Charge decoherence in laterally coupled quantum dots due to electron-phonon interactions
arXiv:cond-mat/0503481 · doi:10.1103/PhysRevB.72.075362
Abstract
We investigate electron charge decoherence in a laterally-coupled single-electron semiconductor double quantum dot through electron-phonon interaction. We analytically and numerically evaluate the relaxation and dephasing rates due to electron coupling to both acoustic and optical phonons, and explore the system parameter space in terms of interdot distance, strength of single-dot confinement, and inter-dot coupling strength. Our numerical results show that the electron scattering rates are strongly dependent on the strength of the electron confinement and the size of the system. In addition, although the most dominant factor that determines the charge decoherence rate is the energy splitting between the charge qubit states, the details of the double dot configuration is also very important.
References updated, typos corrected, accepted to PRB
References in corpus (21)
- Spintronics: Fundamentals and applications
- Quantum Computation with Quantum Dots
- Quantum state engineering with Josephson-junction devices
- Coherent control of macroscopic quantum states in a single-Cooper-pair box
- Quantum Computing
- Quantum Computers and Dissipation
- Coherent manipulation of electronic states in a double quantum dot
- Manipulation of a single charge in a double quantum dot
- Spontaneous Emission Spectrum in Double Quantum Dot Devices
- Hilbert space structure of a solid state quantum computer: two-electron states of a double quantum dot artificial molecule
- Charge-based quantum computing using single donors in semiconductors
- Reducing decoherence in quantum computer memory with all quantum bits coupling to the same environment
- Quantum Computation with Quantum Dots and Terahertz Cavity Quantum Electrodynamics
- Decoherence Rate of Semiconductor Charge Qubit Coupled to Acoustic Phonon Reservoir
- Silicon-based Quantum Computation
- Measuring the decoherence rate in a semiconductor charge qubit
- Phonon Decoherence of a Double Quantum Dot Charge Qubit
- Magnetoconductivity of quantum wires with elastic and inelastic scattering
- Charge qubits in semiconductor quantum computer architectures: Tunnel coupling and decoherence
- Electron scattering and capture rates in quantum wells by emission of hybrid optical phonons
- Quantum gates by coupled quantum dots and measurement procedure in Si MOSFET
Cited by in corpus (38)
- Semiconductor Spintronics
- A non-Markovian decoherence theory for double dot charge qubit
- Spin properties of single electron states in coupled quantum dots
- Orbital and spin relaxation in single and coupled quantum dots
- Non-Markovian dynamics of double quantum dot charge qubits due to acoustic phonons
- Phonon-induced electron relaxation in weakly-confined single and coupled quantum dots
- Dephasing-assisted transport in linear triple quantum dots
- Intrinsic phonon decoherence and quantum gates in coupled lateral quantum dot charge qubits
- Quantum theory of the charge stability diagram of semiconductor double quantum dot systems
- Phonon-assisted relaxation and tunneling in self-assembled quantum dot molecules
- Two-spin dephasing by electron-phonon interaction in semiconductor double quantum dots
- Elastic Spin Relaxation Processes in Semiconductor Quantum Dots
- Phonon-assisted tunneling between singlet states in two-electron quantum dot molecules
- Semiconductor charge qubit relaxation due to two-phonon processes
- Phonon-assisted relaxation between hole states in quantum dot molecules
- Relaxation in quantum dots due to evanescent-wave Johnson noise from a metallic backgate
- Excitons in quantum dot molecules: Coulomb coupling, spin-orbit effects and phonon-induced line broadening
- Quantum entanglement driven by electron-vibrational mode coupling
- Effect of the Coulomb interaction on the electron relaxation of weakly-confined quantum dot systems
- Decoherence by electromagnetic fluctuations in double-quantum-dot charge qubits
- On demand entanglement in double quantum dots via coherent carrier scattering
- Improving Intrinsic Decoherence in Multi-Quantum-Dot Charge Qubits
- Significance of an external magnetic field on two-phonon processes in gated lateral semiconductor quantum dots
- Suppression of electron relaxation and dephasing rates in quantum dots caused by external magnetic fields
- Non-markovian dynamics of double quantum dot charge qubit with static bias
- Tunneling-related electron spin relaxation in self-assembled quantum-dot molecules
- Phonon-induced Majorana Qubit Relaxation in Tunnel-Coupled Two-Island Topological Superconductors
- Dephasing of electrons in the Aharonov-Bohm interferometer with a single-molecular vibrational junction
- Distinguishing coherent from incoherent charge transport in linear triple quantum dots
- Simulation of Charge Stability Diagrams for Automated Tuning Solutions (SimCATS)
- Phonon-induced decoherence of the two-level quantum subsystem due to relaxation and dephasing processes
- Noise Correlations in a 1D Silicon Spin Qubit Array
- Estimation of the spatial decoherence time in circular quantum dots
- Laser-induced operations with charge qubits in a double-well nanostructure
- Decoherence of Coupled Flip-Flop Qubits Due to Charge Noise
- Spin-orbit-induced hole spin relaxation in a quantum dot molecule: the effect of - coupling
- Non-stationary effects in the coupled quantum dots influenced by the electron-phonon interaction
- Entanglement creation in semiconductor quantum dot charge qubit