Faculty

	Lucien Hardy PhD Durham (1992) Quantum Foundations
	Phone:	(519) 569-7600 x7521
	Email:	lhardy[at]perimeterinstitute.ca

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Lucien Hardy received his PhD at Durham University in 1992 under the supervision of Professor Euan J Squires. He has held research and lecturing positions in various cities across Europe. While in Rome Lucien collaborated on an experiment to demonstrate quantum teleportation. In 1992 he found a very simple proof of non-locality in quantum theory which has become known as Hardy’s theorem.

Affiliations

University of Waterloo

Positions Held

• 1997-2002 Royal Society University Research Fellow, University of Oxford
• 1996-1997 Postdoctoral position at La Sapienza University, Rome, Italy.
• 1994-1996 Lecturer in Mathematical Sciences Department, University of Durham, UK
• 1993-1994 Royal Society postdoctoral fellow at the University of Innsbruck, Austria
• 1992-1993 Lecturer in Mathematical Physics, Maynooth College, The National University of Ireland.

Recent Publications

• Towards Quantum Gravity: A Framework for Probabilistic Theories with Non-Fixed Causal Structure}, J. Phys. A 40, 3081 (2007), gr-qc/0608043.
• Hardy, L; Kent, A; {\sl Cheat sensitive quantum bit commitment}, Phys. Rev. Lett. 92, 157901 (2004).
• Hardy, L; {\sl Quantum ontological excess baggage}, Stud. Hist. Phil. Sci. B 35 267 (2004)
• Jonathan Barrett (Universite Libre de Bruxelles), Lucien Hardy (Perimeter Institute), Adrian Kent (Centre for Quantum Computation, DAMTP, University of Cambridge), No Signalling and Quantum Key Distribution, Phys. Rev. Lett. 95, 010503 (2005), arxiv: quant-ph/0405101, 2004-05-18
• Galvao, E; Hardy, L; Substituting a qubit for an arbitrarily large number of classical bits, Phys. Rev. Lett. 90, 087902 (2003)
• Walgate, J; Hardy, L; Nonlocality, asymmetry, and distinguishing bipar- tite states, Phys. Rev. Lett. 89 147901 (2002).
• Walgate, J; Short, AJ; Hardy, L; Vedral,V. Local Distinguishability of Multipartite Orthogonal Quantum States Authors, Phys. Rev. Lett. 85, 4972 (2000).
• Hardy, L; Song, DD. Entanglement swapping chains for general pure states, Phys. Rev. A 62, 052315 (2000).
• Kwiat, PG; Hardy, L. The mystery of the quantum cakes, Amer. J. Phys. 68, 33 (2000).
• Boschi, D; Branca, S; De Martini, F; Hardy, L; Popescu, S. Experimental realization of teleporting an unknown pure quantum state via dual classical and Einstein-Podolsky-Rosen channels, Phys. Rev. Lett. 80, 1121 (1998).
• Blasi, B; Hardy, L. Realism and time symmetry in quantum mechanics, Phys. Lett. A 207, 3 (1995).
• Hardy, L. Nonlocality of a single-photon revisited, Phys. Rev. Lett. 73, 2279 (1994).
• Hardy, L. Nonlocality for 2 particles without inequalities for almost-all entangled states, Phys. Rev. Lett. 71, 1665 (1993).
• Hardy, L. On the existence of empty waves in quantum-theory - reply, Phys. Lett. A 175, 259 (1993).
• Hardy, L. On the existence of empty waves in quantum-theory, Phys. Lett. A 167, 11 (1992).
• Hardy, L. Quantum-mechanics, local realistic theories, and lorentz- in- variant realistic theories, Phys. Rev. Lett. 68, 2981 (1992).
• Hardy, L. Can classical wave theory explain the photon anticorrelation e(R)ect on a beam splitter, Europhys. Lett. 15, 591 (1991).
• Foliable Operational Structures for General Probabilistic Theories, arxiv: 0912.4740, 2009-12-01
• Entropy for theories with indefinite causal structure, Sonia Markes and Lucien Hardy, arxiv: 0910.1323, 2009-10-01
• Probability Theories with Dynamic Causal Structure: A New Framework for Quantum Gravity, Lucien Hardy, arxiv: gr-qc/0509120, 2005-09-29
• Quantum Theory from five reasonable axioms, Lucien Hardy, arxiv: quant-ph/0101012, 2001-01-01
• Disentangling nonlocality and teleportation, Lucien Hardy, arxiv: quant-ph/9906123, 1999-06-01
• Quantum gravity computers: On the theory of computation with indefinite causal structure}, quant-ph/0701019, for proceedings of "Quantum Reality, Relativistic Causality, and Closing the Epistemic Circle: An International Conference in Honour of Abner Shimony" (2007).
• Hardy, L; Quantum gravity computers: On the theory of computation with inde?nite causal structure, quant-ph/0701019, for proceedings of "Quantum Reality, Relativistic Causality, and Closing the Epistemic Circle: An International Conference in Honour of Abner Shimony" (2007).
• Formalism Locality in Quantum Theory and Quantum Gravity, (also at arxiv: 0804.0054, 2008-04-01
• Why is nature described by quantum theory? in Science and Ultimate Reality, eds. John Barrow, Paul Davies, and Charles Harper, (Cambridge, 2004).

