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Super Distance Communication with Quantum Entanglement

Kai Yuan

Published Jun 1, 2017• 0 citations
OpenAlex

Abstract

Super distance communication with quantum packet selection and grouping plus interval correction. The first step is to group the light quantum, 2 pairs of entangled quantum constitute a group,so the group include 4 light quantum. The second step will be compiled for each of the 3 groups of quantum,we call the 3 groups as a round. By observe a round(6 light quantems) we determine valid round and invalid round.By valid round and interval we could send or receive message.

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Super distance communication with quantum packet selection and grouping plus interval correction. The first step is to group the light quantum, 2 pairs of entangled quantum constitute a group,so the group include 4 light quantum. The second step will be compiled for each of the 3 groups of quantum,we call the 3 groups as a round. By observe a round(6 light quantems) we determine valid round and invalid round.By valid round and interval we could send or receive message.
Based on quantum entanglement and corresponding quantum communication, first we research a simple superluminal entangled communication scheme, whose key is to establish two mutually entangled particles or devices A and B. We observe and control the information of A position, then can know the corresponding results of the other B. This is not to send directly information each other. It may be superluminal. Next, in special relativity we provided that there are necessarily two symmetrical topological structures separated by the light-cone, which includes the generalized Lorentz transformation (GLT) for the spacelike interval, in which phase velocity is superluminal. This complete special relativity is base of this scheme, and should agree and test GLT. Further, it may be developed to the extensive special relativity, in which only
Based on quantum entanglement and corresponding quantum communication, we research a simple superluminal entangled communication scheme, whose key is to establish two mutually entangled particles or devices A and B. We observe and control the information of A position, then can know the corresponding results of the other B. This is not to send directly information each other. It may be superluminal. In special relativity we provided that there are necessary two symmetrical topological structures separated by the light-cone, which includes the generalized Lorentz transformation (GLT) for the spacelike interval, in which phase velocity is superluminal. It is base of this scheme, and may test GLT.
Quantum secure direct communication (QSDC) enables the message sender to directly transmit messages to the message receiver through quantum channel without keys. Environmental noise is the main obstacle for QSDC's practicality. For enhancing QSDC's noise robustness, we introduce the quantum error correction (QEC) code into QSDC and propose the QSDC protocol based on the redundancy code. This QSDC protocol correlates atomic state with the electron–photon entangled pairs and transmits photons in quantum channels for two rounds. The parties can construct the remote atomic logical entanglement channel and decode messages with the heralded photonic Bell state measurement (BSM) and single electron measurement. This QSDC protocol is unconditionally secure in theory and has some advantages. First, benefiting from the heralded photonic BSM, it can eliminate the influence from photon transmission loss and has the potential to realize long-distance secure message transmission. Second, taking use of the error correction function of the repetition code, the error rate caused by the decoherence during the second round of photon transmission can be reduced, which can reduce the message error and increase the secret message capacity. Third, the whole protocol is feasible under current experimental condition. Our QSDC protocol can be extended to use other stronger QEC code. It provides a promising method to promote QSDC's practicality in the future.
Entanglement is known to boost the efficiency of classical communication. In distributed computation, for instance, exploiting entanglement can reduce the number of communicated bits or increase the probability to obtain a correct answer. Entanglement-assisted classical communication protocols usually consist of two successive rounds: first, a Bell test round, in which the parties measure their local shares of the entangled state, and then a communication round, where they exchange classical messages. Here, we go beyond this standard approach and investigate adaptive uses of entanglement: we allow the receiver to wait for the arrival of the sender's message before measuring their share of the entangled state. We first show that such adaptive protocols improve the success probability in random access codes. Second, we show that once adaptive measurements are used, an entanglement-assisted bit becomes a strictly stronger resource than a qubit in prepare-and-measure scenarios. We briefly discuss the extension of these ideas to scenarios involving quantum communication and we identify resource inequalities.