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BSc (Hons), Macquarie University, Sydney
PhD Australian National University, Canberra

Professor of Physics University of Queensland
Centre Node Manager Queensland
Program Manager Linear Optics Quantum Computation - Theory
Australian Professorial Fellow


Tim has extensive experience in theoretical and experimental quantum optics as well as optical implementations of quantum information techniques. Tim had postdoctoral experience at the University of Auckland before being awarded an Australian Postdoctoral Fellowship at the ANU. He moved to the University of
Queensland in July 1999 and took up a QEII Research Fellowship there the following year. Tim has recently been awarded an Australian Professorial Fellowship. Tim managed the Linear Optics Quantum Computation Program established in late 2000, until 2003 when it
was enlarged and split into two programs, theory and experiment, within the new COE. Tim now takes responsibility for the theory component. The program seeks to demonstrate the feasibility and scalability of quantum computational gates based on linear optics and electro-optic feedforward techniques.

  1. J.L. O'Brien, G.J. Pryde, A.G. White, T.C. Ralph and D. Branning, "Demonstration of an all-optical quantum control-NOT gate", Nature 426, 264 (2003). Abstract

  2. T.C. Ralph and P.K.Lam, "Teleportation with Bright Squeezed Light", Physical Review Letters 81, 5668 (1998). Abstract

  3. G.J. Pryde, J.L. O'Brien, A.G. White, S.D. Bartlett and T.C. Ralph, "Measuring a photonic qubit without destroying it", Physical Review Letters, 92, 190402 (2004). Abstract

  4. W.P.Bowen, R.Schnabel, P.K.Lam, T.C. Ralph, "An Experimental Investigation of Criteria for Continuous Variable Entanglement", Physical Review Letters 90, 043601 (2003). Abstract

  5. C. Silberhorn, T.C. Ralph, N. Lutkenhaus and G. Leuchs, "Continuous Variable Key Distribution - Beating the 3 dB loss limit", Physical Review Letters 89, 167901 (2002). Abstract

  6. T.C. Ralph, W.J.Munro and R.E.S.Polkinghorne, "Proposal for the Measurement of Bell-like Correlations from Continuous Variables", Physical Review Letters 85, 2035 (2000). Abstract

  7. T.C. Ralph, "Continuous Variable Quantum Cryptography", Physical Review A, Rapid Communications 61, 010303 (2000). Abstract

  8. R.E.S.Polkinghorne and T.C. Ralph, "Continuous Variable Entanglement Swapping", Physical Review Letters 83, 2095 (1999). Abstract

  9. J.L O'Brien, G.J. Pryde, A. Gilchrist, D.F.V James, N.K Langford,
    T.C Ralph and A.G White, "Quantum process tomography of a controlled-NOT gate", Physical Review Letters 93, 080502 (2004). Abstract

  10. P.K.Lam, T.C.Ralph, E.H.Huntington and H-A Bachor, "Noiseless Signal Amplification using Positive Electro-Optic Feedforward" Physical Review Letters 79, 1471 (1997). Abstract


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