In the field of Internet service evolution, classical and quantum paradigms are often seen as distinct and separate research areas. Typically, the classical Internet is perceived as a foundational communications infrastructure for the emerging quantum Internet, mainly providing essential services such as synchronization, signaling, control, and feedback. Current quantum Internet research requires a radical transformation of physical layer devices, often leading to the obsolescence of existing classical infrastructures. To address this challenge, in this work we introduce a new hybrid approach for the future development of the quantum Internet. Specifically, we will delve into various mechanisms and technologies that facilitate the integration of quantum networks with future 6G networks. Our goal is to develop a complete model for a hybrid quantum-classical Internet designed for future generation 6G in order to jointly and efficiently support both quantum and classical communications. In particular, we explore an innovative hybrid datalink layer architecture that is critical for effectively managing the diverse nature of quantum and classical data traffic and security. The main advantage of our model lies in the integration of new quantum hardware at the physical layer while leveraging existing advanced classical infrastructure. Our model is proposed as a step forward in the harmonization of quantum and classical Internet technologies, paving the way for a secure and fast future 6G architecture.
In the field of Internet service evolution, classical and quantum paradigms are often seen as distinct and separate research areas. Typically, the classical Internet is perceived as a foundational communications infrastructure for the emerging quantum Internet, mainly providing essential services such as synchronization, signaling, control, and feedback. Current quantum Internet research requires a radical transformation of physical layer devices, often leading to the obsolescence of existing classical infrastructures. To address this challenge, in this work we introduce a new hybrid approach for the future development of the quantum Internet. Specifically, we will delve into various mechanisms and technologies that facilitate the integration of quantum networks with future 6G networks. Our goal is to develop a complete model for a hybrid quantum-classical Internet designed for future generation 6G in order to jointly and efficiently support both quantum and classical communications. In particular, we explore an innovative hybrid datalink layer architecture that is critical for effectively managing the diverse nature of quantum and classical data traffic and security. The main advantage of our model lies in the integration of new quantum hardware at the physical layer while leveraging existing advanced classical infrastructure. Our model is proposed as a step forward in the harmonization of quantum and classical Internet technologies, paving the way for a secure and fast future 6G architecture.
As we move toward the rollout of 6G networks, we're stepping into an era of groundbreaking technological advancements. These next-generation networks promise ultra-low latency and seamless integration with artificial intelligence (AI) and the Internet of Things (IoT), unlocking a new level of connectivity and performance. However, with these powerful capabilities come significant security challenges. Traditional encryption methods may not be enough to protect the complex and highly sensitive data traveling through 6G networks. One of the most promising solutions lies in Quantum Communication, particularly Quantum Key Distribution (QKD)-a method that leverages the laws of quantum mechanics to enable highly secure encryption. This paper explores the emerging security risks in both terrestrial and satellite communication channels and reviews current research on integrating quantum communication into 6G infrastructure. Special attention is given to its potential within the metaverse, a rapidly evolving digital environment that demands robust and future-proof security frameworks. Key areas of focus include-Addressing security vulnerabilities in quantum communication, Enhancing infrastructure to support quantum technologies, Reducing error rates in quantum protocols. the paper aims to propose a flexible, forward-looking framework designed to ensure fast, secure communication for critical sectors such as finance, defense, and healthcare.
Abstract The quantum internet is a cutting‐edge paradigm that uses the unique characteristics of quantum technology to radically alter communication networks. This new network type is expected to collaborate with 6G networks, creating a synergy that will fundamentally alter how we communicate, engage, and trade information. The improved security, increased speed, and increased network capacity of the quantum internet will lead to the emergence of a broad variety of new applications and services. The current state of quantum technology and its integration with 6G networks are summarised in this study, with an emphasis on the key challenges and untapped possibilities. The main goal is to get knowledge about how the quantum internet might impact communication in the future and alter several economic and societal sectors.
