Publications associated with Ultrafast quantum optics and optical metrology


Continuous-variable quantum computing in optical time-frequency modes using quantum memories

Physical Review Letters 113 (2014)

PC Humphreys, WS Kolthammer, J Nunn, M Barbieri, A Datta, IA Walmsley

© 2014 American Physical Society. We develop a scheme for time-frequency encoded continuous-variable cluster-state quantum computing using quantum memories. In particular, we propose a method to produce, manipulate, and measure two-dimensional cluster states in a single spatial mode by exploiting the intrinsic time-frequency selectivity of Raman quantum memories. Time-frequency encoding enables the scheme to be extremely compact, requiring a number of memories that are a linear function of only the number of different frequencies in which the computational state is encoded, independent of its temporal duration. We therefore show that quantum memories can be a powerful component for scalable photonic quantum information processing architectures.


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