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Complexity of commuting Hamiltonians on a square lattice of qubits

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arxiv 1105.2843 v2 pith:CIFQYHQB submitted 2011-05-13 quant-ph

Complexity of commuting Hamiltonians on a square lattice of qubits

classification quant-ph
keywords commutingcomplexityhamiltonianscertificateclassicalgroundlatticequbits
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We consider the computational complexity of Hamiltonians which are sums of commuting terms acting on plaquettes in a square lattice of qubits, and we show that deciding whether the ground state minimizes the energy of each local term individually is in the complexity class NP. That is, if the ground states has this property, this can be proven using a classical certificate which can be efficiently verified on a classical computer. Different to previous results on commuting Hamiltonians, our certificate proves the existence of such a state without giving instructions on how to prepare it.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. The Complexity of Local Stoquastic Hamiltonians on 2D Lattices

    quant-ph 2025-02 unverdicted novelty 5.0

    The 2-local stoquastic Hamiltonian problem on 2D square qubit lattices is StoqMA-complete.