Finding cliques by quantum adiabatic evolution

2002
11 pages
Published in:
  • Quant.Inf.Comput. 2 (2002) 3, 181-191
  • Published: 2002

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Abstract: (Rinton Press)
Quantum adiabatic evolution provides a general technique for the solution of combinatorial search problems on quantum computers. We present the results of a numerical study of a particular application of quantum adiabatic evolution, the problem of finding the largest clique in a random graph. An n-vertex random graph has each edge included with probability 1/2, and a clique is a completely connected subgraph. There is no known classical algorithm that finds the largest clique in a random graph with high probability and runs in a time polynomial in n. For the small graphs we are able to investigate (n18n \le 18), the quantum algorithm appears to require only a quadratic run time.
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