Discovered paper pair (Session 38). Detailed explanation not available.
Time-periodic stiffness variation induces parametric excitation in coupled components. Nonlinear restoring forces and friction interact to produce a spectrum of dynamic responses including periodic, quasi-periodic, and chaotic behaviors. System parameters (stiffness degree, mass symmetry, friction) determine stability boundaries and response amplitude.
view paper→Qualitative phase transition via spectral condensation at criticality. Progressive reentrant coupling drives system toward infrared critical regime where extensive band of slow collective modes emerges (spectral condensation), reorganizing dynamics qualitatively. Creates emergent capabilities absent at subcritical regime - transition in kind not degree, regardless of system scale.
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