Jeremy O'Brien

Last updated

Jeremy L. O'Brien
Born (1975-11-07) 7 November 1975 (age 45)
Alma mater University of New South Wales
Known for Quantum photonics
Scientific career
Fields quantum optics, optical quantum metrology, quantum information science
Institutions University of Queensland, University of Bristol

Jeremy O'Brien (born 1975, Australia [1] ) is a physicist who researches in quantum optics, optical quantum metrology and quantum information science. [2] As of 2010, he is Professorial Research Fellow in Physics and Electrical Engineering at the University of Bristol, and director of its Centre for Quantum Photonics. [3]


His work in optical quantum computing has included the demonstration of the first optical quantum controlled NOT gate. [4]

Honours and awards

Selected publications

Related Research Articles

This is a timeline of quantum computing.

In quantum computing, a quantum algorithm is an algorithm which runs on a realistic model of quantum computation, the most commonly used model being the quantum circuit model of computation. A classical algorithm is a finite sequence of instructions, or a step-by-step procedure for solving a problem, where each step or instruction can be performed on a classical computer. Similarly, a quantum algorithm is a step-by-step procedure, where each of the steps can be performed on a quantum computer. Although all classical algorithms can also be performed on a quantum computer, the term quantum algorithm is usually used for those algorithms which seem inherently quantum, or use some essential feature of quantum computation such as quantum superposition or quantum entanglement.

Electromagnetically induced transparency

Electromagnetically induced transparency (EIT) is a coherent optical nonlinearity which renders a medium transparent within a narrow spectral range around an absorption line. Extreme dispersion is also created within this transparency "window" which leads to "slow light", described below. It is in essence a quantum interference effect that permits the propagation of light through an otherwise opaque atomic medium.

Lene Hau Danish physicist

Lene Vestergaard Hau is a Danish physicist who is currently the Mallinckrodt Professor of Physics and of Applied Physics at Harvard University. She received a PhD from Aarhus University. In 1999, she led a Harvard University team who, by use of a Bose–Einstein condensate, succeeded in slowing a beam of light to about 17 metres per second, and, in 2001, was able to stop a beam completely. Later work based on these experiments led to the transfer of light to matter, then from matter back into light, a process with important implications for quantum encryption and quantum computing. More recent work has involved research into novel interactions between ultracold atoms and nanoscopic-scale systems. In addition to teaching physics and applied physics, she has taught Energy Science at Harvard, involving photovoltaic cells, nuclear power, batteries, and photosynthesis. As well as her own experiments and research, she is often invited to speak at international conferences, and is involved in structuring the science policies of various institutions. She was keynote speaker at EliteForsk-konferencen 2013 in Copenhagen, which was attended by government ministers, as well as senior science policy and research developers in Denmark. In acknowledgment of her many achievements, Discover Magazine recognized her in 2002 as one of the 50 most important women in science.

Quantum networks form an important element of quantum computing and quantum communication systems. Quantum networks facilitate the transmission of information in the form of quantum bits, also called qubits, between physically separated quantum processors. A quantum processor is a small quantum computer being able to perform quantum logic gates on a certain number of qubits. Quantum networks work in a similar way to classical networks. The main difference is that quantum networking, like quantum computing, is better at solving certain problems, such as modeling quantum systems.

John Rarity British physicist

John G. Rarity is professor of optical communication systems in the department of electrical and electronic engineering at the University of Bristol, a post he has held since 1 January 2003. He is an international expert on quantum optics, quantum cryptography and quantum communication using single photons and entanglement. Rarity is a member of the Quantum Computation and Information group and quantum photonics at the University of Bristol.

A NOON state is a quantum-mechanical many-body entangled state:

Jonathan Dowling Irish-American physicist specializing in quantum technology

Jonathan P. Dowling was an Irish-American researcher and professor in theoretical physics, known for his work on quantum technology, particularly for exploiting quantum entanglement for applications to quantum metrology, quantum sensing, and quantum imaging.

The field of quantum sensing deals with the design and engineering of quantum sources and quantum measurements that are able to beat the performance of any classical strategy in a number of technological applications. This can be done with photonic systems or solid state systems.

Yoshihisa Yamamoto (scientist) Japanese applied physicist (born 1950)

Yoshihisa Yamamoto is an applied physicist and the director of Physics & Informatics Laboratories, NTT Research, Inc. He is also Professor (Emeritus) at Stanford University and National Institute of Informatics (Tokyo).

H. Jeff Kimble, is the William L. Valentine Professor and Professor of Physics at Caltech. His research is in quantum optics and is noted for groundbreaking experiments in physics including one of the first demonstrations of teleportation of a quantum state, quantum logic gate, and the development of the first single atom laser. According to Elizabeth Rogan, OSA CEO, "Jeff has led a revolution in modern physics through his pioneering research in the coherent control of the interactions of light and matter." Kimble's main research focus is in quantum information science and the quantum dynamics of open systems.

