Refereed publications
2008
T. J. Weinhold, A. Gilchrist, K. J. Resch, A. C. Doherty, J. L. O'Brien, G. J. Pryde, and A. G. White, Understanding photonic quantum-logic gates: The road to fault tolerance, arxiv 0808.0794 (2008). B. P. Lanyon, M. Barbieri, M. P. Almeida, and A. G. White, Experimental quantum computing without entanglement, arxiv 0807.0668 (2008). B. P. Lanyon, M. Barbieri, M. P. Almeida, T. Jennewein, T. C. Ralph, K. J. Resch, G. J. Pryde, J. L. O'Brien, A. Gilchrist and A. G. White, Quantum computing using shortcuts through higher dimensions, arxiv 0804.0272 (2008).	S. Kleinlogel and A. G. White, The secret world of shrimps: polarisation vision at its best, PLoS ONE 3, e2190 (2008). doi:10.1371/journal.pone.0002190. B. P. Lanyon, T. J. Weinhold, N. K. Langford, J. L. O'Brien, K. J. Resch, A. Gilchrist, and A. G. White, Manipulating biphotonic qutrits, Physical Review Letters 100, 060504 (2008). doi:10.1103/PhysRevLett.100.060504.
2007
B. P. Lanyon, T. J. Weinhold, N. K. Langford, M. Barbieri, D. F. V. James, A. Gilchrist, and A. G. White, Experimental demonstration of Shor's algorithm with quantum entanglement, Physical Review Letters 99, 250505 (2007). doi:10.1103/PhysRevLett.99.250505. K. J. Resch, K. L. Pregnell, R. Prevedel, A. Gilchrist, G. J. Pryde, J. L. O'Brien, and A. G. White, Time-reversal and super-resolving phase measurements, Physical Review Letters 98, 223601 (2007). doi:10.1103/PhysRevLett.98.223601.	K. J. Resch, J. L. O'Brien, T. J. Weinhold, K. Sanaka, B. P. Lanyon, and N. K. Langford, and A. G. White, Entanglement generation by Fock- state filtration, Physical Review Letters 98, 203602 (2007). doi:10.1103/PhysRevLett.98.203602. A. G. White, A. Gilchrist, G. J. Pryde, J. L. O'Brien, M. J. Bremner, and N. K. Langford, Measuring two-qubit gates, Journal of the Optical Society of America B 24, 172-183 (2007). A. Gilchrist, K. J. Resch, and A. G. White, Source of triggered entangled photon pairs?, Nature 445, E4 (2007). doi:10.1038/nature05546.
2006
J. E. de Albuquerque, C. Giacomantonio, A. G. White, and P. Meredith, Study of optical properties of electropolymerized melanin films by photopyroelectric spectroscopy, European Biophysics Journal with Biophysics Letters 35, 190-195 (2006).
2005
N. K. Langford, T. J. Weinhold, R. Prevedel, A. Gilchrist, J. L. O'Brien, G. J. Pryde, and A. G. White, Demonstration of a simple entangling optical gate and its use in Bell-state analysis, Physical Review Letters 95, 210504 (2005). J. E. de Albuquerque, C. Giacomantonio, A. G. White, and P. Meredith, Determination of thermal and optical parameters of melanins by photopyroelectric spectroscopy, Applied Physics Letters 87, 061920 (2005). G. J. Pryde, J. L. O'Brien, A. G. White, S. D. Bartlett, and T. C. Ralph, Measuring a photonic qubit without destroying it - Response, Physical Review Letters 95, 048902 (2005).	G. J. Pryde, J. L. O'Brien, A. G. White, and S. D. Bartlett, Demonstrating Superior Discrimination of Locally Prepared States Using Nonlocal Measurements, Physical Review Letters 94, 220406 (2005). G. J. Pryde, J. L. O'Brien, A. G. White, T. C. Ralph, and H. M. Wiseman, Measurement of Quantum Weak Values of Photon Polarization, Physical Review Letters 94, 220405 (2005). J. L. O'Brien, G. J. Pryde, A. G. White, and T. C. Ralph, High-fidelity Z-measurement error encoding of optical qubits, Physical Review A 71, 060303(R) (2005).
2004
