Lazy open quantum walks on a d-dimensional lattice converge to a Gaussian distribution, with an explicit covariance formula that matches a direct numerical simulation.
Limit theorems for open quantum random walks
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abstract
We consider the limit distributions of open quantum random walks on one-dimensional lattice space. We introduce a dual process to the original quantum walk process, which is quite similar to the relation of Schr\"odinger-Heisenberg representation in quantum mechanics. By this, we can compute the distribution of the open quantum random walks concretely for many examples and thereby we can also obtain the limit distributions of them. In particular, it is possible to get rid of the initial state when we consider the evolution of the walk, it appears only in the last step of the computation.
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Lazy Open Quantum Walks
Lazy open quantum walks on a d-dimensional lattice converge to a Gaussian distribution, with an explicit covariance formula that matches a direct numerical simulation.