Typical trace-distance relaxation concentrates around a mean in open quantum systems, producing typical mixing times separated from worst-case by rare-state bottlenecks that scale logarithmically, linearly, or exponentially depending on the slow modes.
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A periodic matrix product operator representation of the influence functional yields a numerically exact Floquet propagator for non-Markovian dynamics in strongly damped driven quantum systems.
A quantum Zeno dynamics protocol confines the evolution of a finite-time Otto-cycle quantum heat engine to a subspace that preserves instantaneous energy populations, recovering quasistatic efficiency with added thermodynamic costs from monitoring and switching.
Nonlinear Gross-Pitaevskii qubits enable quantum Otto engines with significantly higher efficiency than linear engines.
Higher thermodynamic efficiency in preparing non-equilibrium spin states in atomic vapors directly improves the quantum Fisher information bound on magnetometer sensitivity.
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Zeno-Assisted Quantum Heat Engines
A quantum Zeno dynamics protocol confines the evolution of a finite-time Otto-cycle quantum heat engine to a subspace that preserves instantaneous energy populations, recovering quasistatic efficiency with added thermodynamic costs from monitoring and switching.