Implementation of multi-walker quantum walks with cavity grid

Details Implementation of multi-walker quantum walks with cavity grid Implementation of multi-walker quantum walks with cavity grid

2012-03-27

arxiv.org/abs/1203.5962v1

Physics

Quantum Physics

7 pages, 3 figures

Scientific paper

We show how multi-walker quantum walks can be implemented in a quantum quincunx created via cavity quantum electrodynamics. The implementation of a quantum walk with a multi-walker opens up the interesting possibility to introduce entanglement and more advanced walks. With different coin tosses and initial states the multi-walker quantum walk shows different probability distributions which deviate strongly from the classical random walks with quadratic enhanced spreadings and localization effects. By introducing decoherence, the transition from quantum walks to the classical versions is observed. We introduce the average fidelity decay as a signature to investigate the decoherence-induced irreversibility of quantum walks.

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