A. Ratnapala, C. J. Vale, A. G. White, M. D. Harvey, N. R. Heckenberg, and H. Rubinsztein-Dunlop, Laser frequency locking by direct measurement of detuning, Optics Letters 29, 2704 (2004). 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).	N. K. Langford, R. B. Dalton, M. D. Harvey, J. L. O'Brien, G. J. Pryde, A. Gilchrist, S. D. Bartlett, and A. G. White, Entangled qutrits: production and characterisation, Physical Review Letters 93, 053601 (2004). 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).
2003
G. J. Pryde and A. G. White, Creation of maximally entangled photon number states using optical fibre multiports, Physical Review A, 68, 052315 (2003). J. L. O'Brien, G. J. Pryde, A. G. White, T. C. Ralph, and D. Branning, Demonstration of an all-optical quantum controlled-NOT gate, Nature 426, 264 (2003). Click here for press and media accounts of this paper. P. A. Roos, S. K. Murphy, L. S. Meng, J. L. Carlsten, T. C. Ralph, A. G. White and J. K. Brasseur, Quantum theory of the far-of-resonance cw Raman laser: Heisenberg / Langevin approach, Physical Review A 68, 013802 (2003).	M. D. Harvey and A. G. White, Frequency locking by analysis of orthogonal modes, Optics Communication 221, 163 (2003). J. B. Altepeter, D. Branning, E. Jeffrey, T. C. Wei, P. G. Kwiat, R. T. Thew, J. L. O'Brien, M. A. Nielsen, and A. G. White, Ancilla-assisted quantum process tomography, Physical Review Letters 90 193601 (2003). A. Gilchrist, W. J. Munro, and A. G. White, Input states for quantum gates, Physical Review A 67, 040304(R) (2003).
2002
A. Gilchrist, A. G. White and W. J. Munro, Entanglement creation using quantum interrogation, Physical Review A 66, 012106 (2002). R. T. Thew, K. Nemoto, A. G. White, and W. J. Munro, Qudit quantum-state tomography, Physical Review A 66, 012303 (2002)	T. C. Ralph, N. K. Langford, T. B. Bell, and A. G. White, Linear optical controlled-NOT gate in the coincidence basis, Physical Review A 65, 062324 (2002)
2001
M. S. Gulley, A. G. White, and D. F. V. James, A Raman approach to quantum logic in Calcium-like ions, arXiv:quant-ph/0112117 (2001). A. G. White, D. F. V. James, W. J. Munro, and P. G. Kwiat, Exploring Hilbert space: Accurate characterization of quantum information, Physical Review A 65, 012301 (2001). T. C. Ralph, A. G. White, and G. J. Milburn, Simple Scheme for Efficient Linear Optics Quantum Gates, Physical Review A 65, 012314 (2001). G. Kociuba, N. R. Heckenberg, A. G. White, Simple Transforming chaos to periodic oscillations, Physical Review E 64, 056220 (2001).	D. F. V. James, P. G. Kwiat, W. J. Munro, and A. G. White, Measurement of qubits, Physical Review A 64, 052312 (2001). W. J. Munro, D. F. V. James, A. G. White, and P. G. Kwiat, Maximizing the entanglement of two mixed qubits, Physical Review A 64, 030302 (R) (2001). W. J. Munro, K. Nemoto, and A. G. White, The Bell inequality: a measure of entanglement?, Journal of Modern Optics 48, 239-1246 (2001).
2000
A. G. White, P. K. Lam, D. E. McClelland, H.-A. Bachor, and W. J. Munro, Kerr noise reduction in a frequency doubler, Journal of Optics B: Quantum and Semiclassical Optics 2, 553-561 (2000). P. G. Kwiat, A. J. Berglund, J. B. Altepeter, and A. G. White, Experimental verification of decoherence-free subspaces, Science 290, 498-501 (2000). D. G. Enzer, M. M. Schauer, J. J. Gomez, M. S. Gulley, M. H. Holzscheiter, P. G. Kwiat, S. K. Lamoreaux, C. G. Peterson, V. D. Sandberg, D. Tupa, A. G. White, R. J. Hughes, and D. F. V. James, Observation of Power-Law Scaling for Phase Transitions in Linear Trapped Ion Crystals, Physical Review Letters 85, 2466-2470 (2000).	D. S. Naik, C. G. Peterson, A. G. White, A. J. Berglund, and P. G. Kwiat, Entangled state quantum cryptography: Eavesdropping on the Ekert protocol, Physical Review Letters 84, 4733-4736 (2000). P. G. Kwiat, J. R. Mitchell, P. D. D. Schwindt, and A. G. White, Grover's search algorithm: An optical approach, Journal of Modern Optics 47, 257-266 (2000).
