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<< Tuesday, June 18, 2013 >>

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Quantum algorithms for quantum field theories: Quantum Information and Computation Seminar

Seminar: Quantum Computing | June 18 | 2-3 p.m. | 290 Hearst Memorial Mining Building

Keith Lee, Institute for Quantum Computing, University of Waterloo

Berkeley Quantum Information & Computation Center

Quantum field theory provides the framework for the Standard Model of particle physics and plays a key role in many areas of physics. However, calculations are generally computationally complex and limited to weak interaction strengths. After an introduction to quantum field theory, I'll describe a polynomial-time quantum algorithm for computing relativistic scattering amplitudes in massive scalar quantum field theories. The algorithm applies at both weak and strong coupling, achieving exponential speedup over known classical methods at high precision or strong coupling. I'll then present the extension of this work to fermionic field theories. The study of such quantum algorithms probes important questions in computational complexity theory.