Charge qubit rotations in a double-dot nanostructure

Abstract

Quantum operations with a charge solid-state qubit whose logical states are formed by two spatially separated localized states of an electron in the double-dot structure are studied theoretically. We show that it is possible to perform various one-qubit rotations making use of the microwave pulses tuned to the resonances between the localized states and the excited state delocalized over the nanostructure. Explicit analytic expression for the time-dependent electron state vector is derived, and the appropriate pulse parameters are determined.

5 pages, 1 figure

References in corpus (10)

• Quantum Computation with Quantum Dots
• The Physical Implementation of Quantum Computation
• Conditional Quantum Dynamics and Logic Gates
• Quantum oscillations in two coupled charge qubits
• Charge-based quantum computing using single donors in semiconductors
• Possible realization of entanglement, logical gates and quantum information transfer with superconducting-quantum-interference-device qubits in cavity QED
• Decoherence Rate of Semiconductor Charge Qubit Coupled to Acoustic Phonon Reservoir
• Arbitrary rotation and entanglement of flux SQUID qubits
• Resonant electron transfer between quantum dots
• Josephson-phase qubit without tunneling

Cited by in corpus (7)

• Rabi oscillations in the four-level double-dot structure under the influence of the resonant pulse
• Entanglement and quantum state engineering in the optically driven two-electron double-dot structure
• Single-qubit operations in the double-donor structure driven by optical and voltage pulses
• Single-qubit operations in the double-donor structure driven by strongly detuned optical pulses
• Resonant-pulse operations on the buried donor charge qubits in semiconductors
• Resonant optical electron transfer in one-dimensional multiwell structures
• Charge qubit entanglement via conditional single-electron transfer in an array of quantum dots