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

Journal article

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.

Authors: Humphreys, P; Kolthammer, W; Nunn, J; Barbieri, M; Datta, A

• Journal: Physical Review Letters
• Volume: 113
• Issue: 13
• Pages: 130502
• Publication date: 2014-09-01
• DOI: 10.1103/physrevlett.113.130502
• EISSN: 1079-7114
• ISSN: 0031-9007
• Language: English