The quantum communications is a far distant theoretical concept that has been taken up in many developing nations, to practically actualize it in daily activities. This has its own caveat which cannot be left unhindered. Networking with optical communication and controlling entangled-photons are areas that needs to be bridged with the assistance of quantum mechanics and physics of information theory. A quantum network test bed with existing quantum devices in real life network environment is being studied at NIST since a decade. This work highlights a part of the network gateway, that can assist in communicating over long channels and geographies, considering the loss of information in terms of qubits on the go. This work presents a concept to enhance secure exchange of information, in a faulty channel, and attempts to make the communication resilient to loss of qubits, following existing architecture.
The quantum communications is a far distant theoretical concept that has been taken up in many developing nations, to practically actualize it in daily activities. This has its own caveat which cannot be left unhindered. Networking with optical communication and controlling entangled-photons are areas that needs to be bridged with the assistance of quantum mechanics and physics of information theory. A quantum network test bed with existing quantum devices in real life network environment is being studied at NIST since a decade. This work highlights a part of the network gateway, that can assist in communicating over long channels and geographies, considering the loss of information in terms of qubits on the go. This work presents a concept to enhance secure exchange of information, in a faulty channel, and attempts to make the communication resilient to loss of qubits, following existing architecture.
Quantum networks aim to facilitate the fault-tolerant and secure transmission of quantum states across distant devices. The widely adopted quantum teleportation scheme requires multiple rounds of entanglement swapping and purification, leading to significant resource overhead and operational complexity. In this study, we propose a novel fault-tolerant and secure quantum communication scheme based on uncorrectable error injection. Our method exploits a quantum state encoding scheme based on quantum error correction codes, which strategically introduces uncorrectable errors to enhance security. It eliminates the need for entanglement distribution while reducing resource requirements. The injected errors protect against eavesdropping by preventing unauthorized parties from retrieving meaningful information. Security analysis shows that as the data length and encoded message size increase, information leakage becomes negligible relative to the size of the total message. Comparative performance analysis with existing approaches indicates that our method reduces transmission overhead while maintaining comparable fidelity in low-error regimes. These findings suggest that the proposed method offers a scalable and practical alternative for secure long-distance quantum communication, distributed quantum computing, and future quantum internet applications.
Quantum communication is a novel communication approach for information transfer and this approach exhibits unparalleled security capability, making this approach a promising technology in various fields, including national security, finance industry and our daily life. In this article, we propose a gateway system for quantum communication phone user terminal extension. This gateway system provides viable solutions to various issues (connection of one quantum gateway to several quantum phones and program-controlled exchange) in the field of quantum communication network and assists in achieving communications between various phones via quantum gateway.
Quantum communication represents a revolutionary advancement over classical information theory, which leverages unique quantum mechanics properties like entanglement to achieve unprecedented capabilities in secure and efficient information transmission. Unlike bits in classical communication, quantum communication utilizes qubits in superposition states, allowing for novel information storage and processing. Entanglement, a key quantum phenomenon, enables advanced protocols with enhanced security and processing power. This paper provides a comprehensive overview of quantum communication, emphasizing the role of entanglement in theoretical foundations, practical protocols, experimental progress, and security implications. It contrasts quantum communications potential applications with classical networks, identifying areas where entanglement offers significant advantages. The paper explores the fundamentals of quantum mechanics in communication, the physical realization of quantum information, and the formation of secure quantum networks through entanglement-based strategies like Quantum Key Distribution (QKD) and teleportation. It addresses the challenges of long-distance quantum communication, the role of quantum repeaters in scaling networks, and the conceptualization of interconnected quantum networks. Additionally, it discusses strides towards the Quantum Internet, Quantum Error-Correcting codes, and quantum cryptographys role in ensuring secure communication. By highlighting the role of entanglement, this paper aims to inspire further research and innovation in secure and efficient information exchange within quantum networks.
This paper explores the potential of dynamic quantum circuits with fault tolerance in enhancing Internet of Things (IoT) gateways. By allowing real-time adaptability and incorporating robust error correction mechanisms, dynamic quantum circuits can significantly improve the security, efficiency, and reliability of IoT systems. The adaptability of these circuits enables them to respond to changing conditions and errors, making them well-suited for the complex and often unpredictable nature of IoT environments. However, the implementation of dynamic quantum circuits presents several challenges. These include the complexity of circuit design, the need to manage high error rates, increased resource requirements, and the integration of quantum systems with existing classical architectures. Additionally, developing effective real-time feedback mechanisms and ensuring robust security measures are critical for maintaining the integrity of these advanced systems. Despite these challenges, the potential benefits of dynamic quantum circuits in IoT applications are substantial. As research progresses and technology advances, overcoming these obstacles could lead to the realization of smarter, more resilient IoT environments that leverage the unique capabilities of quantum computing. This integration has the potential to drive innovation across various sectors, ultimately enhancing everyday life and transforming how we interact with technology.
Recent progress in quantum technologies has brought quantum communication and networking from a largely theoretical idea to an emerging practical reality. By exploiting fundamental quantum phenomena such as superposition and entanglement, quantum communication promises capabilities that are fundamentally different and out of reach for classical communication systems, particularly in terms of security and information sharing. This review aims to present the essential theoretical concepts required to understand quantum communication, alongside an experimental and engineering perspective that highlights how these ideas are realized using real hardware. We explain core principles and protocols in a manner that connects the physics to practical system design, allowing readers to see how quantum theory and communication technology jointly enable quantum networking. The paper further surveys recent experimental and technological advances that have made practical quantum communication possible, emphasizing the role of photonic hardware, sources, detectors, and integrated platforms in enabling key operations, now leading to deployment of multi-node long-distance quantum networks. Finally, we also present the current developments in quantum-secure communication and quantum networking efforts undergoing in India, placing them in the context of the global progress.
Present-day quantum communication predominantly depends on trusted relays (e.g., quantum repeaters, low-Earth-orbit satellite) connected by optical fiber cables to transmit information. However, recent evidence supports a decades-old concept that quantum entanglement, harnessed by current quantum communication systems, does not necessarily rely on a physical relay medium. In modern quantum communication networks, this trusted relay infrastructure is (1) susceptible to security attacks, (2) limited by the channel capacity, (3) subject to decoherence loss, and (4) expensive to set up. The instantaneous and faster-than-light activities of quantum entanglement occurring in quantum communication have suggested guidance by some non-locality nature. On the contrary, neither ground nor space-relays have shown or been demonstrated to embody it. It is proposed in this paper that the non-locality nature of quantum theory governs quantum entanglement; elementary particles, components of a universal quantum body, can achieve remote entanglement regardless of a physical medium or spatial proximity. Evidence and theory supporting remote entanglement in superconducting quantum systems (entanglement fidelities for communication in particular) are presented. One such particle, the photon, representing a basic unit of quantum information, qubit ∣ψ⟩=α∣0⟩+β∣1⟩, consists of real continuous values in complex numbers (α,β) with infinite precision. These values (α,β) can account for the distinctiveness of qubits and result in an identity QuID that possibly supports remote entanglement. New approaches to medium-free secure quantum communication are suggested by running simulations and actual quantum computations on a quantum circuit.