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Physica Scripta

An entanglement-encrypted quantum teleportation

Ying Wu, Yuanfeng Jin, Gang Lyu, Yang Liu

Published Jan 27, 2025• 2 citations
Publisher

Abstract

Abstract In this paper, a detailed analysis of basic quantum teleportation under standard basis measurement is presented, and a novel method for quantum teleportation is proposed. This method utilizes a physical channel, eliminating the need for direct information transmission. Additionally, a new quantum teleportation protocol is introduced by integrating this approach with existing teleportation techniques. The proposed protocol not only improves the security of quantum teleportation but also mitigates the effects of noise and decoherence.

DOI
10.1088/1402-4896/adaa37

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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.
This paper presents a novel protocol for secure distributed data transmission leveraging the principles of quantum teleportation. The core claim of this protocol is to achieve secure data transmission utilizing quantum teleportation technology. The proposed mechanism relies on quantum entanglement to facilitate the instantaneous transfer of quantum states and incorporates classical communication for error correction, thereby ensuring both the security and reliability of the transmission process. The significance of this work lies in its potential to provide a higher level of security compared to traditional data transmission methods. The protocol details the necessary steps, including entanglement distribution, state transfer, and classical communication phases, with a focus on minimizing the impact of noise and maintaining the integrity of the transmitted information. This protocol offers a viable pathway for building quantum networks capable of secure data exchange, contributing to advancements in quantum cryptography and distributed quantum computing.
This paper proposes a novel distributed data encryption scheme leveraging the principles of quantum teleportation. Traditional distributed data encryption methods often lack robust security measures, rendering them vulnerable to various attacks. This proposed system utilizes entangled states and quantum teleportation to securely transmit encryption keys between distributed nodes. Instead of directly transmitting sensitive data, the information is encoded and teleported, significantly enhancing the overall security of the data. The core claim of this work is that the use of quantum teleportation provides a more secure encryption mechanism compared to conventional approaches. The system's mechanism relies on establishing entanglement between nodes and employing teleportation protocols to facilitate key exchange. This approach avoids direct data transmission, a critical vulnerability in many existing schemes. The effectiveness of this method is demonstrated through a theoretical framework, highlighting its potential to address the security concerns present in current distributed data encryption technologies. The core mechanism is to utilize entanglement to securely transmit keys, and the novelty lies in the shift from direct data transmission to teleportation-based key exchange.
Abstract In this study, we propose an encrypted quantum teleportation broadcast scheme using a 6-qubit entangled channel and an encrypted quantum teleportation scheme with a controller via a 7-qubit entangled channel. The quantum state of Alice, to be transmitted, is first encrypted into two distinct states that satisfy certain conditions. As the main sender, Alice designates two agents to transmit encrypted states to two receivers. She shares a 6-qubit entangled state with each party and provides the receivers with a 1-bit classical information containing the chosen encryption. After the agents perform measurements on the corresponding orthogonal bases and send the results to the receivers, each receiver can reconstruct the original state sent by Alice. To enhance security for the receivers, the scheme introduces Alice as a controller. The receivers can reconstruct the original state only if Alice performs a measurement and shares her measurement outcome. The use of encryption ensures that even if an agent’s qubit is intercepted, the actual state remains secure. Alice, as the controller, can also terminate the transmission if a security threat is detected or she change her mind to finish the transmission. The teleportation performance depends on how the qubit is encrypted. For a specific input state used as an example, the protocol obtained a teleportation success probability of 0.9608.
This paper proposes a novel quantum networking protocol leveraging quantum teleportation for rapid quantum information transfer within a network. Traditional quantum network architectures suffer from limited transmission speeds due to the requirement of physically transporting qubits. This protocol overcomes this limitation by utilizing the quantum entanglement and Bell states to facilitate instantaneous information transfer, circumventing the need for direct qubit conveyance. The core of the protocol relies on establishing and maintaining entanglement between nodes, followed by a Bell state measurement and classical communication to reconstruct the quantum state at the destination. This design offers a significantly faster method for quantum information distribution compared to conventional approaches. The theoretical framework is presented with detailed mathematical formulations of the key steps, including the Bell state measurement, the process of quantum state transfer, and the necessary classical communication protocols. This work contributes to the advancement of quantum networking technology and provides a foundation for future high-speed quantum communication systems.
Abstract Quantum teleportation exemplifies how the transmission of quantum information starkly differs from that of classical information and serves as a key protocol for quantum communication and quantum computing. While an ideal teleportation protocol requires noiseless quantum channels to share a pure maximally entangled state, the reality is that shared entanglement is often severely degraded due to various decoherence mechanisms. Although the quantum noise induced by the decoherence is indeed a major obstacle to realizing a near-term quantum network or processor with a limited number of qubits, the methodologies considered thus far to address this issue are resource-intensive. Here, we demonstrate a protocol that allows optimal quantum teleportation via noisy quantum channels without additional qubit resources. By analyzing teleportation in the framework of generalized quantum measurement, we optimize the teleportation protocol for noisy quantum channels. In particular, we experimentally demonstrate that our protocol enables to teleport an unknown qubit even via a single copy of an entangled state under strong decoherence that would otherwise preclude any quantum operation. Our work provides a useful methodology for practically coping with decoherence with a limited number of qubits and paves the way for realizing noisy intermediate-scale quantum computing and quantum communication.