Distributed quantum computing with macroscopic heralding
Quantum computing schemes based on the detection of single photons promise very high fidelities and are robust and scalable. However, their efficiency is strongly limited by the size of the currently available efficiency for the detection of single photons. Even when reliable single photon sources become available, such schemes can probably not be used to realise quantum algorithms with 10 and more qubits.
To overcome the detection problem, we will work on alternative quantum computing architectures, in which the successful state preparation is not heralded by only a single photon but by many. In this way, we hope to be able to derive cluster state preparation schemes for one-way quantum computing, which require neither the coherent evolution of product states nor the detection of single photons. Instead, the preparation of the desired state should be heralded by an easy-to-detect macroscopic fluorescence signal.
For further information please contact: Almut Beige, Quantum Information Group, University of Leeds