Cited by 472Quantum Computing Algorithms and ArchitectureQuantum many-body systemsComplexity and Algorithms in Graphs

Simulating Quantum Computation by Contracting Tensor Networks

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Markov, Igor L., Shi, Yaoyun·2008·SIAM Journal on Computing

Abstract

The treewidth of a graph is a useful combinatorial measure of how close the graph is to a tree. We prove that a quantum circuit with T gates whose underlying graph has a treewidth d can be simulated deterministically in $T^{O(1)}\exp[O(d)]$ time, which, in particular, is polynomial in T if $d=O(\log T)$. Among many implications, we show efficient simulations for log-depth circuits whose gates apply to nearby qubits only, a natural constraint satisfied by most physical implementations. We also show that one-way quantum computation of Raussendorf and Briegel (Phys. Rev. Lett., 86 (2001), pp. 5188–5191), a universal quantum computation scheme with promising physical implementations, can be efficiently simulated by a randomized algorithm if its quantum resource is derived from a small-treewidth graph with a constant maximum degree. (The requirement on the maximum degree was removed in [I. L. Markov and Y. Shi, preprint:quant-ph/0511069].)

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  • For the majority of states identified as not universal, efficient classical simulation is possible; specifically, the outcome probabilities of any sequence of single-qubit measurements can be efficiently and exactly computed.

    “For example, for the majority of states which have been identified above as not being universal, one has shown that efficient classical simulation is possible. More precisely, for such states it is possible to efficiently and exactly compute the outcome probabilities of any sequence of single-qubit measurements.”

    From Measurement-based quantum computation (2009) · cites this paper as [88]

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  1. [20][20] I. L. Markov and Y. Shi. Simulating quantum computation by contracting tensor networks. Pre-print: quant-ph/0511069. - · arXiv

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Authors
Markov, I. L., & Shi, Y.
Affiliations
University of Michigan (US)
Venue
SIAM Journal on Computing
Published
2008-01
Volume
38
Issue
3
Pages
963-981
ISSN
  • 0097-5397 (ISSN-L)
  • 1095-7111
OpenAlex
W2072969317
Cited by
472
References
43
Citations by year
2026: 29 · 2025: 54 · 2024: 46 · 2023: 72 · 2022: 42 · 2021: 43 · 2020: 42 · 2019: 26 · 2018: 19 · 2017: 13 · 2016: 18 · 2015: 11 · 2014: 9 · 2013: 7 · 2012: 7
FWCI
14.27
Type
journal article
Language
en
Open access
Locations
  • SIAM Journal on Computing (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • CERN Document Server (European Organization for Nuclear Research) (submittedVersion)
  • arXiv (Cornell University)
Funders
  • National Science Foundation (0323555, 0347078, 0622033, 0208959)
  • Defense Advanced Research Projects Agency
Topics
  • Physical Sciences › Computer Science › Artificial Intelligence › Quantum Computing Algorithms and Architecture
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum many-body systems
  • Physical Sciences › Computer Science › Computational Theory and Mathematics › Complexity and Algorithms in Graphs
Keywords
quantum circuit simulation, tensor networks, treewidth, one-way quantum computation, randomized algorithms, deterministic simulation

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