order to study the nonperturbative decoherence regimes, we develop an efficient mean-field-based method for modeling the spin-bath decoherence, based on the P representation of the central spin density matrix. The method can be applied to longitudinal and transverse relaxation at different external fields. In particular, by modeling large-size quantum systems (up to 16 000 bath spins), we make controlled predictions for the slow long-time decoherence of the central spin.

Authors:
 [1];  [2];  [1];  [2]
  1. ORNL
  2. Ames Laboratory
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1003653
DOE Contract Number:
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 97; Journal Issue: 3
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; DENSITY MATRIX; RELAXATION; SIMULATION; SPIN; numerical modeling; central spin; spin coherent state p

Citation Formats

Al Hassanieh, Khaled A, Dobrovitski, V. V., Dagotto, Elbio R, and Harmon, B. N.. Numerical Modeling of the Central Spin Problem Using the Spin-Coherent-State P Representation. United States: N. p., 2006. Web. doi:10.1103/PhysRevLett.97.037204.
Al Hassanieh, Khaled A, Dobrovitski, V. V., Dagotto, Elbio R, & Harmon, B. N.. Numerical Modeling of the Central Spin Problem Using the Spin-Coherent-State P Representation. United States. doi:10.1103/PhysRevLett.97.037204.
Al Hassanieh, Khaled A, Dobrovitski, V. V., Dagotto, Elbio R, and Harmon, B. N.. Sun . "Numerical Modeling of the Central Spin Problem Using the Spin-Coherent-State P Representation". United States. doi:10.1103/PhysRevLett.97.037204.
@article{osti_1003653,
title = {Numerical Modeling of the Central Spin Problem Using the Spin-Coherent-State P Representation},
author = {Al Hassanieh, Khaled A and Dobrovitski, V. V. and Dagotto, Elbio R and Harmon, B. N.},
abstractNote = {In this work, we consider decoherence of a central spin by a spin bath. In order to study the nonperturbative decoherence regimes, we develop an efficient mean-field-based method for modeling the spin-bath decoherence, based on the P representation of the central spin density matrix. The method can be applied to longitudinal and transverse relaxation at different external fields. In particular, by modeling large-size quantum systems (up to 16 000 bath spins), we make controlled predictions for the slow long-time decoherence of the central spin.},
doi = {10.1103/PhysRevLett.97.037204},
journal = {Physical Review Letters},
number = 3,
volume = 97,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2006},
month = {Sun Jan 01 00:00:00 EST 2006}
}