2 research outputs found
The nitrogen-vacancy center in diamond re-visited
Symmetry considerations are used in presenting a model of the electronic
structure and the associated dynamics of the nitrogen-vacancy center in
diamond. The model accounts for the occurrence of optically induced spin
polarization, for the change of emission level with spin polarization and for
new measurements of transient emission. The rate constants given are in
variance to those reported previously.Comment: 12 pages 10 figure
Brokered Graph State Quantum Computing
We describe a procedure for graph state quantum computing that is tailored to
fully exploit the physics of optically active multi-level systems. Leveraging
ideas from the literature on distributed computation together with the recent
work on probabilistic cluster state synthesis, our model assigns to each
physical system two logical qubits: the broker and the client. Groups of
brokers negotiate new graph state fragments via a probabilistic optical
protocol. Completed fragments are mapped from broker to clients via a simple
state transition and measurement. The clients, whose role is to store the
nascent graph state long term, remain entirely insulated from failures during
the brokerage. We describe an implementation in terms of NV-centres in diamond,
where brokers and clients are very naturally embodied as electron and nuclear
spins.Comment: 5 pages, 3 figure