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Quantum Computing and Quantum Cryptography
Published in T. Ananth Kumar, T. S. Arun Samuel, R. Dinesh Jackson Samuel, M. Niranjanamurthy, Privacy and Security Challenges in Cloud Computing, 2022
B. Sheik Mohamed, M. Satheesh Kumar, K.G. Srinivasagan
When we’re talking about the two methods of quantum communication, we have the teleportation method as illustrated in Figure 9.7. Instead of being based on classical communication, quantum computing uses qubits that are capable of being in a range of orthogonal superposition states, and these qubits are also capable of being in the entangled state. The main idea behind quantum teleportation is to build a quantum channel by employing the maximal entangled state of two particles. This occurs when the message is conveyed via a quantum operation [44]. It is important to remember that the different communication channels used (teleportation vs. direct conversation) are the only difference between the two options. A visual illustration of the quantum teleportation model is shown in Figure 9.7.
Quantum Field Propagation
Published in Indrakshi Dey, Propagation Modeling for Wireless Communications, 2022
In summary, Alice makes the von Neumann measurement in the Bell basis to obtain one of the possible d2 results. She conveys the results of her measurement to Bob by sending 2log2d classical bits of information. After receiving this information, Bob uses appropriate unitary operator Uvw on his qudit to convert its state to that of the input state, thereby completing the standard teleportation of a qudit |ψ〉α of arbitrary state over quantum channels. Though quantum teleportation with the aid of quantum entanglement looks promising, it is a very fragile resource and is easily degraded by noise, resulting in loss of teleported information. However, the situation can be ameliorated by exploiting quantum superposition of different causal orders realized through a quantum switch.
Quantum blockchain
Published in Muhammad Arif, Guojun Wang, Mazin Abed Mohammed, Md Tabrez Nafis, Vehicular Ad Hoc Networks, 2023
Quantum teleportation: It is a process to transfer the unknown quantum data to the distant light quantum, with which exists the entanglement performance using quantum entanglement features. However, the physical carrier that originally carried the quantum data is left in place without being transferred [20].
Rome teleportation experiment analysed in the Wigner representation: the role of the zeropoint fluctuations in complete one-photon polarization-momentum Bell-state analysis
Published in Journal of Modern Optics, 2018
A. Casado, S. Guerra, J. Plácido
Since the beginning of the quantum information theory, the possibility of transferring an unknown quantum state by using the fundamental properties of quantum mechanics has represented one of the most important goals to achieve (1). Quantum teleportation is based on two distinctive features of quantum mechanics: entanglement and the projection postulate. These properties, along with the classical communication channel between Alice (the sender) and Bob (the receiver), allows for the possibility of performing teleportation. Nowadays, teleportation constitutes an essential piece for the development of quantum computing and quantum communication (2–5). Similar to quantum teleportation is remote state preparation, in which Alice has complete classical knowledge of the state she wants to transmit. This distinction implies that remote state preparation reveals a non-trivial trade-off between entanglement and classical communication (6–8).
Stabilized magnetic spin dimer entanglement using a genetic algorithm
Published in Journal of Modern Optics, 2022
The quantum entanglement phenomenon is observed experimentally and mathematically as two or more quantum systems sharing the same wave function such that when measuring one system, the other system is affected instantaneously regardless of the distance. Quantum entanglement has been demonstrated to exist between quantum systems even at very large separations, for instance, distances such as between a satellite and the surface of earth [1]. Quantum entanglement is important to implement applications of quantum teleportation, quantum cryptography and quantum computation. Finding new ways to maximize and maintain the entanglement between two quantum systems is an active research area [2–4].