Group Members
David P. Di Vincenzo (Manager)David Di Vincenzo received his Ph.D. (1983), M.S.E. (1980) and B.S.E. (1979) from the University of Pennsylvania. Since 1985, David has been a Research Staff Member in the Physical Sciences Department here at IBM Research. He has worked throughout his career in various problems in condensed matter physics.
Since 1993, he has explored quantum information theory, and the physical realizations of quantum computers. In particular, he is known for proposing a set of five criteria (commonly called DiVincenzo's checklist) for the physical implementation of quantum computers. He is a Fellow of the American Physical Society, the Editor-in-Chief of the Virtual Journal of Quantum Information, and the Manager of the Physics of Information group at IBM Research in Yorktown, NY.
David Di Vincenzo: 
(914)945-3076:
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(914)945-2363:
Panagiotis D. Aliferis
Panos obtained a Ph.D. in physics at Caltech, where he was in the Institute for Quantum Information, and in John Preskill's group. Prior to this, he obtained a M.S. in Electrical Engineering at the University of Michigan in Ann Arbor, and a B.S. in Electrical Engineering and Computer Science at the NTUA in Athens. He dreams of quantum computers that operate fault-tolerantly and error-correct themselves.
Panagiotis D. Aliferis: 
914-945-2260:
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Charles H. Bennett
Charles H. Bennett received his PhD from Harvard in 1971 for molecular dynamics studies (computer simulation of molecular motion) under David Turnbull and Berni Alder. He came to IBM Reseach in 1972 and has worked on various aspects of the relation between physics and information. In 1973, building on the work of IBM's Rolf Landauer, he showed that general-purpose computation can be performed by a logically and thermodynamically reversible apparatus, which can operate with arbitrarily little energy dissipation per step because it avoids throwing away information about past logical states; and in 1982 he proposed a reinterpretation of Maxwell's demon. In collaboration with Gilles Brassard of the University of Montreal he developed a practical system of quantum cryptography ... and with the help of John Smolin built a working demonstration of it in 1989.
Other research interests include algorithmic information theory. In 1983-5 as visiting professor of computer science at Boston University, he taught courses on cryptography and the physics of computation.
In 1993 Bennett and Brassard, in collaboration with Claude Crepeau, Richard Jozsa, Asher Peres, and William Wootters, discovered "quantum teleportation,". In 1995-7, working with Smolin, Wootters, IBM's David DiVincenzo, and other collaborators, he helped found the quantitative theory of entanglement and introduced several techniques for faithful transmission of classical and quantum information through noisy channels.
He is an IBM Fellow, a Fellow of the American Physical Society, and a member of the National Academy of Sciences. [Source]
Charles H. Bennett:
(914)945-3118:
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Chris Blumer
Administrative Assistant
Chris Blumer: 
(914)945-3669
Sergey Bravyi
Sergey Bravyi received his PhD from Landau Institute for Theoretical Physics in 2003. He was a postdoc in John Preskill's group at Caltech (2003-2005) and at IBM Watson Research Center (2005-2006). His postdoctoral research was focused on fault-tolerant quantum computation with anyons in the Fractional Quantum Hall Effect settings. He also worked on extending the quantum information theory to fermionic systems and characterization of multi-partite entangled states. In January 2007 Sergey joined IBM Watson Research Center as a Research Staff Member. He is particularly interested in computational complexity and efficient algorithms for simulation of quantum many-body systems.
Sergey Bravyi: 
(914)945-1580
Frederico B. Brito
Fred obtained his Ph. D. (2006) in physics at UNICAMP, Brazil, for studies in decoherence processes in condensed matter qubits, where he was in the Condensed Matter Group, and had the supervision of Prof. Amir O. Caldeira. Since then, he has been interested in describing the dynamics of superconducting qubits.
Frederico B. Brito: 
(914)945-1775
Gregory J. Chaitin
Beginning in the late 1960s, Gregory Chaitin made contributions to algorithmic information theory and metamathematics, in particular a new incompleteness theorem similar in spirit to Gödel's incompleteness theorem. He attended the Bronx High School of Science and City College of New York, where he first developed his theorem while still in his teens.
Gregory has defined Chaitin's constant Ω, a real number whose digits are equidistributed and which is sometimes informally described as an expression of the probability that a random program will halt. Chaitin's early work on algorithmic information theory paralleled the earlier work of Kolmogorov.
Gregory also writes about philosophy, especially metaphysics and philosophy of mathematics . In recent writings, he defends a position known as digital philosophy. In the epistemology of mathematics, he claims that his findings in mathematical logic and algorithmic information theory show there are “mathematical facts that are true for no reason, they're true by accident. They are random mathematical facts”. Gregory is also the originator of using graph coloring to do register allocation in compiling, a process known as Chaitin's algorithm.
In 1995 he was given the degree of doctor of science honoris causa by the University of Maine. In 2002 he was given the title of honorary professor by the University of Buenos Aires in Argentina. Apart from being a research staff member at IBM', he is also a visiting professor at the Computer Science Department of the University of Auckland, and on the international committee of the Valparaíso Complex Systems Institute. [Source]
On November 15, 2007, IBM celebrated Gregory’s 60th birthday by sponsoring a 60th birthday symposium in his name. Happy Birthday !!!
