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Applied Mechanics and Materials

Experimental Measurement of Quantum Entanglement and Quantum Information Remote Control

Z.G. Wang

Published Oct 1, 2010• 1 citation
Publisher

Abstract

Quantum entanglement is one of the distinctive features of quantum mechanics, which is an effective approach to realize quantum communication. This article introduces the fundamental principles of quantum entanglement and proposes an implementation plan for remote preparation and measurement of quantum information.
DOI
10.4028/www.scientific.net/amm.33.55

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Quantum entanglement enables measurement on one party to affect the other’s state. Based on this peculiar feature, we propose a model of remote-controlled quantum computing and design an optical scheme to realize this model for a single qubit. As an experimental demonstration of this scheme, we further implement three Pauli operators, Hardmard gate, phase gate, and π / 8 gate. The minimal fidelity obtained by quantum process tomography reaches 82%. Besides, as a potential application, our model contributes to secure remote quantum information processing.
Quantum entanglement, a fundamental phenomenon in quantum mechanics, offers a unique pathway toward secure and efficient quantum information transfer. This paper explores the design and implementation of a novel quantum entanglement-based measurement protocol, termed the "Quantum Entanglement-Based Measurement Protocol" (QEBMP), aimed at achieving high accuracy and low latency in quantum information transmission. The core of the protocol hinges on leveraging entanglement to detect minuscule changes in quantum states, offering a distinct advantage over classical communication methods. We detail the protocol's architecture, highlighting the critical role of entanglement-induced correlations in enabling precise measurement and detection. The research focuses on establishing a robust and efficient mechanism for quantifying and interpreting entanglement fluctuations, contributing to the advancement of quantum technologies.
Abstract One of the most surprising consequences of quantum mechanics is the entanglement of two or more distance particles. The “ghost” interference and the “ghost” image experiments demonstrated the astonishing nonlocal behavior of an entangled photon pair. Even though we still have questions in regard to fundamental issues of the entangled quantum systems, quantum entanglement has started to play important roles in quantum information and quantum computation. Quantum teleportation is one of the hot topics. We have demonstrated a quantum teleportation experiment recently. The experimental results proved the working principle of irreversibly teleporting an unknown arbitrary quantum state from one system to another distant system by disassembling into and then later reconstructing from purely classical information and nonclassical EPR correlations. The distinct feature of this experiment is that the complete set of Bell states can be distinguished in the Bell state measurement. Teleportation of a quantum state can thus occur with certainty in principle.
Quantum entanglement is one of the most distinctive features of quantum mechanics. Whentwo quantum systems are prepared in an entangled state, measurements performed at spatiallyseparated locations can exhibit correlations that cannot be explained by assigning independentclassical states to the two systems.Standard quantum mechanics describes these correlations through a non-separable jointquantum state. Importantly, quantum entanglement does not permit controllable faster-thanlight communication: the statistics observed by one observer cannot be manipulated to transmitinformation instantaneously to another observer.
Quantum teleportation represents a groundbreaking technique in quantum information science that allows for the transfer of quantum states between distant parties without physically transmitting the particle itself. This phenomenon relies heavily on quantum entanglement, where the states of two particles become correlated in such a way that the state of one can be immediately known by measuring the other. This article explores the role of entangled states in quantum teleportation, explaining their fundamental importance, the mechanisms of their creation, and the practical implications for future quantum communication systems. Furthermore, it examines the theoretical models and experimental implementations that demonstrate the viability of quantum teleportation.
Quantum communication plays a key role in the next generation of information transfer and security schemes, by using quantum entanglement and measurements from quantum mechanics. We introduce the mathematical and physical foundations of quantum communication, such as the CNOT gate and Kronecker product. Then we propose two quantum communication protocols, namely dense coding and stealth coding. These protocols offer unique advantages that are theoretically unbreakable. Then we extend the protocols to the quantum communication protocol allowing for third-party supervision to ensure information security. Based on this, a communication protocol involving four parties is designed, enabling them to exchange information while being supervised.