collaborators

8 papers

quant-ph2026

Coherent error induced phase transition

Hanchen Liu, Xiao Chen

The paper examines how coherent unitary errors impact logical information in stabilizer quantum error‑correcting codes and discovers a phase transition at a critical error rate whe…

quant-ph2026

Measurement-and Feedback-Driven Non-Equilibrium Phase Transitions on a Quantum Processor

Zhiyi Wu, Xuandong Sun, Songlei Wang +8

Mid-circuit measurements and feedback operations conditioned on the measurement outcomes are essential for implementing quantum error-correction on quantum hardware. When integrate…

quant-ph2026

Diffusive Relaxation of Participation Entropy in U(1)-symmetric Dynamics

Hanchen Liu, Tianci Zhou, Xiao Chen

Participation entropy (PE) quantifies the spread of a many-body wavefunction across configuration space. While PE relaxes rapidly in generic chaotic systems, we show that $\mathrm{…

quant-ph2026

Critical behaviors of magic and participation entropy at measurement induced phase transitions

Eliot Heinrich, Hanchen Liu, Tianci Zhou +1

We study the participation and stabilizer entropy of non-unitary quantum circuit dynamics, focusing on the critical line that separates the low-entanglement spin-glass phase and th…

quant-ph2025

From Quantum Circuits with Ultraslow Dynamics to Classical Plaquette Models

Vikram Ravindranath, Hanchen Liu, Xiao Chen

We introduce a family of hybrid quantum circuits involving unitary gates and projective measurements that display a measurement-induced phase transition. Remarkably, the volume-law…

quant-ph2025

Magic transition in monitored free fermion dynamics

Cheng Wang, Zhi-Cheng Yang, Tianci Zhou +1

We investigate magic and its connection to entanglement in 1+1 dimensional random free fermion circuits, with a focus on hybrid free fermion dynamics that can exhibit an entangleme…