Apollaro, T.J.G.; Chetcuti, W.J. Two-Excitation Routing via Linear Quantum Channels. Entropy2021, 23, 51.
Apollaro, T.J.G.; Chetcuti, W.J. Two-Excitation Routing via Linear Quantum Channels. Entropy 2021, 23, 51.
Routing quantum information among different nodes in a network is a fundamental prerequisite for a quantum internet. While single-qubit routing has been largely addressed, many-qubit routing protocols have not been intensively investigated so far. Building on the many-excitation transfer protocol in Ref. , we apply the perturbative transfer scheme to a two-excitation routing protocol on a network where multiple two-receivers block are coupled to a linear chain. We address both the case of switchable and permanent couplings between the receivers and the chain. We find that the protocol allows for efficient two-excitation routing on a fermionic network, although for a spin-12 network only a limited region of the network is suitable for high-quality routing.
quantum state routing; many-body dynamics; quantum information, fermionic network
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