Abstract
We provide Ising formulations for many NP-complete and NP-hard problems,
including all of Karp's 21 NP-complete problems. This collects and extends
classic results relating partitioning problems to Ising spin glasses, as well
as work describing exact covering algorithms and satisfiability. In each case,
the state space is at most polynomial in the size of the problem, as is the
number of terms in the Hamiltonian. This work may be useful in designing
adiabatic quantum optimization algorithms.
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