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What are the potential applications of a round-trip multi-band quantum access network?

Time-division multiplexing

Quantum key distribution

Reinforcement learning

Wavelength-division multiplexing

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A round-trip multi-band quantum access network has the potential for various applications. It can support multi-user access and enable secure key sharing through continuous-variable quantum key distribution (CV-QKD) protocol . This network structure allows quantum states to travel in a circle, carrying information, and the multi-band technique enables different frequency bands to transmit key information for different users . The round-trip multi-band quantum access network can achieve excess noise suppression and secure key generation under standard fiber transmission . It is a cost-effective solution that can be expanded by plugging in simple modules, paving the way for large-scale quantum secure networks in the near future .

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Open access•Posted Content•DOI Multi-User Entanglement Distribution in Quantum Networks Using Multipath Routing 06 Mar 2023	The provided paper does not mention a round-trip multi-band quantum access network or its potential applications.
Open access•Posted Content•DOI Quantum Multi-Agent Actor-Critic Networks for Cooperative Mobile Access in Multi-UAV Systems 09 Feb 2023	The provided paper does not mention anything about a round-trip multi-band quantum access network.
Open access•Posted Content Multicore fiber-based quantum access network Chun Cai, Yongmei Sun, Jianing Niu, Peng Zhang, Yongrui Zhang, Yuefeng Ji - Show less +5 more 15 May 2019-arXiv: Quantum Physics 2 Citations	The provided paper does not mention anything about a round-trip multi-band quantum access network or its potential applications.
Open access•Posted Content•DOI A round-trip multi-band quantum access network 10 May 2023	The potential application of a round-trip multi-band quantum access network is multi-user secure key sharing through the continuous-variable QKD protocol.
Open access•Journal Article•DOI A quantum access network Bernd Fröhlich, James F. Dynes, Marco Lucamarini, Andrew W. Sharpe, Zhiliang Yuan, Andrew J. Shields - Show less +5 more 05 Sep 2013-Nature 269 Citations	The provided paper does not mention anything about a round-trip multi-band quantum access network.

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How does quantum communication with OAM work?5 answersQuantum communication with orbital angular momentum (OAM) enables higher capacity, increased security, and lower latency compared to traditional 2-dimensional systems or qubits. OAM-based quantum communication systems utilize the manipulation of OAM states of light to transmit quantum information. These systems can be supported by error correction coding schemes for higher-dimensional systems, such as qutrits, which are 3-dimensional quantum ternary digits. Theoretical evaluations have shown that OAM-based quantum communications can be constructed using controlled-NOT (CNOT) gates and qutrit stabilizers for error correction, allowing for the complete correction of single bit-flip errors. Additionally, OAM can be used to route quantum information between different nodes in complex quantum communication networks, including point-to-multipoint, fully-connected, and entanglement-distribution networks. These networks can be constructed with minimal resources, such as a single OAM sorter and multiple OAM values.

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