Related Experiment Video
Updated: Nov 5, 2025

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
Published on: August 2, 2019
Entanglement Transition in a Monitored Free-Fermion Chain: From Extended Criticality to Area Law
O Alberton1, M Buchhold1, S Diehl1
1Institut für Theoretische Physik, Universität zu Köln, D-50937 Cologne, Germany.
Abstract:
We analyze the quantum trajectory dynamics of free fermions subject to continuous monitoring. For weak monitoring, we identify a novel dynamical regime of subextensive entanglement growth, reminiscent of a critical phase with an emergent conformal invariance. For strong monitoring, however, the dynamics favors a transition into a quantum Zeno-like area-law regime. Close to the critical point, we observe logarithmic finite size corrections, indicating a Berezinskii-Kosterlitz-Thouless mechanism underlying the transition. This uncovers an unconventional entanglement transition in an elementary, physically realistic model for weak continuous measurements. In addition, we demonstrate that the measurement aspect in the dynamics is crucial for whether or not a phase transition takes place.
Related Concept Videos
Fermi Level Dynamics
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
First Law: Particles in One-dimensional Equilibrium
Atomic Nuclei: Nuclear Relaxation Processes
Free Energy Changes for Nonstandard States
First Law: Particles in Two-dimensional Equilibrium
Newton's first law tells us about...
Phase Transitions: Melting and Freezing

