5 papers
Local Impurity Induced Growth and Scrambling in Clean Free Fermions
Qucheng Gao, Vikram Ravindranath, Xiao Chen
We study impurity-induced particle growth and scrambling in clean one-dimensional free-fermion systems. We show that a single local impurity can act as a branching source: particle…
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…
Free fermions under adaptive quantum dynamics
Vikram Ravindranath, Zhi-Cheng Yang, Xiao Chen
We study free fermion systems under adaptive quantum dynamics consisting of unitary gates and projective measurements followed by corrective unitary operations. We further introduc…
Entanglement Transitions in Noisy Quantum Circuits on Trees
Vikram Ravindranath, Yiqiu Han, Xiao Chen
Decoherence is ubiquitous, and poses a significant impediment to the observation of quantum phenomena, such as the measurement-induced entanglement phase transition (MIPT). In this…
Quantum Entanglement Phase Transitions and Computational Complexity: Insights from Ising Models
Hanchen Liu, Vikram Ravindranath, Xiao Chen
In this paper, we construct 2-dimensional bipartite cluster states and perform single-qubit measurements on the bulk qubits. We explore the entanglement scaling of the unmeasured 1…