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Title: Local Measure of Quantum Effects in Quantum Dynamics
Authors:
;
Award ID(s):
1955768
Publication Date:
NSF-PAR ID:
10325350
Journal Name:
The Journal of Physical Chemistry A
Volume:
125
Issue:
21
Page Range or eLocation-ID:
4653 to 4667
ISSN:
1089-5639
Sponsoring Org:
National Science Foundation
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  1. Quantum networks are complex systems formed by the interaction among quantum processors through quantum channels. Analogous to classical computer networks, quantum networks allow for the distribution of quantum computation among quantum computers. In this work, we describe a quantum walk protocol to perform distributed quantum computing in a quantum network. The protocol uses a quantum walk as a quantum control signal to perform distributed quantum operations. We consider a generalization of the discrete-time coined quantum walk model that accounts for the interaction between a quantum walker system in the network graph with quantum registers inside the network nodes. The protocol logically captures distributed quantum computing, abstracting hardware implementation and the transmission of quantum information through channels. Control signal transmission is mapped to the propagation of the walker system across the network, while interactions between the control layer and the quantum registers are embedded into the application of coin operators. We demonstrate how to use the quantum walker system to perform a distributed CNOT operation, which shows the universality of the protocol for distributed quantum computing. Furthermore, we apply the protocol to the task of entanglement distribution in a quantum network.