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Physicists reveal universal speed limit on quantum information scrambling

phys.org·Sam Jarman·about 1 month ago
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Study reveals a lower limit in the time taken for information to be shared between quantum states. Credit: Amit Vikram Theoretical physicists in the US have discovered a "speed limit" on the time taken for quantum information to spread through larger systems. Publishing their results in Physical Review Letters , Amit Vikram and colleagues at the University of Maryland have proved for the first time that this minimum time is closely linked with a system's entropy and temperature, perhaps paving the way for a deeper understanding of quantum information across a wide range of physical settings. Sharing information In 1974, Stephen Hawking proposed for the first time that black holes aren't entirely black. As well as emitting thermal radiation (now known as " Hawking radiation "), they also exhibit thermodynamic properties including temperature and an entropy proportional to their surface area.…

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