**John Preskill**

**Richard P. Feynman Professor of Theoretical Physics**

**California Institute of Technology**

John Preskill is the Richard P. Feynman Professor of Theoretical Physics at the California Institute of Technology, and Director of the Institute for Quantum Information and Matter at Caltech.

Preskill received his A.B.
degree in physics in 1975 from

Until the mid-1990s, Preskill’s research focused on elementary particles, cosmology, and gravitation. He pointed out that superheavy magnetic monopoles should have been copiously produced in the very early universe, precipitating a crisis in theoretical cosmology that led to the inflationary universe proposal. With Mark Wise and Frank Wilczek, he explored the cosmological implications of the axion, a very light and weakly interacting hypothetical particle, and proposed that axions may comprise the cold dark matter of the universe. With Lawrence Krauss, he formulated the theory of local discrete symmetries, and with Sidney Coleman and Wilczek he developed the theory of quantum hair on black holes, which is classically invisible but has calculable quantum effects. With Hoi-Kwong Lo and others, he developed the theory of indistinguishable particles that obey non-abelian statistics.

Since the mid-1990s, Preskill research has focused on quantum computation and quantum information theory. With Peter Shor, he invented a powerful method, derived from entanglement theory, for proving the security of quantum protocols. With Daniel Gottesman and others, he developed the theory of fault-tolerant quantum computing and proved the quantum accuracy threshold theorem, which establishes that a noisy quantum computer can operate reliably if the noise is not too strong. With Alexei Kitaev and others, he showed that quantum information can be reliably stored and processed using methods based on topological principles, and that the quantum entanglement in topologically ordered quantum many-body systems has robust universal properties. With Patrick Hayden, he applied quantum information methods to gravitational physics, showing that information can be revealed by an evaporating black hole surprisingly quickly.

Preskill’s celebrated lecture
notes from his Caltech course on Quantum Computation, available online since
1997, have exerted a profound influence on the development of the subject. In
2000, Preskill founded Caltech’s Institute for Quantum Information, which since
then has been one of the world’s leading centers for theoretical research on
quantum information and quantum computing. In 2011, the IQI became part of the
Institute for Quantum Information and Matter, an

Preskill is a member of the National Academy of Sciences, a fellow of the
American Physical Society, and a two-time recipient of the Associated Students
of Caltech Teaching Award. He has been the Lorentz Chair at the University of
Leiden, the Rouse Ball Lecturer at the University of Cambridge, the Loeb Lecturer
at Harvard University, the Aisenstadt Chair at the
Centre de Recherches Mathématiques,
the Arnold Sommerfeld Lecturer at the University of
Munich, and the American Mathematical Society Josiah Willard Gibbs Lecturer. Preskill has mentored more than 50 Ph.D. students and more
than 45 postdoctoral scholars at Caltech, many of whom are now leaders in their
research areas.

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