Quantum walk on the line as an interference phenomenon

Details Quantum walk on the line as an interference phenomenon Quantum walk on the line as an interference phenomenon

2003-04-30

arxiv.org/abs/quant-ph/0304201v2

Physical Review A 68, 020301 (2003)

Physics

Quantum Physics

8 pages, 2 figures; corrected following referees comments

Scientific paper

10.1103/PhysRevA.68.020301

We show that the coined quantum walk on a line can be understood as an interference phenomenon, can be classically implemented, and indeed already has been. The walk is essentially two independent walks associated with the different coin sides, coupled only at initiation. There is a simple analogy between the evolution of walker positions and the propagation of light in a dispersive optical fiber.

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