Universal Computation by Multiparticle Quantum Walk

• Autores: David Gosset, Zak Webb
• Localización: Science, ISSN 0036-8075, Vol. 339, Nº 6121, 2013, págs. 791-794
• Idioma: inglés
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• Resumen

  • A quantum walk is a time-homogeneous quantum-mechanical process on a graph defined by analogy to classical random walk. The quantum walker is a particle that moves from a given vertex to adjacent vertices in quantum superposition. We consider a generalization to interacting systems with more than one walker, such as the Bose-Hubbard model and systems of fermions or distinguishable particles with nearest-neighbor interactions, and show that multiparticle quantum walk is capable of universal quantum computation. Our construction could, in principle, be used as an architecture for building a scalable quantum computer with no need for time-dependent control.