Author

Suman Das

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Preprint Aug 2026

Analytic Spread Complexity from Level Statistics: From Chaos to Integrability

Spread complexity has emerged as a useful probe of quantum chaos, yet the microscopic spectral origin of its characteristic finite-time peak remains incompletely understood. We develop an analytic framework that relates spread complexity directly to local spectral statistics. Starting from an energy-space representatio...

Pallab Basu, Suman Das, Bigboy Madlala · 2 citations

Preprint Aug 2026

Quantum chaos and late-time equipartition of symmetry-resolved Krylov complexity

We study symmetry-resolved Krylov complexity in finite-dimensional chaotic quantum many-body systems. When both the Hamiltonian and the initial operator commute with a conserved charge, the operator dynamics decomposes into independent symmetry sectors, each with its own Krylov chain. We show that, after saturation, th...

Jayashis Das, Suman Das, Juan F. Pedraza et al. · 2 citations