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Entanglement Entropy Scaling Transition under Competing Monitoring Protocols | JoVE Visualize

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Entanglement Entropy Scaling Transition under Competing Monitoring Protocols

Mathias Van Regemortel¹, Ze-Pei Cian¹, Alireza Seif¹

¹Joint Quantum Institute, College Park, 20742 Maryland, USA and The Institute for Research in Electronics and Applied Physics, University of Maryland, College Park, 20742 Maryland, USA.

Physical Review Letters|April 9, 2021

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Summary

Dissipation can stabilize entangled quantum states. This study reveals how competing quantum measurements create long-range entanglement, leading to a phase transition in quantum trajectories.

Area of Science:

Quantum Information Science
Many-Body Physics
Quantum Optics

Background:

Dissipation typically causes quantum state decoherence.
Recent research shows tailored dissipation can stabilize entangled states.
Existing work focuses on engineered nonequilibrium steady states.

Purpose of the Study:

Investigate entanglement buildup in quantum trajectories.
Analyze competition between two distinct dissipation channels.
Explore measurement as a quantum jump monitoring process.

Main Methods:

Studying stochastic quantum trajectories.
Analyzing two incompatible continuous monitoring protocols.
Examining phase locking and dephasing mechanisms.

Main Results:

Demonstrated a transition in entanglement entropy scaling.
Observed a shift from critical scaling to area-law behavior.
Identified competition between entanglement generation and destruction.

Conclusions:

Measurement can be viewed as quantum jump monitoring.
Provides an alternative perspective on measurement-induced phase transitions.
Extends phase transitions into quantum optics.

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Quantum Physics

Quantum Information, Computation And Communication

Entanglement Entropy Scaling Transition Under Competing Monitoring Protocols