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Published March 16, 2007 | Published
Journal Article Open

Quantum Computational Complexity of the N-Representability Problem: QMA Complete

Abstract

We study the computational complexity of the N-representability problem in quantum chemistry. We show that this problem is quantum Merlin-Arthur complete, which is the quantum generalization of nondeterministic polynomial time complete. Our proof uses a simple mapping from spin systems to fermionic systems, as well as a convex optimization technique that reduces the problem of finding ground states to N representability.

Additional Information

© 2007 The American Physical Society. (Received 17 September 2006; published 16 March 2007) Y.K.L. and M.C. thank the Institute for Quantum Information for its hospitality. Y.K.L. is supported by ARO/DTO QuaCGR. M.C. acknowledges support from EPSRC and Magdalene College, Cambridge, and is supported by the EU under the FP6-FET Integrated Project SCALA, No. CT-015714. F.V. is supported by the Gordon and Betty Moore Foundation through Caltech's Center for the Physics of Information, and by the NSF under Grant No. PHY-0456720.

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August 22, 2023
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