Quantum random walks without walking

Details Quantum random walks without walking Quantum random walks without walking

2008-08-30

arxiv.org/abs/0809.0034v3

K. Manouchehri and J. B. Wang, Phys. Rev. A 80, 060304(R) (2009)

Physics

Quantum Physics

12 manuscript pages, 3 figures

Scientific paper

10.1103/PhysRevA.80.060304

Quantum random walks have received much interest due to their non-intuitive dynamics, which may hold the key to a new generation of quantum algorithms. What remains a major challenge is a physical realization that is experimentally viable and not limited to special connectivity criteria. We present a scheme for walking on arbitrarily complex graphs, which can be realized using a variety of quantum systems such as a BEC trapped inside an optical lattice. This scheme is particularly elegant since the walker is not required to physically step between the nodes; only flipping coins is sufficient.

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