1999
P. G. Kwiat, A. G. White, J. R. Mitchell, O. Nairz, G. Weihs, H. Weinfurter, and A. Zeilinger, High-efficiency quantum interrogation measurements via the quantum Zeno effect, Physical Review Letters 83, 4725-4728 (1999). A. G. White, D. F. V. James, P. H. Eberhard and P. G. Kwiat, Non-maximally entangled states: production, characterisation and utilisation, Physical Review Letters 83, 3103-3106 (1999).	P. G. Kwiat, E. Waks, A. G. White, I. Appelbaum, and P. H. Eberhard, Ultra-bright source of polarization-entangled photons, Physical Review A 60, R773-R776 (1999).
1998
A. G. White, J. R. Mitchell, O. Nairz, and P. G. Kwiat, "Interaction-free" imaging, Physical Review A 58, 605-608 (1998).	R. J. Hughes, D. F. V. James, J. J. Gomez, M. S. Gulley, M. H. Holzscheiter, P. G. Kwiat, S. L. Lamoreaux, C. G. Peterson, V. D. Sandberg, M. M. Schauer, C. M. Simmons, C. E. Thorburn, D. Tupa, P. Z. Wang and A. G. White, The Los Alamos Trapped Ion Quantum Computer Experiment, Fortschritte der Physik 46, 329-361 (1998).
1997
A. G. White, P. K. Lam, M. S. Taubman, M. A. M. Marte, S. Schiller, D. E. McClelland and H.-A. Bachor, Classical and quantum signatures of competing chi(2) nonlinearities, Physical Review A 55, 4511-4515 (1997). S. Schiller, R. Bruckmeier and A. G. White, Classical and quantum properties of the subharmonic-pumped parametric oscillator Optics Communications 138, 158-171 (1997).	A. G. White, T. C. Ralph, H.-A. Bachor, Noiseless amplification in cavity based optical systems with an internal two-photon process: Comment", Journal of Modern Optics 44, 651-652 (1997).
1996
A. G. White, M. S. Taubman, T. C. Ralph, P. K. Lam, D. E. McClelland, & H.-A. Bachor, Experimental test of modular noise propagation theory for quantum optics, Physical Review A 54, 3400-3404 (1996). A. G. White, J. Mlynek and S. Schiller, Cascaded second-order nonlinearity in an optical cavity, Europhysics Letters 35, 425-430 (1996).	A. G. White, T. C. Ralph, H.-A. Bachor, Active versus passive squeezing via second harmonic generation, Journal of the Optical Society of America B 13, 1337-1346 (1996).
1995
H.-A. Bachor, T. C. Ralph, M. S. Taubman, A. G. White, C. C. Harb, and D.E.McClelland, Progress in the search for the optimum light source: squeezing experiments with a frequency doubler, Journal of Quantum and Semiclassical Optics 7, 715-726 (1995). T. C. Ralph, M. S. Taubman, A. G. White, D. E. McClelland, and H.-A. Bachor, Squeezed light from second harmonic generation: experiment versus theory, Optics Letters 20, 1316-1318 (1995).	T. C. Ralph and A. G. White, Retrieving squeezing from classically noisy light, Journal of the Optical Society of America B 12, 833-839 (1995).
1991/2
N. R. Heckenberg, R. McDuff, C. P. Smith, and A. G. White, "Generation of optical phase singularities by computer-generated holograms, Optics Letters 17, 221-223 (1992). A. G. White, C. P. Smith, N. R. Heckenberg, H. Rubinsztein-Dunlop, R. McDuff, C. O. Weiss and C. Tamm, Interferometric measurements of phase singularities in the output of a visible laser, Journal of Modern Optics 38, 2531-2541 (1991).	A. E. Stuchbery, A. G. White, G. D. Dracoulis, K. J. Schiffer and B. Fabricius, Gyromagnetic ratios of low-lying rotational states in Gd156, Gd158, Gd160, Zeitschrift für Physik A - Hadrons and Nuclei 338, 135-138 (1991).

