Elastic Spin Relaxation Processes in Semiconductor Quantum Dots

Abstract

Electron spin decoherence caused by elastic spin-phonon processes is investigated comprehensively in a zero-dimensional environment. Specifically, a theoretical treatment is developed for the processes associated with the fluctuations in the phonon potential as well as in the electron procession frequency through the spin-orbit and hyperfine interactions in the semiconductor quantum dots. The analysis identifies the conditions (magnetic field, temperature, etc.) in which the elastic spin-phonon processes can dominate over the inelastic counterparts with the electron spin-flip transitions. Particularly, the calculation results illustrate the potential significance of an elastic decoherence mechanism originating from the intervalley transitions in semiconductor quantum dots with multiple equivalent energy minima (e.g., the X valleys in SiGe). The role of lattice anharmonicity and phonon decay in spin relaxation is also examined along with that of the local effective field fluctuations caused by the stochastic electronic transitions between the orbital states. Numerical estimations are provided for typical GaAs and Si-based quantum dots.

57 pages, 14 figures

References in corpus (38)

• Spintronics: Fundamentals and applications
• Electron spin relaxation by nuclei in semiconductor quantum dots
• Electron Spin Resonance Transistors for Quantum Computing in Silicon-Germanium Heterostructures
• Electron spin decoherence in quantum dots due to interaction with nuclei
• Spin relaxation in semiconductor quantum dots
• Spin-flip transitions between Zeeman sublevels in semiconductor quantum dots
• Phonon-induced decay of the electron spin in quantum dots
• Electron Spin-Relaxation Times of Phosphorus Donors in Silicon
• Theory of electron spin decoherence by interacting nuclear spins in a quantum dot
• Spin relaxation and decoherence of holes in quantum dots
• 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
• Theory of nuclear induced spectral diffusion: Spin decoherence of phosphorus donors in Si and GaAs quantum dots
• Giant Spin Relaxation Anisotropy in Zinc-Blende Heterostructures
• Charge fluctuation induced dephasing of exchange coupled spin qubits
• Recipes for spin-based quantum computing
• Anisotropic exchange interaction of localized conduction-band electrons in semiconductor structures
• Hyperfine-mediated transitions between a Zeeman split doublet in GaAs quantum dots: The role of the internal field
• Electron spin coherence in semiconductors: Considerations for a spin-based solid state quantum computer architecture
• Analytical Solution of Electron Spin Decoherence Through Hyperfine Interaction in a Quantum Dot
• Decoherence of electron spin qubits in Si-based quantum computers
• Charge decoherence in laterally coupled quantum dots due to electron-phonon interactions
• Spin properties of single electron states in coupled quantum dots
• Exponential Gain in Quantum Computing of Quantum Chaos and Localization
• Phonon-mediated electron spin phase diffusion in a quantum dot
• Orbital and spin relaxation in single and coupled quantum dots
• Universal Leakage Elimination
• Effect of external magnetic field on electron spin dephasing induced by hyperfine interaction in quantum dots
• Non-exponential spin relaxation in magnetic field in quantum wells with random spin-orbit coupling
• Anisotropy of spin splitting and spin relaxation in lateral quantum dots
• A Stochastic Liouville Equation Approach for the Effect of Noise in Quantum Computations
• Time Scales of Phonon Induced Decoherence of Semiconductor Spin Qubits
• Quantum computing on long-lived donor states of Li in Si
• Spin relaxation in quantum dots with random spin-orbit coupling
• Spin-Lattice Relaxation in Si Quantum Dots
• Electron-nuclei spin relaxation through phonon-assisted hyperfine interaction in a quantum dot
• Spin relaxation in diluted magnetic semiconductor quantum dots
• Dynamical Imperfections in quantum computers
• Geometric origin of Eliott relation

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• Theory of Single Electron Spin Relaxation in Si/SiGe Lateral Coupled Quantum Dots
• Spin-orbit coupling and anisotropic exchange in two-electron double quantum dots
• Temperature induced spin coherence dissipation in quantum dots
• Temperature dependence of hole spin coherence in (In,Ga)As quantum dots measured by mode-locking and echo techniques
• Reexamination of spin decoherence in semiconductor quantum dots from equation-of-motion approach
• Control of electron spin and orbital resonance in quantum dots through spin-orbit interactions
• Numerical Analysis of Optimized Coherent Control Pulses
• Pulse-pumped double quantum dot with spin-orbit coupling
• Entanglement control in coupled two-mode boson systems
• Nonlinear Spin-Charge Dynamics in a Driven Double Quantum Dot
• Electron spin relaxation via flexural phonon modes in semiconducting carbon nanotubes
• Graphene spin capacitor for magnetic field sensing
• Electron and hole spin relaxation in InP-based self-assembled quantum dots emitting at telecom wavelengths
• Spin dephasing due to a random Berry phase
• Temperature dependence of electron-spin relaxation in a single InAs quantum dot at zero applied magnetic field
• Control of spin coherence in semiconductor double quantum dots
• Electron spin relaxation in carbon nanotubes
• Estimation of the spatial decoherence time in circular quantum dots
• Spin flip locking by the tunneling and relaxation in a driven double quantum dot with spin-orbit coupling
• Spin Hot Spots in Single-Electron GaAs-based Quantum Dots