A team of physicists at the Universities of Vienna, Bristol, IFISC and the Institute for Quantum Optics and Quantum Information (IQOQI-Vienna) has shown how quantum systems can simultaneously evolve along two opposite time arrows (forward and backward in time). The study has been published in the latest issue of Communications Physics.Forward and backward time flowsWhen looking at the celestial motion, one often perceives a sense of eternity that could lead us to wonder whether time really ex...