As networks continue to evolve beyond 5 G, the Internet of Things (IoT) is expected to satisfy high demands for ultra-low latency, robust security, and resiliency in dynamic environments. Emerging technologies - particularly quantum technology - are a promising solution to address these challenges. This paper proposes a modular, hybrid quantum-classical architecture that seamlessly integrates quantum technologies such as secure quantum key sharing, quantum synchronization and quantum computing - into the existing IoT infrastructure. This approach supports compatibility with existing infrastructures while enabling next-generation capabilities. We explore the architectural principles of the IoT, leverage current standardization efforts, and illustrate practical use cases, including quantumassisted time synchronization and secure communication. With a focus on scalability and interoperability, the proposed framework provides a path towards quantum-enabled IoT networks. Such a hybrid quantum-classical regime forms the basis for a resilient quantum IoT infrastructure that is aligned with future networks requirements.
The emergence of sixth-generation (6 G) wireless networks and the rapid development of Quantum Internet infrastructure have created unprecedented demands for ultrasecure communication. Classical cryptographic techniques, which depend on computational hardness, are vulnerable to quantum attacks enabled by powerful quantum algorithms. Quantum cryptography, particularly Quantum Key Distribution (QKD), offers information-theoretic security based on the principles of quantum mechanics, making it a foundational element for future network security. This paper investigates the integration of quantum cryptography within 6 G architectures and Quantum Internet frameworks, focusing on secure key exchange, entanglementassisted communication, and quantum-safe protocols. We analyze the challenges posed by channel loss, quantum repeater limitations, hardware constraints, and large-scale deployment in ultra-dense 6 G environments. Our study highlights the potential of hybrid quantum-classical security models and outlines how quantum cryptography can support resilient, scalable, and next-generation secure communication systems.
Abstract Over the past four decades, quantum communication has evolved as a dynamic interdisciplinary field, advancing theoretical concepts and practical implementations. This article provides a concise overview focusing on recent progress in different aspects of secure quantum communication and quantum computation protocols, which can be applied to several real-world applications in quantum networks. These protocols guarantee unconditional security while enhancing communication rates and computation capabilities by harnessing quantum advantages. We also explore the role of non-terrestrial networks in quantum applications, with a focus on quantum technologies such as quantum key distribution and beyond, suitable for satellite-based applications. These technologies can contribute to future extensions of the quantum internet across intercontinental territories, connecting complex quantum network applications. Further, we delve into discussing the integration of quantum communication into 6G technology. The key innovation of this article lies in integrating quantum communication into 6G networks through a novel system-level simulation framework. 6G-enabled quantum networks are expected to meet the high demands on ubiquitous coverage, data rate, latency, and energy consumption. To address these issues, we design and evaluate four traffic demand scenarios using numerical simulation, illustrating how superdense coding doubles the data transmission rate and fulfills the high traffic demands on data rate, while under low traffic demand, entanglement resources can be reserved for future applications. Specifically, our investigation demonstrates how resource utilization adapts to different traffic demands, with adjustments based on available resources and practical constraints, evaluated over an ideal noise-free communication channel. The proof-of-work simulation is implemented using Python and is based on the system model we designed for varying traffic demands to pave the way for efficient quantum networks and gain deeper insights into their feasibility with available resources.
The standardisation of 5G is reaching its end, and the networks have started being deployed. Thus, 6G architecture is under study and design, to define the characteristics and the guidelines for its standardisation. In parallel, communications based on quantum‐mechanical principles, named quantum communications, are under design and standardisation, leading to the so‐called quantum internet. Nevertheless, these research and standardisation efforts are proceeding in parallel, without any significant interaction. Thus, it is essential to discuss an architecture and the possible protocol stack for classical‐quantum communication networks, allowing for an effective integration between quantum and classical networks. The main scope of this paper is to provide a joint architecture for quantum‐classical communication networks, considering the very recent advancements in the architectural design of 6G and the quantum internet, also defining guidelines and characteristics, which can be helpful for the ongoing standardisation efforts. For this purpose, the article discusses some of the existing main standardisation processes in classical communications and proposed protocol stacks for quantum communications. This aims at highlighting the potential points of connection and the differences that may imply future incompatible developments. The standardisation efforts on the quantum internet cannot overlook the experience gained and the existing standardisation, allowing the creation of frameworks in the classical communication context.