Andrew G. White FAA is an Australian scientist and is currently Professor of Physics and a Vice-Chancellor's Senior Research Fellow at the University of Queensland. He is also Director of the University of Queensland Quantum technology Laboratory; Deputy-Director of the ARC Centre for Engineered Quantum systems, and a Program Manager in the ARC Centre for Quantum Computer and Communication Technology..

Whispering-gallery waves, or whispering-gallery modes, are a type of wave that can travel around a concave surface. Originally discovered for sound waves in the whispering gallery of St Paul’s Cathedral, they can exist for light and for other waves, with important applications in nondestructive testing, lasing, cooling and sensing, as well as in astronomy.

Ortwin Hess is a German-born theoretical physicist at Imperial College London (UK), working in condensed matter optics. Bridging condensed matter theory and quantum optics he specialises in nanophotonics, plasmonics, metamaterials and semiconductor laser dynamics. Since the late 1980s he has been an author and coauthor of over 300 peer-reviewed articles, the most popular of which, called "'Trapped rainbow' storage of light in metamaterials", was cited more than 400 times. He pioneered active nanoplasmonics and metamaterials with quantum gain and in 2014 he introduced the "stopped-light lasing" principle as a novel route to cavity-free (nano-) lasing and localisation of amplified surface plasmon polaritons, giving him an h-index of 33.

Sandu Popescu British physicist

Sandu Popescu is a Romanian-British physicist working in the foundations of quantum mechanics and quantum information.

Integrated quantum photonics, uses photonic integrated circuits to control photonic quantum states for applications in quantum technologies. As such, integrated quantum photonics provides a promising approach to the miniaturisation and scaling up of optical quantum circuits. The major application of integrated quantum photonics is Quantum technology:, for example quantum computing, quantum communication, quantum simulation, quantum walks and quantum metrology.

Cloud-based quantum computing is the invocation of quantum emulators, simulators or processors through the cloud. Increasingly, cloud services are being looked on as the method for providing access to quantum processing. Quantum computers achieve their massive computing power by initiating quantum physics into processing power and when users are allowed access to these quantum-powered computers through the internet it is known as quantum computing within the cloud.

In quantum computing, quantum supremacy or quantum advantage is the goal of demonstrating that a programmable quantum device can solve a problem that no classical computer can solve in any feasible amount of time. Conceptually, quantum supremacy involves both the engineering task of building a powerful quantum computer and the computational-complexity-theoretic task of finding a problem that can be solved by that quantum computer and has a superpolynomial speedup over the best known or possible classical algorithm for that task. The term was coined by John Preskill in 2012, but the concept of a quantum computational advantage, specifically for simulating quantum systems, dates back to Yuri Manin's (1980) and Richard Feynman's (1981) proposals of quantum computing. Examples of proposals to demonstrate quantum supremacy include the boson sampling proposal of Aaronson and Arkhipov, D-Wave's specialized frustrated cluster loop problems, and sampling the output of random quantum circuits.

Julia Kempe French, German, and Israeli researcher in quantum computing

Julia Kempe is a French, German, and Israeli researcher in quantum computing. Kempe was born in East Berlin to a Russian family. She was educated in Austria, Australia, France, and the US. She is currently the Director of the Center for Data Science at NYU and Professor at the Courant Institute

Giacomo Mauro DAriano

Giacomo Mauro D'Ariano is an Italian quantum physicist. He is a professor of theoretical physics at the University of Pavia, where he is the leader of the QUIT group. He is a member of the Center of Photonic Communication and Computing at Northwestern University; a member of the Istituto Lombardo Accademia di Scienze e Lettere; and a member of the Foundational Questions Institute (FQXi).


  1. Barrow, John D.; Davies, Paul C. W.; Harper, Charles L. (2004). Science and ultimate reality: quantum theory, cosmology, and complexity. Cambridge University Press. p. 695. ISBN   978-0-521-83113-0.
  2. 1 2 "2010 OSA Awards" (PDF). Optics and Photonics News. June 2010. Archived from the original (PDF) on 12 June 2010. Retrieved 29 May 2010.
  3. "Bristol University Physics—Centre for Quantum Photonics—Academic Staff". University of Bristol. Archived from the original on 8 February 2010. Retrieved 29 May 2010.
  4. O'Brien, JL; Pryde, GJ; White, AG; Ralph, TC; Branning, D (2003). "Demonstration of an all-optical quantum controlled-NOT gate". Nature. 426 (6964): 264–267. arXiv: quant-ph/0403062 . Bibcode:2003Natur.426..264O. doi:10.1038/nature02054. PMID   14628045. S2CID   9883628.
  5. "QIPC Young Investigator Award 2009". QUROPE (Quantum Information Processing and Communication in Europe). Archived from the original on 16 September 2010. Retrieved 29 May 2010.
  6. "Double honour for Professor O'Brien". University of Bristol . Retrieved 29 May 2010.
  7. "2010 Moseley medal and prize". Institute of Physics. Retrieved 5 July 2010.