2 papers
cond-mat.stat-mech2025
Measurement-induced phase transitions in quantum inference problems and quantum hidden Markov models
Sun Woo P. Kim, Curt von Keyserlingk, Austen Lamacraft
Recently, there is interest in coincident 'sharpening' and 'learnability' transitions in monitored quantum systems. In the latter, an outside observer's ability to infer properties…
cond-mat.stat-mech2025
The planted directed polymer: inferring a random walk from noisy images
Sun Woo P. Kim, Austen Lamacraft
We introduce and study the planted directed polymer, in which the path of a random walker is inferred from noisy 'images' accumulated at each timestep. Formulated as a nonlinear pr…