A Fresh Tachyon Theory Reframes Time, Causality, and Relativity

Physicists from the University of Warsaw and Oxford propose a revised tachyon quantum field theory that doubles the Hilbert space into a twin-space framework, restoring covariance and a stable vacuum while allowing faster-than-light particles to fit within relativity without paradoxes. The work is theoretical and conceptual, not experimental, and could reshape how time symmetry, causality, and quantum fields are understood, though it does not claim tachyons exist.