scholarly journals Quantum theory for electron spin decoherence induced by nuclear spin dynamics in semiconductor quantum computer architectures: Spectral diffusion of localized electron spins in the nuclear solid-state environment

2006 ◽  
Vol 74 (3) ◽  
Author(s):  
W. M. Witzel ◽  
S. Das Sarma
Keyword(s):  
Quantum Theory ◽  
Solid State ◽  
Electron Spin ◽  
Nuclear Spin ◽  
Quantum Computer ◽  
Spin Dynamics ◽  
Spectral Diffusion ◽  
Computer Architectures ◽  
Electron Spins ◽  
Spin Decoherence

scholarly journals Quantum theory of spectral-diffusion-induced electron spin decoherence

2005 ◽  
Vol 72 (16) ◽  
Author(s):  
W. M. Witzel ◽  
Rogerio de Sousa ◽  
S. Das Sarma
Keyword(s):  
Quantum Theory ◽  
Electron Spin ◽  
Spectral Diffusion ◽  
Spin Decoherence

CONTROL OF ELECTRON SPIN DECOHERENCE IN MESOSCOPIC NUCLEAR SPIN BATHS

2008 ◽  
Vol 22 (01n02) ◽  
pp. 27-32
Author(s):  
REN-BAO LIU ◽  
WANG YAO ◽  
L. J. SHAM
Keyword(s):  
Electron Spin ◽  
Nuclear Spin ◽  
Spin Dynamics ◽  
Pair Correlation ◽  
Many Body ◽  
Nuclear Spins ◽  
Spin Decoherence ◽  
The Many ◽  
Mutually Independent ◽  
Correlation Approximation

The electron spin decoherence by nuclear spins in semiconductor quantum dots is caused by quantum entanglement between the electron and the nuclei. The many-body dynamics problem of the interacting nuclear spins can be solved with the pair-correlation approximation which treats the nuclear spin flip-flops as mutually independent. The nuclear spin dynamics can be controlled by simply flipping the electron spin so that the electron is disentangled from the nuclei and hence its lost coherence is restored.

scholarly journals Electron-nuclear spin dynamics in a mesoscopic solid-state quantum computer

1999 ◽  
Vol 47 (1-4) ◽  
pp. 277-279 ◽  
Author(s):  
Gennady P. Berman ◽  
David K. Campbell ◽  
Gary D. Doolen ◽  
Kirill E. Nagaev
Keyword(s):  
Solid State ◽  
Nuclear Spin ◽  
Quantum Computer ◽  
Spin Dynamics

Electron Spin Decoherence by Nuclei

2018 ◽  
Author(s):  
M. M. Glazov
Keyword(s):  
Electron Spin ◽  
Spin Dynamics ◽  
Magnetic Moments ◽  
Host Lattice ◽  
Spin Model ◽  
Relaxation Processes ◽  
Nuclear Spins ◽  
Model Calculations ◽  
Spin Decoherence ◽  
Quantum Mechanical Approach

The discussion of the electron spin decoherence and relaxation phenomena via the hyperfine interaction with host lattice spins is presented here. The spin relaxation processes processes limit the conservation time of spin states as well as the response time of the spin system to external perturbations. The central spin model, where the spin of charge carrier interacts with the bath of nuclear spins, is formulated. We also present different methods to calculate the spin dynamics within this model. Simple but physically transparent semiclassical treatment where the nuclear spins are considered as largely static classical magnetic moments is followed by more advanced quantum mechanical approach where the feedback of electron spin dynamics on the nuclei is taken into account. The chapter concludes with an overview of experimental data and its comparison with model calculations.

Dynamics of nuclear spin measurement in a mesoscopic solid-state quantum computer

2000 ◽  
Vol 12 (13) ◽  
pp. 2945-2952 ◽  
Author(s):  
Gennady P Berman ◽  
David K Campbell ◽  
Gary D Doolen ◽  
Kirill E Nagaev
Keyword(s):  
Solid State ◽  
Nuclear Spin ◽  
Quantum Computer

scholarly journals Nuclear-spin-pattern control of electron-spin dynamics in a series of V(iv) complexes

2019 ◽  
Vol 10 (36) ◽  
pp. 8447-8454 ◽  
Author(s):  
Cassidy E. Jackson ◽  
Chun-Yi Lin ◽  
Spencer H. Johnson ◽  
Johan van Tol ◽  
Joseph M. Zadrozny
Keyword(s):  
Spin Relaxation ◽  
Electron Spin ◽  
Nuclear Spin ◽  
Spin Dynamics ◽  
Relaxation Times ◽  
Open Shell ◽  
Pattern Control ◽  
Electron Spin Dynamics

This report details how the design of specific nuclear-spin patterns on ligands modulates spin-relaxation times in a set of open-shell vanadium(iv) complexes.

SILICON-BASED NUCLEAR SPIN QUANTUM COMPUTER

2005 ◽  
Vol 03 (supp01) ◽  
pp. 27-40 ◽  
Author(s):  
HSI-SHENG GOAN
Keyword(s):  
Solid State ◽  
Nuclear Spin ◽  
Quantum Computer ◽  
Theoretical Progress ◽  
Spin Quantum ◽  
Basic Physics ◽  
Qubit Operations ◽  
Silicon Based

We review the basic physics and operation principles of the silicon-based quantum computer proposed by Kane, one of the most promising solid-state quantum computer proposals. We describe in some details how single- and two-qubit operations and readout measurements can, in principle, be performed for the Kane quantum computer. In addition, we also mention briefly its recent theoretical progress and development.

Effect of electron spin dynamics on solid-state dynamic nuclear polarization performance

2014 ◽  
Vol 16 (35) ◽  
pp. 18694-18706 ◽  
Author(s):  
Ting Ann Siaw ◽  
Matthias Fehr ◽  
Alicia Lund ◽  
Allegra Latimer ◽  
Shamon A. Walker ◽  
...  
Keyword(s):  
Solid State ◽  
Electron Spin ◽  
Dynamic Nuclear Polarization ◽  
Nuclear Polarization ◽  
Spin Dynamics ◽  
Nitroxide Radicals ◽  
Flip Flop ◽  
State Dynamic ◽  
Spin Flip ◽  
Electron Spin Dynamics

Optimum integral EPR saturation, determined by electron T1e and electron spin flip-flop rate, maximizes solid-state DNP performance using nitroxide radicals.

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