8 papers
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…
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…
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{…
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…
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…
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…