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arXiv · 1601.08204

Quantum Walks with Dynamical Control: Graph Engineering, Initial State Preparation and State Transfer

Thomas Nitsche·Fabian Elster·Jaroslav Novotný·Aurél Gábris·Igor Jex·Sonja Barkhofen·Christine Silberhorn
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Abstract

Quantum walks are a well-established model for the study of coherent transport phenomena and provide a universal platform in quantum information theory. Dynamically influencing the walker's evolution gives a high degree of flexibility for studying various applications. Here, we present time-multiplexed finite quantum walks of variable size, the preparation of non-localized input states and their dynamical evolution. As a further application, we implement a state transfer scheme for an arbitrary input state to two different output modes. The presented experiments rely on the full dynamical control of a time-multiplexed quantum walk, which includes adjustable coin operation as well as the possibility to flexibly configure the underlying graph structures.

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Thomas Nitsche, Fabian Elster, Jaroslav Novotný, Aurél Gábris, Igor Jex, Sonja Barkhofen, Christine Silberhorn. 2016-06-21. Quantum Walks with Dynamical Control: Graph Engineering, Initial State Preparation and State Transfer. https://doi.org/10.1088/1367-2630%2F18%2F6%2F063017

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