A quantum many body model for the embedded electron spin decoherence in organic solids

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.

Download Full-text

Quantum many-body theory for electron spin decoherence in nanoscale nuclear spin baths

Reports on Progress in Physics ◽

10.1088/0034-4885/80/1/016001 ◽

2016 ◽

Vol 80 (1) ◽

pp. 016001 ◽

Cited By ~ 46

Author(s):

Wen Yang ◽

Wen-Long Ma ◽

Ren-Bao Liu

Keyword(s):

Electron Spin ◽

Nuclear Spin ◽

Many Body ◽

Many Body Theory ◽

Spin Decoherence ◽

Body Theory

Download Full-text

Electron Spin Decoherence Times in Si-Based Structures

10.21236/ada441004 ◽

2005 ◽

Author(s):

Stephen A. Lyon

Keyword(s):

Electron Spin ◽

Spin Decoherence

Download Full-text

Electron Spin Decoherence by Nuclei

10.1093/oso/9780198807308.003.0007 ◽

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.

Download Full-text