Quantum reservoir probing of quantum phase transitions

Understand

Quantum phase transitions are highly remarkable phenomena manifesting in quantum many-body systems.

• However, their precise identifications in equilibrium systems pose significant theoretical and experimental challenges.
• Thus far, dynamical detection protocols employing global quantum quenches have been proposed, wherein transitions are discerned via global nonequilibrium excitations.
• In this work, we demonstrate that quantum phase transitions can be detected through localized out-of-equilibrium excitations induced by local quantum quenches.