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Updated: Jul 6, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

Protecting entanglement via the quantum Zeno effect.

Sabrina Maniscalco¹, Francesco Francica, Rosa L Zaffino

¹Department of Physics, University of Turku, Turun yliopisto, FIN-20014 Turku, Finland. sabrina.maniscalco@utu.fi

Physical Review Letters

|March 21, 2008

Summary

We explore atomic entanglement in a noisy resonator, revealing entanglement revivals and oscillations due to system-environment interactions. A quantum Zeno effect strategy is proposed to preserve entanglement.

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Last Updated: Jul 6, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

Area of Science:

Quantum physics
Atomic physics
Cavity quantum electrodynamics

Background:

Entanglement is a key quantum phenomenon crucial for quantum information processing.
Lossy resonators introduce environmental noise that can degrade quantum states.
Understanding entanglement dynamics in realistic noisy systems is essential for developing quantum technologies.

Purpose of the Study:

To investigate the precise dynamics of entanglement between two atoms in a dissipative optical cavity.
To analyze the impact of system-reservoir correlations on entanglement.
To propose a method for mitigating entanglement decay using the quantum Zeno effect.

Main Methods:

Analytical and numerical methods to solve the system's master equation.
Analysis of steady-state entanglement.
Investigation of transient dynamics, including revivals and oscillations.

Main Results:

The study reveals that system-reservoir correlations can induce entanglement revivals and oscillations, even in a lossy resonator.
Steady-state entanglement is analyzed, showing its dependence on system parameters.
The strong coupling regime exhibits particularly rich dynamics.

Conclusions:

Entanglement dynamics in lossy resonators are complex, featuring non-monotonic behavior.
The quantum Zeno effect can be employed as a viable strategy to counteract entanglement deterioration.
This research offers insights into preserving quantum correlations in realistic noisy quantum systems.