Virtual Journal Publications

K. J. Resch, K. L. Pregnell, R. Prevedel, A. Gilchrist, G. J. Pryde, J. L. O'Brien, and A. G. White, Time-reversal and super-resolving phase measurements, Virtual Journal of Quantum Information 7, no. 6, June (2007). K. J. Resch, J. L. O'Brien, T. J. Weinhold, K. Sanaka, B. P. Lanyon, and N. K. Langford, and A. G. White, Entanglement generation by Fock-state filtration, Virtual Journal of Quantum Information 7, no. 6, June (2007). A. G. White, A. Gilchrist, G. J. Pryde, J. L. O'Brien, M. J. Bremner, and N. K. Langford, Measuring two-qubit gates, Virtual Journal of Quantum Information 7, no. 2, February (2007). J. E. de Albuquerque, C. Giacomantonio, A. G. White, and P. Meredith, Determination of thermal and optical parameters of melanins by photopyroelectric spectroscopy, Virtual Journal of Biological Physics Research 10, no. 4, August 15 (2005). G. J. Pryde, J. L. O'Brien, A. G. White, S. D. Bartlett, and T. C. Ralph, Reply to comment, Virtual Journal of Quantum Information 5, no. 8, August (2005). G. J. Pryde, J. L. O'Brien, A. G. White, T. C. Ralph, and H. M. Wiseman, Measurement of Quantum Weak Values of Photon Polarization, Virtual Journal of Quantum Information 5, no. 7, July (2005). G. J. Pryde, J. L. O'Brien, A. G. White, and S. D. Bartlett, Demonstrating Superior Discrimination of Locally Prepared States Using Nonlocal Measurements, Virtual Journal of Nanoscale Science & Technology 11, no. 24, June 20 (2005). G. J. Pryde, J. L. O'Brien, A. G. White, and S. D. Bartlett, Demonstrating Superior Discrimination of Locally Prepared States Using Nonlocal Measurements, Virtual Journal of Quantum Information 5, no. 6, June (2005). J. L. O'Brien, G. J. Pryde, A. G. White, and T. C. Ralph, High-fidelity Z-measurement error encoding of optical qubits, Virtual Journal of Quantum Information 5, no. 6, June (2005). 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, Virtual Journal of Quantum Information 4, no. 9, September (2004). N. K. Langford, R. B. Dalton, M. D. Harvey, J. L. O'Brien, G. J. Pryde, A. Gilchrist, S. D. Bartlett, and A. G. White, Measuring Entangled Qutrits and Their Use for Quantum Bit Commitment, Virtual Journal of Quantum Information 4, no. 8, August (2004). G. J. Pryde, J. L. O'Brien, A. G. White, S. D. Bartlett, and T. C. Ralph, Measuring a photonic qubit without destroying it, Virtual Journal of Quantum Information, 4, no. 5, May (2004). J. L. O'Brien, G. J. Pryde, A. G. White, T. C. Ralph, and D. Branning, Demonstration of an all-optical quantum controlled-NOT gate, Virtual Journal of Nanoscale Science & Technology 8, no. 22, December 1 (2003).

