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Efficient algorithm for a quantum analogue of 2-SAT

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arxiv quant-ph/0602108 v1 pith:IGKHLIC2 submitted 2006-02-14 quant-ph

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keywords quantumalgorithmanalogueclassicalcomplexityk-satproblembesides
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Complexity of a quantum analogue of the satisfiability problem is studied. Quantum k-SAT is a problem of verifying whether there exists n-qubit pure state such that its k-qubit reduced density matrices have support on prescribed subspaces. We present a classical algorithm solving quantum 2-SAT in a polynomial time. It generalizes the well-known algorithm for the classical 2-SAT. Besides, we show that for any k>=4 quantum k-SAT is complete in the complexity class QMA with one-sided error.

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Cited by 4 Pith papers

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

  1. Quantum SAT Problems with Finite Sets of Projectors are Complete for a Plethora of Classes

    quant-ph 2025-06 conditional novelty 8.0 of 10

    New QSAT variants on qubits and qudits are complete for BQP_1, coRP, QCMA and six PI/SoPU classes, implying any classification of strong quantum CSPs must contain at least 13 classes unless some collapse.

  2. A Slice-Rank Drift Bound for Random Quantum \(k\)-SAT

    quant-ph 2026-07 accept novelty 7.0 of 10

    Random quantum k-SAT is unsatisfiable above density α⋆(k)∼2^k/k, improving the prior O(2^k) upper bound by a factor of order k, with α⋆(3)≈1.947.

  3. State Engineering of Unsteerable Hamiltonians

    quant-ph 2025-05 conditional novelty 7.0 of 10

    Frustrated local Hamiltonians can sometimes be steered into their ground-state manifold via discrete local measurement steps, and when they cannot, local steering is bounded by a 'glass floor' set by the smallest eige...

  4. Heisenberg limited quantum algorithm for estimating the fidelity susceptibility

    quant-ph 2025-09 conditional novelty 6.0 of 10

    A quantum algorithm estimates fidelity susceptibility in O~(1/epsilon) queries using a resolvent reformulation, achieving Heisenberg-limited precision.

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