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Universality of Entanglement Transitions from Stroboscopic to Continuous Measurements
M Szyniszewski1,2, A Romito1, H Schomerus1
1Department of Physics, Lancaster University, Lancaster LA1 4YB, United Kingdom.
Physical Review Letters
|December 4, 2020
Summary
Continuous measurements in nonintegrable quantum systems drive entanglement transitions, bridging theoretical models and real-world experiments. This research connects stroboscopic and continuous measurement findings for open quantum systems.
Area of Science:
- Quantum Information Science
- Condensed Matter Physics
- Statistical Mechanics
Background:
- Entanglement entropy scaling transitions are key to understanding thermalization in open quantum systems.
- These transitions are well-studied for stroboscopic measurements in random quantum circuits.
- Extending this to continuous measurements is crucial for physical relevance, with prior work showing immediate transitions in integrable models.
Purpose of the Study:
- To investigate the persistence of measurement-driven entanglement transitions in continuously measured, randomly nonintegrable quantum systems.
- To establish a connection between transitions in stroboscopic and continuous measurement regimes.
- To bridge theoretical insights from random quantum circuits to experimental settings.
Main Methods:
- Simulating continuously measured, randomly nonintegrable quantum systems.
- Analyzing entanglement entropy scaling.
- Comparing results with stroboscopic measurement models and integrable systems.
Main Results:
- Demonstrated that the entanglement transition persists at finite coupling in continuously measured, randomly nonintegrable systems.
- Showed a smooth connection between the continuous measurement transition and the one observed in stroboscopic models.
- Established that the transition's nature is not immediate for nonintegrable systems.
Conclusions:
- Measurement-driven entanglement transitions are robust in continuously measured, nonintegrable quantum systems.
- This work provides a unified framework connecting different measurement protocols and system types.
- Findings facilitate the application of theoretical knowledge to diverse experimental quantum systems.
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