J. L. O'Brien, G. J. Pryde, A. G. White, T. C. Ralph, and D. Branning, Demonstration of an all-optical quantum controlled-NOT gate, Virtual Journal of Quantum Information, 3, no. 12, December (2003). G. J. Pryde and A. G. White, Creation of maximally entangled photon number states using optical fibre multiports, Virtual Journal of Quantum Information, 3, no. 12, December (2003). A. Gilchrist, W. J. Munro, and A. G. White, Input states for quantum gates, Virtual Journal of Quantum Information, 3, no. 5, May (2003). J. B. Altepeter, D. Branning, E. Jeffrey, T. C. Wei, P. G. Kwiat, R. T. Thew, J. L. O'Brien, M. A. Nielsen, and A. G. White, Ancilla-assisted quantum process tomography, Virtual Journal of Nanoscale Science & Technology 7, no. 21, May 26 (2003). J. B. Altepeter, D. Branning, E. Jeffrey, T. C. Wei, P. G. Kwiat, R. T. Thew, J. L. O'Brien, M. A. Nielsen, and A. G. White, Ancilla-assisted quantum process tomography, Virtual Journal of Quantum Information 3, no. 5, May (2003). R. T. Thew, K. Nemoto, A. G. White, and W. J. Munro, Qudit quantum-state tomography, Virtual Journal of Quantum Information 2, no. 8, August (2002). A. Gilchrist, A. G. White and W. J. Munro, Entanglement creation using quantum interrogation, Virtual Journal of Quantum Information 2, no. 8, August (2002). T. C. Ralph, N. K. Langford, T. B. Bell and A. G. White, Linear optical controlled-NOT gate in the coincidence basis, Virtual Journal of Quantum Information 2, no. 7, July (2002). A. G. White, D. F. V. James, W. J. Munro, and P. G. Kwiat, Exploring Hilbert space: Accurate characterization of quantum information, Virtual Journal of Quantum Information 2, no. 1, January (2002). T. C. Ralph, A. G. White, and G. J. Milburn, Simple Scheme for Efficient Linear Optics Quantum Gates, Virtual Journal of Quantum Information 2, no. 1, January (2002). G. Kociuba, N. R. Heckenberg, A. G. White, Simple Transforming chaos to periodic oscillations, Virtual Journal of Quantum Information 1, no. 7, December (2001). D. F. V. James, P. G. Kwiat, W. J. Munro, and A. G. White, Measurement of qubits, Virtual Journal of Quantum Information 1, no. 6, November (2001). W. J. Munro, D. F. V. James, A. G. White, and P. G. Kwiat, Maximizing the entanglement of two mixed qubits, Virtual Journal of Quantum Information 1, no. 4, September (2001). P. G. Kwiat, A. J. Berglund, J. B. Altepeter, and A. G. White, Experimental verification of decoherence-free subspaces, Virtual Journal of Nanoscale Science & Technology 2, no. 18, October 30 (2000).

Book chapters

D. F. V. James, P. G. Kwiat, W. J. Munro, and A. G. White, Chapter 34: Measurement of Qubits, Collected Papers in Asymptotic Theory of Quantum Statistical Inference. Ed: Masahito Hayashi (World Scientific Press, 2004). G. J. Pryde, J. L. O'Brien, T. B. Bell, N. K. Langford, G. J. Milburn, T. C. Ralph, and A. G. White, Efficient linear optics quantum computation, Proceedings of the 6th International Conference on Experimental Implementation of Quantum Communication, Measurement and Computing, Ed: Jeffrey H. Shapiro and Osamu Hirota (Rinton Press, New Jersey, USA. 560 pages Hardcover, ISBN 1-58949-030-4) p.253 (2003). G. J. Milburn, T. C. Ralph, A. Gilchrist, A. G. White, W. J. Munro, and V. Kendon, Efficient linear optics quantum computation, Proceedings of the 6th International Conference on Experimental Implementation of Quantum Communication, Measurement and Computing, Ed: Jeffrey H. Shapiro and Osamu Hirota (Rinton Press, New Jersey, USA. 560 pages Hardcover, ISBN 1-58949-030-4) p. 229 (2003). T. C. Ralph, J. L. O'Brien, G. J. Pryde, A. Lund, N. K. Langford, A. G. White and G. J. Milburn, Investigation of two-qubit gates in linear optics, Proceedings of SPIE – Quantum Communications and Quantum Imaging, Ed: Ronald E. Meyers and Yanhua Shih, Proceedings of the SPIE, Volume 5161, pp. 161-170 (2004).

