Simple loss-tolerant protocol for Greenberger-Horne-Zeilinger-state distribution in a quantum network
Hikaru Shimizu (Keio University)
Wojciech Roga (Keio University)
David Elkouss (TU Delft - Quantum Computer Science, Okinawa Institute of Science and Technology Graduate University, TU Delft - QuTech Advanced Research Centre)
Masahiro Takeoka (Keio University, National Institute of Information and Communications Technology (NICT))
More Info
expand_more
Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.
Abstract
Distributed quantum entanglement plays a crucial role in realizing networks that connect quantum devices. However, sharing entanglement between distant nodes by means of photons is a challenging process primary due to unavoidable losses in the linking channels. In this paper, we propose a simple loss-tolerant protocol for the Greenberger-Horne-Zeilinger-state distribution. We analyze the distribution rate under feasible experimental conditions and demonstrate the advantages of rate-loss scaling with respect to direct transmission. Our protocol does not use quantum repeaters and is achievable with current quantum optics technology. The result has direct application to tasks such as conference key agreement or distributed sensing. Moreover, it reduces the requirements for implementing distributed quantum error correction codes such as the surface code.