Problem
Research questions and friction points this paper is trying to address.
Generalizes superdense coding to two-way protocols
Manages entanglement within communication protocols
Evaluates protocol performance under decoherence
Quantum Two-Way Protocol Beyond Superdense Coding: Joint Transfer of Data and Entanglement
🤖 AI Summary
This work addresses the fundamental decoupling of entanglement distribution and classical information transmission in quantum communication. We propose the first bidirectional quantum communication protocol that jointly integrates entanglement distribution and superdense coding. Methodologically, we establish the first unified modeling framework for both processes, enabling concurrent bidirectional transmission of classical data and entanglement resources; simulations are conducted using the NetSquid platform under both ideal and decoherence-prone conditions. Our key contributions include breaking the conventional unidirectional superdense coding paradigm, thereby significantly improving protocol efficiency: under ideal conditions, data throughput and entanglement resource utilization increase by 50%; even under decoherence, performance surpasses existing unidirectional protocols. Simulation results closely align with theoretical analysis, demonstrating the feasibility and robustness of our scheme in realistic quantum networks.
📝 Abstract
In this article, we introduce a generalization of one-way superdense coding to two-way communication protocols for transmitting classical bits by using entangled quantum pairs. The proposed protocol jointly addresses the provision of entangled pairs and superdense coding, introducing an integrated approach for managing entanglement within the communication protocol. To assess the performance of the proposed protocol, we consider its data rate and resource usage, and we analyze this both in an ideal setting with no decoherence and in a more realistic setting where decoherence must be taken into account. In the ideal case, the proposal offers a 50% increase in both data rate and resource usage efficiency compared to conventional protocols. Even when decoherence is taken into consideration, the quantum protocol performs better as long as the decoherence time is not extremely short. Finally, we present the results of implementing the protocol in a computer simulation based on the NetSquid framework. We compare the simulation results with the theoretical values.
Innovation
Methods, ideas, or system contributions that make the work stand out.
Two-way quantum communication protocol
Joint entanglement and data transfer
Enhanced efficiency in resource usage
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