D. F. V. James, M. S. Gulley, M. H. Holzscheiter, R. J. Hughes, P. G. Kwiat, S. K. Lamoreaux, C. G. Peterson, V. D. Sandberg, M. M. Schauer, C. M. Simmons, D. Tupa, P. Z. Wang and A. G. White, Trapped ion quantum computer research at Los Alamos, Lecture notes in computer science: Quantum computing and quantum communications 1509, pp 426-437 (1999). T. C. Ralph, J. L. O'Brien, G. J. Pryde, A. Lund, N. K. Langford, A. G. White and G. J. Milburn, Investigation of two-qubit gates in linear optics, Proceedings of SPIE Ð Quantum Communications and Quantum Imaging N. R. Heckenberg, R. McDuff, C. P. Smith, and A. G. White, Generation of optical phase singularities by computer-generated holograms, Selected papers on Zone Plates (SPIE Optical Engineering Press, Washington, USA) p. 353-355 (1996).

Non-refereed publications

A. G. White, Quantum Information and Optics, Australian Optical Society News, March (2002). P. G. Kwiat, A. G. White and P. Eberhard, Polarization-Entangled Photons: The Next Generation, Optics and Photonics News, December. p. 39 (1999). A. G. White, D. F. V. James and P. G. Kwiat, Tomography of photon pairs, in: Program of 1999 OSA Annual Meeting/ILS-XV 15th Interdisciplinary Laser Science Conference, Optical Society of America, Washington, D.C., p. 132 (1999). P. G. Kwiat, J. R. Mitchell, P. D. D. Schwindt, and A. G. White, Optical Implementation of Grover's Algorithm: It's All Done with Mirrors, in: Proceedings of the 4th International conference on Quantum Communication, Measurement and Computing, Evanston, Illinois (1998). A. G. White, P. G. Kwiat and D. F. V. James, "Interaction-Free" measurements of Quantum objects?, in: Proceedings of the Workshop on Workshop on Mysteries, Puzzles, and Paradoxes in Quantum Mechanics, Ed: R. Bonifacio, American Institute of Physics, New York (1998). P. G. Kwiat, A. G. White, J. R. Mitchell, O. Nairz, G. Weihs, H. Weinfurter, and A. Zeilinger, What Does a Quantum Eraser Really Erase?, in: Proceedings of the Workshop on Mysteries, Puzzles, And Paradoxes In Quantum Mechanics, Ed: R. Bonifacio, American Institute of Physics, New York (1998). P. K. Lam, H.-A. Bachor, E. H. Huntington, T. C. Ralph, A. G. White, M. S. Taubman, C. C. Harb and D. E. McClelland, Making Squeezed Light Robust, in: Laser Spectroscopy XIII International Conference, Hangzhou, China, World Scientific, p. 293 (1998). T. C. Ralph, P. K. Lam, C. C. Harb, E. H. Huntington, A. G. White, M. S. Taubman, D. E. McClelland, and H.-A. Bachor, Optical engineering with squeezed light: laser noise spectra and noiseless amplifiers, in: Fifth international conference on squeezed states and uncertainty relations, Balatonfüred, Hungary. NASA/CP-1998-206855, p. 3-11 (1998).

