Conceivable superluminal transmission of classical information and application

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Einstein’s general relativity and quantum theory have inspired numerous proposals for time travel, particularly into the past, including ideas for superluminal transmission of classical information. However, transitioning from theoretical concepts to practical realization poses significant challenges and costs, if it is feasible at all. Sending classical information into the past raises the issue of potentially creating inconsistent histories. A proposed solution involves an exclusion principle that would prevent the occurrence of such inconsistencies, allowing only consistent histories to manifest, with their probabilities potentially increased by a specific factor outlined in the text. This exclusion principle, along with alternative versions, could be tested through future experiments, although further analysis is needed, particularly in the context of quantum field theory. If reliable transmission of classical information under this principle can be achieved over sufficient distances, a variety of applications could emerge, including rapid solutions to complex computational problems, advancements in future computers, quantum teleportation, and the development of sophisticated machines and robots. Various forms of exclusion principles are discussed, with the potential for experimental validation and the need for detailed quantum field theoretic computations in future research.