To celebrate the 25th anniversary of the seminal 1993 quantum teleportation paper, we are pleased to present research works, reviews, and stories about quantum communication, quantum entanglement, and quantum teleportation: (1) How was quantum teleportation invented? (2) Which teleportation experiments were performed at the Sapienza University in Rome? (3) Can we use joint measurements to generate nonclassical correlations? (4) How is classical sampling related to quantum entanglement? (5) How is classical communication related to a special quantum ensemble? (6) How can simplifying a quantum key distribution protocol make it insecure? (7) Can we teleport a two-qubit quantum state using a nonsymmetric channel? This book includes submissions by some of the most prominent quantum teleportation contributors, including Gilles Brassard, Francesco De Martini, Nicolas Gisin, and William K. Wootters, as well as additional researchers, all presenting their up-to-date insights regarding quantum communication.
To celebrate the 25th anniversary of the seminal 1993 quantum teleportation paper, we are pleased to present research works, reviews, and stories about quantum communication, quantum entanglement, and quantum teleportation: (1) How was quantum teleportation invented? (2) Which teleportation experiments were performed at the Sapienza University in Rome? (3) Can we use joint measurements to generate nonclassical correlations? (4) How is classical sampling related to quantum entanglement? (5) How is classical communication related to a special quantum ensemble? (6) How can simplifying a quantum key distribution protocol make it insecure? (7) Can we teleport a two-qubit quantum state using a nonsymmetric channel? This book includes submissions by some of the most prominent quantum teleportation contributors, including Gilles Brassard, Francesco De Martini, Nicolas Gisin, and William K. Wootters, as well as additional researchers, all presenting their up-to-date insights regarding quantum communication.
Abstract Chapter 14 discusses the quantum communication protocol called quantum teleportation, which uses the quantum correlations in an entangled particle pair shared between two observers to transmit the information stored in the (unknown) quantum state of a target system from one of the observers to the other. After reviewing the theoretical basics we showcase some of the important experimental demonstrations of teleportation. We then turn to more general protocols related to teleportation such as entanglement swapping, and the general formalism of isometries, before inspecting the option of delayed-choice entanglement swapping. In the light of these findings we compare teleportation to classical information transfer and inspect the related dense-coding protocol. Finally, we give an overview of basic quantum key distribution protocols is given, including the Bennett-Brassard-84 protocol based on conjugate coding and the entanglement-based Ekert-91 protocol
Quantum Information Processing (QIP) exploits the principles of quantum mechanics to perform information storage, communication, and computation in ways that are fundamentally impossible within classical frameworks. This article presents a pedagogical overview of the mathematical foundations of quantum information theory, including qubits, Hilbert spaces, linear operators, quantum measurements, tensor products, density operators, and quantum entanglement. Building upon these concepts, we provide a detailed introduction to quantum teleportation, one of the most remarkable protocols in quantum communication. The discussion covers the no cloning theorem, the original teleportation protocol by Bennett et al., experimental realisations of quantum teleportation, and extensions involving probabilistic and multiqubit teleportation schemes. Particular emphasis is placed on the role of entanglement as a communication resource, together with the study of teleportation channels based on bipartite and multipartite quantum states. Various quantitative measures of entanglement, including concurrence, negativity, entanglement of formation, and relative entropy of entanglement, are reviewed alongside teleportation fidelity as a performance metric. Furthermore, the interplay between Bell nonlocality, mixed state entanglement, and teleportation efficiency is examined, followed by a survey of advanced developments such as controlled teleportation, bidirectional teleportation, cluster state teleportation, and recent advances in the Quantum 2.0 era. This review aims to provide students, researchers, and engineers with a coherent introduction to the theoretical foundations and practical significance of quantum teleportation in emerging quantum technologies.
Quantum teleportation is one of the most striking consequence of quantum mechanics and is defined as the transmission and reconstruction of an unknown quantum state over arbitrary distances. This concept was introduced for the first time in 1993 by Charles Bennett and coworkers, it has then been experimentally demonstrated by several groups under different conditions of distance, amount of particles and even with feed forward. After 20 years from its first realization, this contribution reviews the experimental implementations realized at the Quantum Optics Group of the University of Rome La Sapienza.
Teleportation is a new and exciting field of future communication. Security in data communication is a major headache now a day. Among the encryption technologies that are available at present, shared key is the most reliable which depends on secure key generation and distribution. Teleportation/entanglement is a perfect solution in this regard as for the no cloning theorem of quantum mechanics any attempt to intercept the key by the eavesdropper will be detectable immediately. To use the quantum key distribution efficiently and effectively, rigorous study and research on teleportation/entanglement is needed. We have reviewed and presented teleportation concept, its process, road blocks, and successes that are achieved recently in a straightforward manner.
Quantum Key Distribution protocols have been essential for the purpose of creating secure channels for long-distance transmission of quantum information. On the basis of ideas of quantum teleportation, this paper presents a novel quantum communication protocol utilizing the quantum entanglement and classical communication channels. Also, this paper aims to increase key generation rate and distance, achieve longer communication distances and higher key production compared to traditional QKD methods, improve resilience against eavesdropping and optimize system performance. Quantum teleportation ensures the secure transfer of quantum states without exposing them to potential eavesdropping or interception, offering a higher level of security compared to traditional qubit-based protocols. This involves a thorough investigation of the Qiskit circuit implementations, operational procedures, and mathematical underpinnings of the protocol. Also, a thorough study of the protocol’s performance with respected to some of the existing protocols like BB84, E91 and others using various metrics like QBER, key generation rate, adversarial resilience and. This project advances Quantum Key Distribution systems and established the foundation for secure quantum communication networks.
Widely deployed public-key cryptography is vulnerable to sufficiently capable quantum computers, motivating post-quantum and quantum-cryptographic responses. This structured narrative review examines foundational theory and selected literature, drawing on a screening of 71 publications, of which 38 were retained and cited, principally from 2020 to 2025, to assess quantum teleportation within secure communication architectures. The analysis establishes that teleportation is an entanglement-assisted state-transfer primitive, not an autonomous source of security. It distinguishes conventional quantum key distribution (QKD) from teleportation-assisted QKD, separates entanglement swapping from payload teleportation, and compares teleportation-based quantum secure direct communication (QSDC) with repeater-supported networking. Recent experiments demonstrate capability expansion in high-dimensional states, logical code spaces, non-neighbouring network nodes, heterogeneous hardware interfaces, and coexistence with high-capacity classical fibre traffic. Deployment nevertheless remains constrained by loss, entanglement-generation rate, memory coherence, Bell-measurement efficiency, synchronisation, device trust, authentication, and cost. Teleportation can broaden quantum-network functionality, but confidentiality and authenticity depend on the complete protocol, threat model, verification procedures, and implementation assumptions