A chance insight points to a compact physical principle that forbids going back in time. More details will follow after peer communication.
Physicists today announces that our research team has identified a concise physical condition that, we believe, settles a question Stephen Hawking made famous: why you cannot travel into your own past.
The idea surfaced unexpectedly. One of our physicists, listening to a Neil deGrasse Tyson conversation about Hawking’s view that nature protects chronology, revisited the problem and noticed a clean way to state the obstruction. Hawking suggested that a definitive reason would one day be found. Our result appears to provide that reason in a compact form.
“It started as a back-of-the-envelope check. The pieces clicked together more cleanly than we expected,” said a Physivitis scientist involved in the work. “We then tested the idea using standard tools from relativity and quantum theory, and the conclusion held up.”
In everyday terms, the principle says that attempts to engineer a return to one’s own past run up against a fundamental accounting rule in physics: you can arrange local effects that look helpful in the short run, but when the full picture is tallied the necessary conditions never materialise.
We are preparing a short technical note for the research community, followed by a longer paper after expert feedback. Until then, we will not release methodological specifics.
“It’s the economy of the argument that gives us confidence,” another team member said. “Different parts of physics point to the same simple rule.”
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