4 papers
Krylov geometry and optimal recovery under uncertain coherent noise
Abhishek Chowdhury
Recovery from a coherent rotation with an unobserved angle depends on both the encoding and what calibration reveals about the noise. We determine their combined limit for a known…
Hidden kinetic correlations control collective phases of entropy-conditioned histories
Abhishek Chowdhury
Visible dynamics and mean dissipation need not determine the collective phases of rare histories. We construct local Markov models with identical ordinary visible path distribution…
Polynomial Initial-State Jumps and Christoffel Transforms in Krylov Complexity
Abhishek Chowdhury, Ajit Prasad Mahapatra
At fixed Hamiltonian , changing the initial state changes the cyclic pair and hence generally the Lanczos basis and spread. For every normalizable polynomial preparation $\lvert…
Krylov Complexity of Time-Dependent Optical Hamiltonians
Abhishek Chowdhury, Aryabrat Mahapatra, Ajit Prasad Mahapatra
State Krylov complexity becomes experimentally concrete in driven optics because its chain can be interrogated through excitation counting, parity, return probability, and phase. I…