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Towards coherent optical control of a single hole spin: Rabi rotation of a trion conditional on the spin state of the hole
A. J. Ramsay, S. J. Boyle, T. M. Godden +8
A hole spin is a potential solid-state q-bit, that may be more robust against nuclear spin induced dephasing than an electron spin. Here we propose and demonstrate the sequential p…
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…
Quantum-fluid dynamics of microcavity polaritons
A. Amo, D. Sanvitto, D. Ballarini +9
Semiconductor microcavities offer a unique system to investigate the physics of weakly interacting bosons. Their elementary excitations, polaritons--a mixture of excitons and photo…
Intersublevel Polaron Dephasing in Self-Assembled Quantum Dots
E. A. Zibik, T. Grange, B. A. Carpenter +9
Polaron dephasing processes are investigated in InAs/GaAs dots using far-infrared transient four wave mixing (FWM) spectroscopy. We observe an oscillatory behaviour in the FWM sign…
Fast optical preparation, control and read-out of single quantum dot spin
A. J. Ramsay, S. J. Boyle, R. S. Kolodka +6
We propose and demonstrate the sequential initialization, optical control, and read-out of a single spin trapped in a semiconductor quantum dot. Hole spin preparation is achieved t…
Bistability of optically-induced nuclear spin orientation in quantum dots
A. Russell, Vladimir I. Fal'ko, A. I. Tartakovskii +1
We demonstrate that bistability of the nuclear spin polarization in optically pumped semiconductor quantum dots is a general phenomenon possible in dots with a wide range of parame…