3 papers
cond-mat.stat-mech2026
A Three-State Markov Process as a Pedagogical Example of the Continuous-Time Approximation
Koichi Nakagawa
We present a pedagogical analysis of a fully connected three-state Markov process, focusing on the validity and limitations of the continuous-time approximation to discrete-time dy…
quant-ph2026
Relative Entropy Revivals Caused by Memory-Induced Loss of Divisibility in Classical Non-Markovian Dynamics
Koichi Nakagawa
Relative-entropy revivals and negative entropy-production rates are established signatures of memory effects in non-Markovian dynamics. The present paper addresses a more specific…
quant-ph2026
Impulsively Driven Fractional Relaxation: Exact Response, Scaling Laws, Frequency-Domain Signatures, and Memory-Induced Crossover Structures
Koichi Nakagawa
We investigate periodically impulsive fractional relaxation as a minimal model of nonlocal dissipative dynamics under repeated external stimulation. The free relaxation law is clas…