English

Quantum Approximate Optimization with Parallelizable Gates

Quantum Physics 2018-03-02 v2

Abstract

The quantum approximate optimization algorithm (QAOA) has been introduced as a heuristic digital quantum computing scheme to find approximate solutions of combinatorial problems with shallow circuits. We present a scheme to parallelize this approach for arbitrary all-to-all connected problem graphs in a layout of quantum bits (qubits) with nearest neighbor interactions. The protocol consisting of single qubit operations that encode the optimization problem and all interactions are problem-independent pair-wise CNOT gates among nearest neighbors. This allows for a parallelizable implementation in quantum devices with a square lattice geometry. The basis of this proposal is a lattice gauge model which also introduces additional parameters and protocols for QAOA to improve the efficiency.

Keywords

Cite

@article{arxiv.1802.01157,
  title  = {Quantum Approximate Optimization with Parallelizable Gates},
  author = {Wolfgang Lechner},
  journal= {arXiv preprint arXiv:1802.01157},
  year   = {2018}
}