Gregory J. Chaitin: 
(914)945-2785:
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Andrew W. Cross
Andrew Cross is a graduate student in the MIT EECS Department and work as a member of a group led by Prof. Isaac Chuang in the Research Laboratory of Electronics. He is at the IBM T. J. Watson Research Center for 2007. Most of his work has been related to fault-tolerant quantum computing. He maintains a set of software tools for analyzing fault-tolerant quantum circuits and have managed a 32 node cluster for carrying out Monte-Carlo simulations and counting fault paths. His recent and ongoing work is concerned with the structure of quantum codes and how this structure informs the design of a quantum computer's architecture.
Andrew W. Cross: 
(914)945-1375
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Mavis Donkor
Mavis Donkor obtained her B.S. in Physics in 2001 from Bethune-Cookman College and a Masters in Math ED from the City College of New York. In 2001 she came to IBM Research as a coop. From 2002 to 2006 she taught Mathematics and Physics in the New York City Public School System. Mavis is currently back at IBM doing research in physical authentication and random walks ... and enjoy designing and maintianing "this" website.
Mavis Donkor: 
(914)945-1780
Geoffrey M. Grinstein
Geoff Grinstein is a Research Staff Member in the Physical Sciences Department at IBM's Thomas J. Watson Research Center. He received a B.Sc. degree in physics from McGill University in 1970, and M.S. and Ph.D. degrees in physics from Harvard University in 1974. In 1979, following postdoctoral work at the University of Illinois at Urbana–Champaign and NORDITA in Copenhagen, he joined the Watson Research Center, where he has had a long, sordid history of working on the equilibrium and nonequilibrium statistical mechanics of different systems, including magnets, liquid crystals, superconductors, noisy nonequilibrium systems that exhibit generic multistability or coherent temporally-periodic oscillations, macroscopic quantum tunneling and coherence, micromagnetics, and switching and escape from metastable states in magnets and other ] systems.
Most recently, he has worked on DNA microarrays, collective phenomena in model neural and other networks, and power-law behavior and universality in models of queueing. He is a Fellow of the American Physical Society
Geoffrey M. Grinstein: 
(914)945-1604
Ralph Linsker
Within the fields of neuroscience and machine perception and learning, Ralph Linsker works on ways to discover structure automatically in complex sensory environments, and on relationships between neurobiology, signal processing, and information and control theory. He has pioneered in the use of information theory to devise novel principles for neural network learning and for understanding biological sensory processing.
Current and past professional service and recognition includes: Board of Regents, National Library of Medicine, NIH (appointed by Secretary of HHS); Technology Council (governing body) of the IBM Academy of Technology; Institute Director of the McDonnell Foundation Summer Institute in Cognitive Neuroscience; founding member of Executive Board of the journal Network: Computation in Neural Systems; Associate Editor of Cerebral Cortex, Journal of Cognitive Neuroscience, and Neural Networks; chair of an NSF working group on links between neural and physical sciences; Fellow, American Physical Society; and Fellow, American Society for Laser Medicine and Surgery.
He is the inventor of an ultraviolet laser catheter for clearing blood vessel blockages without thermal damage, and lead author of the first publication in the field of ultraviolet laser angioplasty. He has invented mathematical algorithms and hardware improvements for computer design that have been incorporated into IBM products. He holds 11 patents and has received two IBM Outstanding Innovation Awards.
Linsker received his Ph.D. in theoretical physics from Columbia, and his M.D. from Cornell.
Ralph Linsker: 
(914)945-1077
Graeme Smith
Graeme Smith is a postdoc working on quantum information theory. He spent 2006 at the University of Bristol. He was a graduate student in John Preskill's group at Caltech, and an undergraduate at the University of Toronto .
Graeme Smith: 
(914)945-2606
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(914)945-1767:
Barbara M. Terhal
Barbara M. Terhal earned a Propaedeutical degree in French language and literature in 1989 and a Propaedeutical degree in Physics in 1990 from the University of Amsterdam. In 1995 she earned a MSc in Theoretical Physics and a PhD in Physics from University of Amsterdam in 1999.
From December 1999 to 2001 she was at the IBM Watson Research Center as a Visiting Scientist and from January 2002 to August 2002 she was a Postdoctoral Scholar at Caltech. In September 2002 she joined IBM Watson Research Center as a Research Staff Member.
Barbara Terhal has been working in various sub-areas of quantum information theory, ranging from quantum entanglement to quantum cryptography and quantum algorithms. Her current active interests are in quantum complexity theory and quantum fault-tolerance. She is hopeful that a quantum computer will be built in her lifetime, but she worries that we may not know what to do with the behemoth beyond factoring, Groverizing and simulating physical systems. Sometimes she thinks that she should spend more time thinking about these problems or become an experimentalist herself, but reality usually comes between this thought and its actual implementation. She is a fellow of the American Physical Society and an associate editor of the journal `Quantum Information and Computation'.
Barbara M. Terhal: 
(914)945-2772:
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© Physics of Information Group at IBM Research, 2007
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