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Coherence control of entanglement dynamics of two-mode Gaussian state via Raman driven quantum beat laser using
Applied Optics
|January 16, 2019
Summary
We investigated quantum entanglement in a laser system. Higher initial non-classicality boosts entanglement, while purity has no effect. Driving field intensity and phase control the entanglement dynamics.
Area of Science:
- Quantum Optics
- Quantum Information Theory
Background:
- Quantum entanglement is a fundamental resource in quantum information processing.
- Understanding entanglement dynamics in driven open quantum systems is crucial for quantum technologies.
Purpose of the Study:
- To analyze the entanglement dynamics of two-mode Gaussian states (TMGS) in a quantum beat laser.
- To investigate the influence of non-classicality, purity, and relative phase of cavity modes on entanglement.
- To explore the role of cavity decay rates and driving field parameters.
Main Methods:
- Utilized Simon's criterion for quantifying quantum state separability.
- Modeled a quantum beat laser driven by two classical fields in a Raman configuration.
- Analyzed the effects of initial state properties and system parameters on entanglement evolution.
Main Results:
- Higher initial non-classicality leads to greater inseparability in the evolved TMGS.
- Entanglement inseparability is independent of the initial purity of the cavity modes.
- Cavity decay rates enhance entanglement with increasing non-classicality.
- Driving field intensity extends the entanglement time scale, while relative phase induces entanglement switching.
Conclusions:
- Non-classicality is a key driver for entanglement in this laser system.
- Entanglement dynamics are sensitive to driving field parameters and initial state properties.
- The study provides insights into controlling and sustaining quantum entanglement in open quantum systems.
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