Derives that ground-state overlap dominance after quenches requires the initial and final Bloch vectors to have positive dot product in every momentum sector, disproving the phase-based conjecture with explicit Kitaev-chain counterexamples.
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Spectral softening in driven quadratic systems causes the partition function to diverge and adiabaticity to fail below a finite drive-dependent frequency threshold, rendering equilibrium ill-defined.
A review that bridges invariant methods and squeezing formalism to describe excitations and adiabaticity breakdown in time-dependent quantum harmonic oscillators.
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Exact Criterion for Ground-State Overlap Dominance after Quantum Quenches
Derives that ground-state overlap dominance after quenches requires the initial and final Bloch vectors to have positive dot product in every momentum sector, disproving the phase-based conjecture with explicit Kitaev-chain counterexamples.
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Spectral Softening and the Structural Breakdown of Thermodynamic Equilibrium
Spectral softening in driven quadratic systems causes the partition function to diverge and adiabaticity to fail below a finite drive-dependent frequency threshold, rendering equilibrium ill-defined.
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Squeezing and adiabaticity breaking in time-dependent quantum harmonic oscillators
A review that bridges invariant methods and squeezing formalism to describe excitations and adiabaticity breakdown in time-dependent quantum harmonic oscillators.