3 papers
cond-mat.stat-mech2026
Non-linear Sigma Model for the Surface Code with Coherent Errors
Stephen W. Yan, Yimu Bao, Sagar Vijay
The surface code is a promising platform for a quantum memory, but its threshold under coherent errors remains incompletely understood. We study maximum-likelihood decoding of the…
quant-ph2025
Information dynamics and symmetry breaking in generic monitored -symmetric open quantum systems
Jacob Hauser, Ali Lavasani, Sagar Vijay +1
We investigate the steady-state phases of generic -symmetric monitored, open quantum dynamics. We describe the phases systematically in terms of both information-theo…
quant-ph2024
Dissipative Dynamical Phase Transition as a Complex Ising Model
Stephen W. Yan, Diego Barberena, Matthew P. A. Fisher +1
We investigate a quantum dynamical phase transition induced by the competition between local unitary evolution and dissipation in a qubit chain with a strong, on-site $\mathbb{Z}_2…