Seminars

• Computing with quantum stuff, at Conference on quantum information and quantum control III, Toronto, 2009-08-01
• Natural postulates for quantum theory, at On the nature of the laws of physics, Beyond Center, Arizona, 2008-12-01
• Natural postulates for quantum theory, at Workshop on informatic phenomena, New Orleans, 2008-10-01
• An operational approach to Quantum Gravity}, University of Oxford, Computer Science Dept. , 2008-06-01
• The Causaloid Framework: A tentative framework for Quantum Gravity, at The UK Foundations Conference, Leeds March 2007., 2008-03-01
• The causaloid approach to quantum theory and quantum gravity, at Logic, Physics and Quantum Information Theory, Bellairs, Barbados. , 2008-03-01
• Quantum foundations and quantum gravity}, at PIAF workshop in quantum foundations, Sydney., 2008-02-01
• An Operational Framework for a Theory of Quantum Gravity, at Deep Beauty, Princeton, 2007-10-01
• A foil for quantum gravity, at Foils workshop, Cambridge , 2007-07-01
• Time symmetry and quantum gravity, at Weak values and weak measurements, Arizona., 2007-06-01
• The Causaloid Framework: A tentative framework for Quantum Gravity, at Loops 07, Morellia Mexico., 2007-06-01
• The Causaloid Framework: A tentative framework for Quantum Gravity at Philosophical and formal foundations of quantum physics, Les Treilles., 2007-04-01
• Quantum theory from reasonable postulates}, University of Birmingham, Physics Dept., 2006-11-01
• Probability theories with non-fixed causal structure: a new framework for quantum gravity}, University of Cambridge, 2006-05-01
• Beyond quantum theory: Information and entanglement in general probabilistic frameworks, at Foundations of quantum information and entanglement, Boston., 2006-05-01
• From quantum foundations to quantum gravity, at APS March meeting, Focus session: Foundations of Quantum Theory, Baltimore., 2006-03-01
• Generalized Probability theories and how to go beyond Quantum Theory}, Wayne State University, Detroit., 2005-11-01
• Generalized probability theories with dynamic causal structure: a new approach to quantum gravity, at Being Baysian in a quantum world, Konstanz., 2005-06-01
• Why quantum theory?, at Endophysics, time, quantum and the subjective, Bielefeld., 2005-05-01
• Probabilistic theories with dynamical causal structure, at - On the present status of quantum mechanics, Losinj, Croatia., 2005-04-01
• The what and the why of quantum theory}, Philosophy dept, Dalhousie University, Halifax., 2005-02-01
• Composite systems in quantum theory and beyond, at the 13th UK Meeting on the Foundations of Physics, York UK., 2004-09-01
• Cheat sensitive quantum bit commitment, at Special Week on Quantum Cryptography, Newton Institute, Cambridge., 2004-06-01
• Are the laws of quantum theory a consequence of the human condition?, at Subtle Technologies, Toronto., 2003-05-01
• Quantum theory as an example of a probability theory with special focus on composite systems}, at - New Directions in the Foundations of Physics, Washington., 2003-04-01
• Cheat sensitive bit commitment}, at CIAR Quantum Information Processing Program Meeting, Banff, Alberta., 2003-02-01
• Quantum theory from reasonable axioms}, Philosophy Dept, University of Western Ontario., 2002-12-01
• Quantum theory from reasonable axioms, at Quantum foundations in the light of quantum information, Montreal, 2002-11-01