Charge qubit dynamics in a double quantum dot coupled to phonons

Abstract

The dynamics of charge qubit in a double quantum dot coupled to phonons is investigated theoretically in terms of a perturbation treatment based on a unitary transformation. The dynamical tunneling current is obtained explicitly. The result is compared with the standard perturbation theory at Born-Markov approximation. The decoherence induced by acoustic phonons is analyzed at length. It is shown that the contribution from deformation potential coupling is comparable to that from piezoelectric coupling in small dot size and large tunneling rate case. A possible decoupling mechanism is predicted.

8 pages, 6 figures

References in corpus (13)

• Quantum Computation with Quantum Dots
• Coherent control of macroscopic quantum states in a single-Cooper-pair box
• Coherent manipulation of electronic states in a double quantum dot
• Coherent and Collective Quantum Optical Effects in Mesoscopic Systems
• Spontaneous Emission Spectrum in Double Quantum Dot Devices
• Charge-based quantum computing using single donors in semiconductors
• Spontaneous emission of phonons by coupled quantum dots
• Shot Noise Spectrum of Open Dissipative Quantum Two-level Systems
• Decoherence Rate of Semiconductor Charge Qubit Coupled to Acoustic Phonon Reservoir
• Adiabatic Transfer of Electrons in Coupled Quantum Dots
• Measuring the decoherence rate in a semiconductor charge qubit
• Magnetoconductivity of quantum wires with elastic and inelastic scattering
• Charge Transport Through Open, Driven Two-Level Systems with Dissipation

Cited by in corpus (28)

• A non-Markovian decoherence theory for double dot charge qubit
• Phonon-thermoelectric transistors and rectifiers
• Non-Markovian disentanglement dynamics of two-qubit system
• Parity meter for charge qubits: an efficient quantum entangler
• Phonon-induced electron relaxation in weakly-confined single and coupled quantum dots
• Intrinsic phonon decoherence and quantum gates in coupled lateral quantum dot charge qubits
• Phonon-assisted relaxation and tunneling in self-assembled quantum dot molecules
• Decoherence-free subspace and disentanglement dynamics for two qubits in a common non-Markovian squeezed reservoir
• Phonon-assisted tunneling between singlet states in two-electron quantum dot molecules
• Non-Markov dynamics and phonon decoherence of a double quantum dot charge qubit
• Phonon-assisted relaxation between hole states in quantum dot molecules
• Excitons in quantum dot molecules: Coulomb coupling, spin-orbit effects and phonon-induced line broadening
• Effect of the Coulomb interaction on the electron relaxation of weakly-confined quantum dot systems
• Effect of bath temperature on the quantum decoherence
• On demand entanglement in double quantum dots via coherent carrier scattering
• Decoherence by electromagnetic fluctuations in double-quantum-dot charge qubits
• Improving Intrinsic Decoherence in Multi-Quantum-Dot Charge Qubits
• Non-markovian dynamics of double quantum dot charge qubit with static bias
• Tunneling-related electron spin relaxation in self-assembled quantum-dot molecules
• Decay and persistence of spatial coherence during phonon-assisted relaxation in double quantum dots
• Non-Markovian coherence dynamics of driven spin boson model: damped quantum beat or large amplitude coherence oscillation
• Phonon-induced Majorana Qubit Relaxation in Tunnel-Coupled Two-Island Topological Superconductors
• Phonon-induced decoherence of the two-level quantum subsystem due to relaxation and dephasing processes
• Phonon effect on two coupled quantum dots at finite temperature
• Deterministic quantum state transfer from an electronic charge qubit to a photonic polarization qubit
• Study of the decoherence of a double quantum dot charge qubit via the Redfield equation
• Non-stationary effects in the coupled quantum dots influenced by the electron-phonon interaction
• Quantum Dots: Coulomb Blockade, Mesoscopic Fluctuations, and Qubit Decoherence