Quantum Conference Key Agreement with Photon Loss

• URL: http://arxiv.org/abs/2101.01483v2
• Date: Tue, 12 Jan 2021 15:27:41 GMT
• Title: Quantum Conference Key Agreement with Photon Loss
• Authors: Phattharaporn Singkanipa and Pieter Kok
• Abstract summary: Conference key agreement (CKA) is an information processing task where more than two parties want to share a common secret key. We present a loss-resilient protocol for CKA, based on redundant encoding and error correction.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Conference key agreement (CKA) is an information processing task where more than two parties want to share a common secret key. Here, we present a loss-resilient protocol for CKA, based on redundant encoding and error correction. Our protocol provides a speed-up in transmission rate over the existing lossy CKA protocol. However, encoding and error correction come with extra cost. We show that, using photon sources with creation probability p > 0.3, our protocol's secret key rate can overcome the existing protocol's. Hence, high probability entangled photon sources are required for realistic implementation of our loss-resilient protocol.

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