Generic quantum walk using a coin-embedded shift operator

Details Generic quantum walk using a coin-embedded shift operator Generic quantum walk using a coin-embedded shift operator

2008-10-09

arxiv.org/abs/0810.1556v2

Phys. Rev. A, 78, 052309 (2008)

Physics

Quantum Physics

5 pages, 1 figure, Published

Scientific paper

10.1103/PhysRevA.78.052309

The study of quantum walk processes has been widely divided into two standard variants, the discrete-time quantum walk (DTQW) and the continuous-time quantum walk (CTQW). The connection between the two variants has been established by considering the limiting value of the coin operation parameter in the DTQW, and the coin degree of freedom was shown to be unnecessary [26]. But the coin degree of freedom is an additional resource which can be exploited to control the dynamics of the QW process. In this paper we present a generic quantum walk model using a quantum coin-embedded unitary shift operation $U_{C}$. The standard version of the DTQW and the CTQW can be conveniently retrieved from this generic model, retaining the features of the coin degree of freedom in both variants.

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