Nonadiabatic Electron Manipulation in Quantum-Dot Arrays

Abstract

A novel method of coherent manipulation of the electron tunneling in quantum-dots is proposed, which utilizes the quantum interference in nonadiabatic double-crossing of the discrete energy levels. In this method, we need only a smoothly varying gate voltage to manipulate electrons, without a sudden switching-on and off. A systematic design of a smooth gate-pulse is presented with a simple analytic formula to drive the two-level electronic state to essentially arbitrary target state, and numerical simulations for complete transfer of an electron is shown for a coupled double quantum-dots and an array of quantum-dots. Estimation of the manipulation-time shows that the present method can be employed in realistic quantum-dots.

References in corpus (9)

• Quantum Computation with Quantum Dots
• Coherent control of macroscopic quantum states in a single-Cooper-pair box
• Electron transport through double quantum dots
• Manipulating the Quantum State of an Electrical Circuit
• Coherent Quantum Dynamics of a Superconducting Flux Qubit
• Coherent manipulation of electronic states in a double quantum dot
• Landau-Zener interferometry for qubits
• Coherence control for qubits
• Nontrivial resonance of nanoscale uniaxial magnets to alternating field

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• Nonlinear Landau-Zener Processes in a Periodic Driving Field
• Entanglement creation in circuit QED via Landau-Zener sweeps
• Fault-Tolerant Landau-Zener Quantum Gates
• Landau-Zener Interference in Multilevel Superconducting Flux Qubits Driven by Large Amplitude Fields
• Landau-Zener transitions and Adiabatic impulse approximation in an array of two Rydberg atoms with time-dependent detuning
• Resonant effects in the strongly driven phase-biased Cooper-pair box
• Nonadiabatic population transfer in a tangent-pulse driven quantum model
• Landau-Zener transition of a two-level system driven by spin chains near their critical points
• Quadratic-nonlinear Landau-Zener transition for association of an atomic Bose-Einstein condensate with inter-particle elastic interactions included
• Field-induced barrier transparency of Bloch waves in tight-binding lattices
• Rate-equation approach for multi-level quantum systems
• The time-domain Landau-Zener-Stuckelberg-Majorana interference in optical lattice clock