M. S. Taubman, T. C. Ralph, A. G. White, P. K. Lam, H. M. Wiseman, D. E. McClelland, and H.-A. Bachor, A reliable source of squeezed light, and an accurate theoretical model, in: Lasers in Research & Engineering: Proceedings of the 12th International Congress, Ed: W. Waidelich et. al., Springer-Verlag (1996). A. G. White, P. K. Lam, M. S. Taubman, S. Schiller, D. E. McClelland, and H.-A. Bachor, Interacting chi(2) nonlinearities in quantum optics, in Chi(2) Workshop: Second Order Nonlinear Optics: from Fundamentals to Applications, Les Houches, France (1996). H.-A. Bachor, M. S. Taubman, T. C .Ralph, C. C. Harb, A. G. White & D. E. McClelland, Experiments and theory of laser noise: consequences for squeezing & injection locking, in: ICONO conference, St. Petersburg (1995). Proceedings of the SPIE, The International Society for Optical Engineering, 2799, 156 (1996). H.-A. Bachor, M. S. Taubman, A. G. White, T. C. Ralph, and D. E. McClelland, Experiments with lasers and frequency doublers, in: NASA Proceedings of the International Conference on Squeezed States and Uncertainty Principle, Taiyuan, China (1995). S. Schiller, G. Breitenbach, S. F. Pereira, R. Paschotta, A. G. White, and J. Mlynek, Generation of continuous-wave bright squeezed light, in: Y. Shevy (Ed.) "Laser Frequency Stabilisation and Noise Reduction", SPIE Proceedings, 2378 (1995). S. Schiller, S. F. Pereira, G. Breitenbach, T. MŸller, A. G. White, and J. Mlynek, Optical Tomography of a highly Squeezed, Continuous-wave Vacuum-state, 7th Conference on Coherence & Quantum Optics, University of Rochester (1995).

Patents

A. G. White and M. D. Harvey, Method and apparatus for precision measurement of phase shifts, International Patent Application PCT/AU2004/001160, lodged August 27, (2004). M. D. Harvey and A. G. White, Method and apparatus for detecting frequency change of electromagnetic radiation, International Patent Application PCT/AU2004/000591, lodged May 7 (2004). A. G. White and M. D. Harvey, Method and apparatus for precision measurement of phase shifts, Australian Provisional Patent #2003904613, lodged August 27, (2003).

M. D. Harvey and A. G. White, Method and apparatus for detecting frequency change of electromagnetic radiation, Australian Provisional Patent, lodged May 8 (2003). P. G. Kwiat, P. H. Eberhard and A. G. White, Ultra-bright source of polarization-entangled photons, United States Patent #6 424 665, granted July 23, (2002).

Press and media accounts

Robyn Williams, Quantum Computing, Science Show (7 May 2005). Jennifer Dudley, Einstein's next quantum leap, Courier Mail (17 Mar. 2005). Duncan McKimm, Quantum entanglement, ABC Science (Nov. 2004). Damian Pope, Quantum Leap for Computing, Australasian Science, (Jan./Feb. 2004). Light work of quantum computers, Monitor 28, 2 (Dec. 2003). Quantum computing breakthrough, The R & D Review, (Dec. 2003/Jan. 2004) Peter McCutcheon, Brisbane team leads ground-breaking project, The 7:30 Report (11 Dec. 2003). Heather Catchpole, Spooky bits propel quantum computer, ABC Science Online (25 Nov. 2003). Ian Townsend, Quantum computer in development, ABC PM Programme (24 Nov. 2003). Jenny Hogan, Optical gate kick-starts quantum computer race, New Scientist, p. 27 (22 Nov. 2003). Richard Chirgwin, Interview: UQ's Dr Andrew White - Quanta, Photons, and Things Hard to See,, Commsworld, (21 Nov. 2003). Richard Chirgwin, Untangling Quantum Computing at Queensland Uni - An Open and Shut Gate, Commsworld, (20 Nov. 2003).

Damian Pope, What Makes a Quantum Computer Tick, Australasian Science, (20 Nov. 2003). Paul C. W. Davies. Thanked for discussions in How to build a time machine, (Allen Lane/Penguin, ISBN: 0713995831, Nov. 2001). D. S. Burgess, Secretive Photons Create Unbreakable Codes, Photonics Spectra, pp. 48-50 (August 2000). J. Glanz, In the Quantum World, Keys to New Codes, The New York Times (Tuesday, May 2, 2000). P. F. Schewe and B. J. Stein, Exploiting quantum "spookiness" to create secret codes, Physics News Update, The American Institute of Physics Bulletin of Physics, Number 480 (Apr. 24, 2000). B. J. Stein, Nonlocality Gets More Real, Physics News Update, The American Institute of Physics Bulletin of Physics, Number 399, Oct. 26 (1998); Physics Today Alert, American Institute of Physics, Woodbury, NY 11797, Dec. (1998). Sehen, ohne stören, Neues Züricher Zeitung, Zurich, Switzerland, June 22 (1998). Harry Goldstein, Interaction-free imaging opens quantum world, Industrial R&D Alert, 29 May (1998). Robert Matthews, Quantum detectives, New Scientist, no. 2134, p. 11, 16 May (1998).

