Multi-qubit correction for quantum annealers

@article{Ayanzadeh2021MultiqubitCF,
  title={Multi-qubit correction for quantum annealers},
  author={Ramin Ayanzadeh and John E. Dorband and Milton Halem and Timothy W. Finin},
  journal={Scientific Reports},
  year={2021},
  volume={11}
}
We present multi-qubit correction (MQC) as a novel postprocessing method for quantum annealers that views the evolution in an open-system as a Gibbs sampler and reduces a set of excited states to a new synthetic state with lower energy value. After sampling from the ground state of a given (Ising) Hamiltonian, MQC compares pairs of excited states to recognize virtual tunnels—i.e., a group of qubits that changing their states simultaneously can result in a new state with lower energy value—and… 
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