Godsil, C and Severini, S (2010) Control by quantum dynamics on graphs. PHYS REV A , 81 (5) , Article 052316. 10.1103/PhysRevA.81.052316.
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Abstract
We address the study of controllability of a closed quantum system whose dynamical Lie algebra is generated by adjacency matrices of graphs. We characterize a large family of graphs that renders a system controllable. The key property is a graph-theoretic feature consisting of a particularly disordered cycle structure. Disregarding efficiency of control functions, but choosing subfamilies of sparse graphs, the results translate into continuous-time quantum walks for universal computation.
| Type: | Article |
|---|---|
| Title: | Control by quantum dynamics on graphs |
| DOI: | 10.1103/PhysRevA.81.052316 |
| Keywords: | ALGORITHMS, UNIVERSAL, WALKS |
| UCL classification: | UCL > School of BEAMS > Faculty of Engineering Science > Computer Science |
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