Dynamical quantum phase transitions in free-fermion quantum batteries produce nonanalytic singularities in long-time stored energy by making critical momentum modes charge perfectly at specific times.
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Measurement-based quantum Otto engines with POVMs and non-adiabatic operation extract more net work than conventional or PVM-based engines in specific regimes, even after reset costs.
Ergotropy in the battery corresponds one-to-one with total nonstabilizerness under U(1)-symmetric charger-battery interactions, while maximum average charging power in Clifford evolution is achievable even with zero initial magic.
Quantum many-body scars in the PXP model display extensive ergotropy that scales with system size and can be charged via coherent rotation resets, enabling their use for quantum many-body batteries.
A general analytical expression for classical ergotropy is derived and shown to be the classical limit of the quantum expression for ergodic systems, with the coherent-incoherent decomposition persisting classically.
citing papers explorer
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Dynamical Criticality Behind Energy-Storage Singularities in Quantum Batteries
Dynamical quantum phase transitions in free-fermion quantum batteries produce nonanalytic singularities in long-time stored energy by making critical momentum modes charge perfectly at specific times.
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Optimal work extraction in measurement-based quantum Otto engines: Non-adiabaticity and generalized measurements can be beneficial
Measurement-based quantum Otto engines with POVMs and non-adiabatic operation extract more net work than conventional or PVM-based engines in specific regimes, even after reset costs.
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Interplay of Nonstabilizerness and Ergotropy in Quantum Batteries
Ergotropy in the battery corresponds one-to-one with total nonstabilizerness under U(1)-symmetric charger-battery interactions, while maximum average charging power in Clifford evolution is achievable even with zero initial magic.
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Ergotropy of quantum many-body scars
Quantum many-body scars in the PXP model display extensive ergotropy that scales with system size and can be charged via coherent rotation resets, enabling their use for quantum many-body batteries.
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Unified theory of classical and quantum ergotropy
A general analytical expression for classical ergotropy is derived and shown to be the classical limit of the quantum expression for ergodic systems, with the coherent-incoherent decomposition persisting classically.