Loss-Tolerant Multi-Phase Estimation with Parametric Amplification
Published:Dec 30, 2025 08:47
•1 min read
•ArXiv
Analysis
This paper addresses the problem of loss and detection inefficiency in continuous variable (CV) quantum parameter estimation, a significant hurdle in real-world applications. The authors propose and demonstrate a method using parametric amplification of entangled states to improve the robustness of multi-phase estimation. This is important because it offers a pathway to more practical and reliable quantum metrology.
Key Takeaways
- •Proposes a method to improve the robustness of quantum parameter estimation against loss and detection inefficiency.
- •Utilizes parametric amplification of entangled states.
- •Demonstrates multi-phase estimation with two-mode EPR and four-mode cluster states.
- •Offers a pathway to more practical quantum metrology.
Reference
“The authors find multi-phase estimation sensitivity is robust against loss or detection inefficiency.”