Entropic time endowed in quantum correlations

Understand

A possible mechanism of time is formulated by developing an idea of time replaced by quantum correlations, with the aid of modern quantum information theory.

• We invent a microscopic model, where correlations of a closed system are steadily read out as internal, quantum clocks that define time via their relative phases.
• The model could realize emergent time evolutions which exhibit unitarity of quantum theory, while its underlying process is driven entropically.
• The key quantity turns out to be the amount of accessible information about the clocks recording past events.