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Updated: Oct 17, 2025
07:56
A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
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Cross talk compensation in multimode continuous-variable entanglement distribution
Optics Express
|October 7, 2021
Summary
Optimizing initial two-mode squeezing and receiver-side adjustments can mitigate cross talk in quantum networks. This approach enhances the robustness of distributed Gaussian entanglement for scalable quantum information protocols.
Area of Science:
- Quantum Information Science
- Quantum Optics
- Quantum Communication
Background:
- Two-mode squeezed states are crucial for scalable continuous-variable and hybrid quantum information protocols.
- Entanglement distribution over noisy channels is a significant challenge in quantum networks.
Purpose of the Study:
- To investigate the impact of linear cross talk on distributed two-mode squeezed states.
- To develop methods for reducing entanglement degradation caused by cross talk in parallel quantum channels.
Main Methods:
- Theoretical analysis of two-mode squeezed states propagating through channels with linear cross talk.
- Optimization of initial squeezing parameters in the presence of cross talk.
- Simultaneous optimization of relative phase and linear coupling at the receiver.
Main Results:
- Optimizing initial squeezing reduces entanglement degradation from small cross talk.
- Receiver-side optimization, including phase and coupling adjustment, can fully compensate for cross talk in channels with identical transmittance.
- Significant cross talk compensation is achievable even in realistic channels with similar transmittance values.
Conclusions:
- The proposed method of receiver-side mode interference offers an effective alternative to entanglement localization techniques.
- These findings enable more efficient utilization of multimode continuous-variable photonic entanglement in scalable quantum networks.
- The research contributes to building more robust and efficient quantum communication systems.
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