2003 - 06: Caltech (postdoc),
2006 - 07: Perimeter Institute (postdoc),
Since 2008: UBC (faculty)
Sloan Research Fellow (2009 - 11)
My research is quantum information, particularly computation. I have invented, with Hans Briegel, the so-called one-way quantum computer. It is a scheme of quantum computation driven by local projective measurements on an entangled resource state, the so-called cluster state. Entanglement in the resource is consumed as the computation proceeds.
Subsequently, with my co-workers J. Harrington (LANL) and K. Goyal (Caltech) I have described a scheme of fault-tolerant quantum computation for qubits arranged in a 2D lattice which only requires nearest-neighbor translation-invariant Ising interaction + local operation (2007). This scheme yields the highest known fault-tolerance threshold for a 2D architecture.
I am currently very interested in the relation of quantum computation to symmetry-protected topological order, and to Bell-nonlocality and contextuality.
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J Bermejo-Vega, N Delfosse, DE Browne, C Okay, R Raussendorf, Contextuality as a resource for qubit quantum computation, Phys. Rev. Lett. 119, 120505 (2017).
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Stephen, DT; Wang, DS; Prakash, A; Wei, TC; Raussendorf, R, Computational Power of Symmetry- Protected Topological Phases, Phys. Rev. Lett 119, 010504 (2017).
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R. Raussendorf and H.-J. Briegel, Computational model underlying the one-way quantum computer, Quant. Inf. Comp. 6, 443 (2002).
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R. Raussendorf and H.-J. Briegel, A one-way quantum computer, (preprint version is entitled ``Quantum computing via measurements only'', Phys. Rev. Lett. 86, 5188 (2001).
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R. Raussendorf and J. Harrington, Fault-tolerant quantum computation with high threshold in two dimensions, Phys. Rev. Lett. 98, 190504 (2007).