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Quantum Zeno-type effect and non-Markovianity in a three-level system.
Antti Karlsson1, Francesco Francica2, Jyrki Piilo1
1Turku Centre for Quantum Physics, Department of Physics and Astronomy, University of Turku, FI-20014 Turun yliopisto, Finland.
Scientific Reports
|December 21, 2016
Summary
This study explores the quantum Zeno effect and non-Markovianity in decaying systems. Researchers found that controlling system couplings can engineer memory effects, showing a non-monotonic behavior with Zeno-like freezing.
Area of Science:
- Quantum optics
- Quantum information science
- Condensed matter physics
Background:
- The quantum Zeno effect typically inhibits system evolution.
- Non-Markovian dynamics describe systems with memory effects.
- Controlling quantum systems in structured environments is crucial for quantum technologies.
Purpose of the Study:
- Investigate the interplay between quantum Zeno-type effects and non-Markovianity.
- Explore how to engineer dissipation and memory effects via coherent coupling.
- Analyze these phenomena in both fast and slow dissipation regimes.
Main Methods:
- Modeling a decaying system coupled to a structured bosonic environment.
- Applying a control field to modify coherent coupling between system states.
- Analyzing system dynamics in different parameter regimes (good and bad cavity limits).
Main Results:
- Demonstrated coexistence of quantum Zeno-type effect and non-Markovianity.
- Showcased engineering of dissipation and memory effects by adjusting coherent coupling.
- Observed non-monotonic behavior of memory effects with increasing Zeno-like freezing.
- Identified a novel source for long-lasting non-Markovianity even after system decay.
Conclusions:
- System-reservoir interaction and environmental properties can remain unchanged while engineering quantum effects.
- Coherent coupling offers a powerful tool to control quantum memory and dissipation.
- The findings open avenues for robust quantum information processing and understanding complex quantum dynamics.
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