Thermofield dynamics: Quantum Chaos versus Decoherence

Understand

Quantum chaos imposes universal spectral signatures that govern the thermofield dynamics of a many-body system in isolation.

• The fidelity between the initial and time-evolving thermofield double states exhibits as a function of time a decay, dip, ramp and plateau.
• Sources of decoherence give rise to a nonunitary evolution and result in information loss.
• Energy dephasing gradually suppresses quantum noise fluctuations and the dip associated with spectral correlations.