Quantum information processing promises a fundamentally more powerful way of computation and communication than traditional classical information processing. Using the quantum properties of matter allows us to solve some important computational problems that are classically “hard”, and gives us a way to protect cryptographic key distribution from eavesdroppers. Quantum mechanics even allows us to make measurements that are more precise than classical measurements. In Sheffield we develop new quantum information processing technologies in the solid state. In particular, we can coherently control qubit degrees of freedom in self-assembled quantum dots, and we are creating integrated quantum circuits on semiconductor chips. As a first step towards new quantum technologies, we aim to create a quantum repeater that allows us to extend quantum communication protocols from a few kilometres to hundreds or even thousands of kilometres.
Recent publications
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2020
Nuclear spin quantum register in an optically active semiconductor quantum dot
2017
Unifying gate-synthesis and magic state distillation
Unified framework for magic state distillation and multiqubit gate synthesis with reduced resource cost
2016
An efficient magic state approach to small angle rotations
Renormalizing entanglement distillation
2015
Cellular-automaton decoders for topological quantum memories
Qudit Colour Codes and Gauge Colour Codes in All Spatial Dimensions
2013
Parameter estimation using NOON states over a relativistic quantum channel
Cluster-state generation with aging qubits
2012
Superresolving Multiphoton Interferences with Independent Light Sources
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