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Physical Review Letters

Quantum Superluminal Communications

M. Zak

Published Jan 1, 2000• 0 citations
OpenAlex

Abstract

Based upon quantum entanglement, a simple algorithm for instantaneous transmission of messages (chosen at random) to remote distances is proposed. A special class of situations when such transmissions are useful, is outlined. Quantum nonlocality arising from entasgled states is the most fundamental and the most mysterious phenomenon in quantum mechanics, and it is in the core of quantum information theory. Fomally quantum nonlocality follows from the SchrMinger equation; however, its physical meaning is still unclear despite successful experimental confirmation,"] and applications to teleportation, cryptography and computing[21. The most attractive aspect of quantum nonlocality is associated with instantaneous transmissions of messages. However, practical applications of this effect are restricted by the postulate adopted by many authors[31 that these messages cannot deliver any information. That is why all the quantum teleportation algorithms must include an adltional (classical) channel.[21. Returning to this postulate, we would like to emphasize that it is implied that the

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Based upon quantum entanglement, a simple algorithm for instantaneous transmission of messages (chosen at random) to remote distances is proposed. A special class of situations when such transmissions are useful, is outlined. Quantum nonlocality arising from entasgled states is the most fundamental and the most mysterious phenomenon in quantum mechanics, and it is in the core of quantum information theory. Fomally quantum nonlocality follows from the SchrMinger equation; however, its physical meaning is still unclear despite successful experimental confirmation,"] and applications to teleportation, cryptography and computing[21. The most attractive aspect of quantum nonlocality is associated with instantaneous transmissions of messages. However, practical applications of this effect are restricted by the postulate adopted by many authors[31 that these messages cannot deliver any information. That is why all the quantum teleportation algorithms must include an adltional (classical) channel.[21. Returning to this postulate, we would like to emphasize that it is implied that the
Based upon quantum-inspired entanglement in quantum-classical hybrids, a simple algorithm for instantaneous transmissions of non-intentional messages (chosen at random) to remote distances is proposed. The idea is to implement instantaneous transmission of conditional information on remote distances via a quantum-classical hybrid that preserves superposition of random solutions, while allowing one to measure its state variables using classical methods. Such a hybrid system reinforces the advantages, and minimizes the limitations, of both quantum and classical characteristics. Consider n observers, and assume that each of them gets a copy of the system and runs it separately. Although they run identical systems, the outcomes of even synchronized runs may be different because the solutions of these systems are random. However, the global constrain must be satisfied. Therefore, if the observer #1 (the sender) made a measurement of the acceleration v(sub 1) at t =T, then the receiver, by measuring the corresponding acceleration v(sub 1) at t =T, may get a wrong value because the accelerations are random, and only their ratios are deterministic. Obviously, the transmission of this knowledge is instantaneous as soon as the measurements have been performed. In addition to that, the distance between the observers is irrelevant because the x-coordinate does not enter the governing equations. However, the Shannon information transmitted is zero. None of the senders can control the outcomes of their measurements because they are random. The senders cannot transmit intentional messages. Nevertheless, based on the transmitted knowledge, they can coordinate their actions based on conditional information. If the observer #1 knows his own measurements, the measurements of the others can be fully determined. It is important to emphasize that the origin of entanglement of all the observers is the joint probability density that couples their actions. There is no centralized source, or a sender of the signal, because each receiver can become a sender as well. An observer receives a signal by performing certain measurements synchronized with the measurements of the others. This means that the signal is uniformly and simultaneously distributed over the observers in a decentralized way. The signals transmit no intentional information that would favor one agent over another. All the sequence of signals received by different observers are not only statistically equivalent, but are also point-by-point identical. It is important to assume that each agent knows that the other agent simultaneously receives the identical signals. The sequences of the signals are true random, so that no agent could predict the next step with the probability different from those described by the density. Under these quite general assumptions, the entangled observers-agents can perform non-trivial tasks that include transmission of conditional information from one agent to another, simple paradigm of cooperation, etc. The problem of behavior of intelligent agents correlated by identical random messages in a decentralized way has its own significance: it simulates evolutionary behavior of biological and social systems correlated only via simultaneous sensoring sequences of unexpected events.
This paper explores the potential of quantum entanglement for novel information encoding and transmission methods, moving beyond conventional quantum key distribution (QKD) and quantum channel approaches. The core claim is that leveraging the non-locality inherent in quantum entanglement allows for the theoretical possibility of superluminal information transfer and secure communication, circumventing the limitations imposed by classical physics. The proposed mechanism involves designing encoding schemes utilizing entangled photons or superconducting qubits, meticulously controlling the generation, transmission, and measurement of these entangled states to achieve quantum teleportation and, ultimately, information transfer. We present a fundamentally new approach by focusing directly on entanglement as the information carrier, rather than relying on intermediary protocols. This work lays the groundwork for a paradigm shift in information technology, potentially leading to transformative advancements in communication and computation. The primary focus is on the theoretical framework and potential encoding strategies, omitting experimental details.
