Two qubit conditional quantum logic operation in a single self-assembled quantum dot

Abstract

The four-level exciton/biexciton system of a single semiconductor quantum dot acts as a two qubit register. We experimentally demonstrate an exciton-biexciton Rabi rotation conditional on the initial exciton spin in a single InGaAs/GaAs dot. This forms the basis of an optically gated two-qubit controlled-rotation (CROT) quantum logic operation where an arbitrary exciton spin is selected as the target qubit using the polarization of the control laser.

4- pages, 4 figures, to be submitted to PRL

References in corpus (8)

• Conditional Quantum Dynamics and Logic Gates
• Quantum-Information Processing with Semiconductor Macroatoms
• Direct Observation of Controlled Coupling in an Individual Quantum Dot Molecule
• Exploiting exciton-exciton interactions in semiconductor quantum dots for quantum-information processing
• Fast optical preparation, control and read-out of single quantum dot spin
• Theory of fast optical spin rotation in a quantum dot based on geometric phases and trapped states
• Decoherence processes during active manipulation of excitonic qubits in semiconductor quantum dots
• Coherent control of a V-type three-level system in a single quantum dot

Cited by in corpus (24)

• Damping of Exciton Rabi Rotations by Acoustic Phonons in Optically Excited InGaAs/GaAs Quantum Dots
• Phonon induced Rabi frequency renormalization of optically driven single InGaAs/GaAs quantum dots
• Proposed robust and high-fidelity preparation of excitons and biexcitons in semiconductor quantum dots making active use of phonons
• Electrical control of inter-dot electron tunneling in a quantum dot molecule
• The role of phonons for exciton and biexciton generation in an optically driven quantum dot
• Optically induced rotation of a quantum dot exciton spin
• Observation of large spontaneous emission rate enhancement of quantum dots in a broken-symmetry slow-light waveguide
• Coherent optical writing and reading of the exciton spin state in single quantum dots
• Fast and selective phonon-assisted state preparation of a quantum dot by adiabatic undressing
• Theory of excitons in cubic III-V semiconductor GaAs, InAs and GaN quantum dots: fine structure and spin relaxation
• Fast preparation of single hole spin in InAs/GaAs quantum dot in Voigt geometry magnetic field
• Double-Pulse Generation of Indistinguishable Single Photons with Optically Controlled Polarization
• Fast high fidelity hole spin initialization in a single InGaAs quantum dot
• Effect of detuning on the phonon induced dephasing of optically driven InGaAs/GaAs quantum dots
• Direct optical state preparation of the dark exciton in a quantum dot
• Generation of entanglement in systems of intercoupled qubits
• Suppression of Decoherence tied to Electron-Phonon Coupling in Telecom-Compatible Quantum Dots: Low-threshold Reappearance Regime for Quantum State Inversion
• Dynamic vibronic coupling in InGaAs quantum dots
• Polarization dependence of phonon influences in exciton-biexciton quantum dot systems
• Dynamics and relaxation of sp biexcitons in disk-shaped quantum dots
• On-chip resonantly-driven quantum emitter with enhanced coherence
• Room Temperature Continuous-wave Excited Biexciton Emission in CsPbBr3 Nanocrystals
• Control Protocol for Dynamic Synthesis of Qubit and Qudit Gates Using Photonic Pulses and Magnetic Fields
• Quantum states interrogation using a pre-shaped free electron wavefunction