214 citations · 348 across the 5 of their papers we have counts for
5 papers
Enhanced photocurrent readout for a quantum dot qubit by bias modulation
J. H. Quilter, R. J. Coles, A. J. Ramsay +2
We demonstrate coherent control of a quantum dot exciton using photocurrent detection with a sinusoidal reverse bias. Optical control is performed at low bias, where tunneling-limi…
Fast preparation of single hole spin in InAs/GaAs quantum dot in Voigt geometry magnetic field
T. M. Godden, J. H. Quilter, A. J. Ramsay +6
The preparation of a coherent heavy-hole spin via ionization of a spin-polarized electron-hole pair in an InAs/GaAs quantum dot in a Voigt geometry magnetic field is investigated.…
Fast high fidelity hole spin initialization in a single InGaAs quantum dot
T. M. Godden, S. J. Boyle, A. J. Ramsay +2
We demonstrate fast initialization of a single hole spin captured in an InGaAs quantum dot with a fidelity F>99% by applying a magnetic field parallel to the growth direction. We s…
Phonon induced Rabi frequency renormalization of optically driven single InGaAs/GaAs quantum dots
A. J. Ramsay, T. M. Godden, S. J. Boyle +5
We study optically driven Rabi rotations of a quantum dot exciton transition between 5 and 50 K, and for pulse-areas of up to . In a high driving field regime, the decay of th…
Two qubit conditional quantum logic operation in a single self-assembled quantum dot
S. J. Boyle, A. J. Ramsay, F. Bello +4
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 conditi…