Quantum mechanics allows a number of communications protocols that would not be possible classically, including provably-secure messages (quantum cryptography), increased channel capacity, and the ability to transmit an unknown quantum state (quantum teleportation). This tutorial will provide an introductory description of what appear to be the most promising applications of quantum communications, including quantum cryptography and quantum repeaters. The most commonly-used methods for quantum cryptography will be described, including the advantages and disadvantages of each in practical applications. The maximum range of current quantum cryptography systems is limited by the fact that optical amplifiers would destroy the quantum coherence of single photons and cannot be used in these kinds of systems. One potential solution to this problem is the transmission of single photons in free space, which would allow a global system for quantum cryptography based on a network of satellites and ground stations. Free-space quantum cryptography systems of that kind have now been demonstrated over relatively short distances. The range of quantum cryptography systems in optical fibers can also be extended using quantum repeaters that make use of entanglement purification and quantum teleportation. These same techniques could also be used to implement a “quantum Internet” for the transmission of qubits from one quantum computer to another. The practical challenges that will have to be met in order to implement quantum repeaters and quantum teleportation over large distances will be discussed.
The academic research into entanglement nicely illustrates the interplay between fundamental science and applications, and the need to foster both aspects to advance either one. For instance, the possibility to distribute entangled photons over tens or even hundreds of kilometers is fascinating because it confirms the quantum predictions over large distances, while quantum theory is often presented to apply to the very small (see Figure 1). On the other hand, entanglement enables quantum key distribution (QKD) [1]. This most advanced application of quantum information processing allows one to distribute cryptographic keys in a provably secure manner. For this, one merely has to measure the two halves of an entangled pair of photons. Surprisingly, and being of both fundamental and practical interest, the use of entanglement removes even the necessity for trusting most equipment used for the measurements [5]. Furthermore, entanglement serves as a resource for quantum teleportation (see Figure 2) [1]. In turn, this provides a tool for extending quantum key distribution to arbitrarily large distances and building large-scale networks that connect future quantum computers and atomic clocks [6]. In the following, we describe the counter-intuitive properties of entangled particles as well as a few recent experiments that address fundamental and applied aspects of quantum teleportation. While a lot of work is being done using different quantum systems, including trapped ions, color centers in diamond, quantum dots, and superconducting circuits, we will restrict ourselves to experiments involving photons due to their suitability for building future quantum networks.
Quantum state manipulation represents a significant challenge in quantum computing and communication. Current methods, often reliant on classical communication, restrict the ability to transmit information across distances. This paper proposes a novel approach to quantum state manipulation leveraging entanglement tunneling – a mechanism where quantum states instantaneously transfer across distances, circumventing the limitations of local interactions. We detail a "Entanglement Tunneling Protocol" – a meticulously designed algorithm – that demonstrates the potential for instantaneous communication and control over quantum states, fundamentally altering the landscape of information transfer. The paper explores the theoretical foundations, algorithmic implementation, and preliminary experimental validation of this groundbreaking technique. The core claim is that entanglement tunneling offers a pathway towards long-distance quantum communication and control, opening doors to unprecedented capabilities.
Abstract Entanglement is a random phenomenon that is instantly synchronized, regardless of the space that mediates between entangled particles. However, the instantaneous transmission of information using entanglement is impossible. This is because the instantaneity in the synchronization of non-local outcomes as a consequence of quantum measurement (after the distribution of the entangled pairs) cannot be used for an entanglement-based communication system to transmit information instantaneously. This impossibility stems from the following two reasons: a) the difficulty of controlling non-local outcomes through local actions without the intervention of an auxiliary channel (classical), and b) regardless of the previous point, no communication system based on entanglement can be instantaneous due to the distribution of an entangled pair at relativistic speeds, necessary to generate the quantum channel, each time a qubit must be transmitted. Three simple experiments help to clarify this controversial point. In fact, this study establishes what is truly responsible for the impossibility to transmit information instantaneously of any communication system based on entanglement. In this respect, functional models of the internal behavior of quantum measurement, and entanglement were developed, which allow analyzing the instantaneity post-distribution of entangled particles, before and after a quantum measurement, as well as the randomness in the results obtained from a quantum measurement of the entanglement. In this sense, this study establishes a debate about three possible responsible for the aforementioned randomness: the quantum measurement itself, entanglement, and the human intervention. Finally, homology between the entanglement and the double-slit experiment is presented.