Work

Topological networks for quantum communication between distant qubits

Year: 2017

Type: article

Abstract: Efficient communication between qubits relies on robust networks, which allow for fast and coherent transfer of quantum information. It seems natural to harvest the remarkable properties of systems characterized by topological invariants to perform this task. Here, we show that a linear network of coupled bosonic degrees of freedom, characterized by topological bands, can be employed for the efficient exchange of quantum information over large distances. Important features of our setup are that it is robust against quenched disorder, all relevant operations can be performed by global variations of parameters, and the time required for communication between distant qubits approaches linear scaling with their distance. We demonstrate that our concept can be extended to an ensemble of qubits embedded in a two-dimensional network to allow for communication between all of them.

Source: npj Quantum Information

DOI: 10.1038/s41534-017-0047-x

Authors: Nicolai Lang, Hans Peter Büchler

Institutions: University of Stuttgart, Center for Integrated Quantum Science and Technology

Language: English

Topic: Quantum Information and Cryptography

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $4,290

Funders: National Science Foundation, European Commission, H2020 European Research Council