Quantum theory of spectral-diffusion-induced electron spin decoherence
نویسندگان
چکیده
منابع مشابه
Quantum Theory of Spin Diffusion
It has been recognized that the notion of spin diffusion due to the exchange-type interaction between spins is very useful to describe a number of experiments on the nuclear spin relaxation in a crystal containing paramagnetic impurities/l and on the critical scattering of neutrons by a ferromagnet. 2l It has been assumed there that the z-component of the magnetization density, A1°(R), would ob...
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Luca Bonci, Paolo Grigolini, Adam Laux, and Roberto Roncaglia Dipartimento di Fisica dell’Università di Pisa, Piazza Torricelli 2, 56127 Pisa, Italy Istituto di Biofisica del Consiglio Nazionale delle Ricerche, Via San Lorenzo 26, 56127 Pisa, Italy Department of Physics of the University of North Texas, P.O. Box 5368, Denton, Texas 76203 Department of Solid State Physics, Loránd Eötvös Universi...
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The dominant source of decoherence for an electron spin in a quantum dot is the hyperfine interaction with the surrounding bath of nuclear spins. The decoherence process may be slowed down by subjecting the electron spin to suitable sequences of external control pulses. We investigate the performance of a variety of dynamical decoupling protocols using exact numerical simulation. Emphasis is gi...
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Control of electron spin decoherence in contact with a mesoscopic bath of many interacting nuclear spins in an InAs quantum dot is studied by solving the coupled quantum dynamics. The nuclear spin bath, because of its bifurcated evolution predicated on the electron spin up or down state, measures the which-state information of the electron spin and hence diminishes its coherence. The many-body ...
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We present a quantum solution to the electron spin decoherence by a nuclear pair-correlation method for the electron-nuclear spin dynamics under a strong magnetic field and a temperature high for the nuclear spins but low for the electron. The theory incorporates the hyperfine interaction, the intrinsic both direct and indirect nuclear interactions, and the extrinsic nuclear coupling mediated b...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2005
ISSN: 1098-0121,1550-235X
DOI: 10.1103/physrevb.72.161306