Quenching a mixed-field Ising chain from paramagnetic to ferromagnetic parameters makes small subsystems display strong non-Markovian, memory-retaining dynamics, while the reverse quench is nearly Markovian.
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Non-Markovianity of subsystem dynamics in isolated quantum many-body systems
Quenching a mixed-field Ising chain from paramagnetic to ferromagnetic parameters makes small subsystems display strong non-Markovian, memory-retaining dynamics, while the reverse quench is nearly Markovian.