Estimation of the spatial decoherence time in circular quantum dots
arXiv:1005.0460 · doi:10.1103/PhysRevB.79.245310
Abstract
We propose a simple phenomenological model to estimate the spatial decoherence time in quantum dots. The dissipative phase space dynamics is described in terms of the density matrix and the corresponding Wigner function, which are derived from a master equation with Lindblad operators linear in the canonical variables. The formalism was initially developed to describe diffusion and dissipation in deep inelastic heavy ion collisions, but also an application to quantum dots is possible. It allows us to study the dependence of the decoherence rate on the dissipation strength, the temperature and an external magnetic field, which is demonstrated in illustrative calculations on a circular GaAs one-electron quantum dot.
References in corpus (18)
- Theory of electron spin decoherence by interacting nuclear spins in a quantum dot
- Exact Master Equation and Quantum Decoherence of Two Coupled Harmonic Oscillators in a General Environment
- Hyperfine interaction induced decoherence of electron spins in quantum dots
- Phonon Decoherence of a Double Quantum Dot Charge Qubit
- Non-Markovian dynamics of double quantum dot charge qubits due to acoustic phonons
- Long-time electron spin storage via dynamical suppression of hyperfine-induced decoherence in a quantum dot
- Phonon-induced electron relaxation in weakly-confined single and coupled quantum dots
- Purity and decoherence in the theory of a damped harmonic oscillator
- Quantum decoherence and classical correlations of the harmonic oscillator in the Lindblad theory
- Elastic Spin Relaxation Processes in Semiconductor Quantum Dots
- Temperature induced spin coherence dissipation in quantum dots
- Reexamination of spin decoherence in semiconductor quantum dots from equation-of-motion approach
- Decoherence of coupled electron spins via nuclear spin dynamics in quantum dots
- Spin Decoherence from Hamiltonian dynamics in Quantum Dots
- Many-Body perturbation theory calculations on circular quantum dots
- Dissipative tunneling through a parabolic potential in the Lindblad theory of open quantum systems
- Uncertainty functions of the open quantum harmonic oscillator in the Lindblad theory
- Controlled Operations in a Strongly Correlated Two-Electron Quantum Ring