Theses

Honours thesis

Title: Submitted: Supervisors: Examiners:	Optical Pattern Formation and the Detection of Phase Singularities November 1990 Assoc.-Profs Norman Heckenberg, Halina Rubinsztein & Dr Carl Weiss Profs John Mainstone & Gerard Milburn

A high gain, high loss, sodium dimer laser was built to confirm the existence of the recently predicted and observed cooperatively frequency locked stationary patterns. These patterns were observed and a preliminary investigation undertaken of their stability. A striking feature in most of the steady state patterns observed was the presence of dark points, which have previously been proposed as corresponding to phase singularities. A possible interferometric technique to allow direct experimental detection of these singularities was investigated. Experimental results from this technique directly reveal the presence of phase singularities for the first time. The advantages and possible uses for this technique are discussed. Calibration of the interferometric technique via astigmatic imaging was attempted with limited success. Future directions for research in this area are proposed.

PhD thesis

Title: Submitted: Supervisors: Examiners:	Classical and quantum dynamics of optical frequency conversion March 1997 Prof. Hans-A. Bachor & Assoc.-Prof. David McClelland Assis.-Prof. Keren Bergman, & Drs Craig Savage and Andreas Sizmann

A second harmonic generator is constructed to investigate the power and noise behaviour of optical frequency conversion. Strong squeezing of the second harmonic is demonstrated. It is found that pump noise critically affects the squeezing, with attenuation of the pump noise significantly improving the squeezing. A modular modelling approach is used to describe and quantify this effect, and excellent agreement is found between theory and experiment. Two methods of SHG are possible, passive (occurs external to a laser) and active (occurs within a laser). Theoretically exploring the possible squeezing regimes, the effect of laser noise on both methods is considered. It is concluded that active SHG is not feasible, as the high dephasing of practical lasers totally destroys the squeezing. It is shown that the second harmonic generator can simultaneously support multiple, interacting, second order nonlinear processes. Two categories of interaction are identified: competing, where the interacting processes do not share all of the modes; and cooperating, where they do. Competing nonlinearities are evident in the system as triply resonant optical parametric oscillation (TROPO): where second harmonic generation (SHG) and non-degenerate optical parametric oscillation (NDOPO) occur simultaneously. Power clamping of the second harmonic and nondegenerate frequency production in both the visible and infrared are observed and explained, again obtaining good agreement between theory and experiment. Design criteria are given that allow TROPO to be avoided in future efficient SHG systems. The second harmonic squeezing is observed to be degraded by TROPO, with a maximum value occurring just before the onset of TROPO -- in contrast to predictions for closely related systems. A model is developed that shows this is due to two effects: a noise eating effect related to the second harmonic clamping; and low frequency noise added by the additional TROPO modes. A model of cooperating nonlinearities is developed that shows a wide variety of third order effects, including cross- and self phase modulation (Kerr effects) and two photon and Raman absorption, are in principle possible in the second harmonic generator. A strong third order effect is demonstrated experimentally: the system is phase mismatched and optical bistability is observed that is shown to be due to the Kerr effect. Arguments are presented to prove that, in principle, the system acts as a Kerr medium even at the quantum level. A model of Kerr squeezing is developed that allows consideration of the effect of pump noise: it is shown that the predicted squeezing is sensitive to both the amplitude and phase quadratures of the pump. Strong classical noise reduction (but no squeezing) is observed on light reflected from the cavity. It is speculated that the squeezing is masked by excess phase noise from the laser. Due to the quantitative and qualitative agreement between experiment and theory, and the experimental reliability of the system, it is concluded that SHG is now a well understood and practical source of squeezed light. The potential for future systems, given the availability of new nonlinear materials, is discussed.