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Scalable Generation of Multiphoton Entangled States by Active Feed-Forward and Multiplexing
Evan Meyer-Scott1, Nidhin Prasannan1, Ish Dhand2
1Paderborn University, Integrated Quantum Optics, Institute for Photonic Quantum Systems (PhoQS), 33098 Paderborn, Germany.
Physical Review Letters
|October 21, 2022
Summary
Researchers developed a new method for scalable generation of multiphoton entangled quantum states, significantly boosting production rates for quantum communications and computation.
Area of Science:
- Quantum Information Science
- Quantum Optics
- Experimental Physics
Background:
- Multiphoton entangled quantum states are crucial for quantum technologies like communication, sensing, and computation.
- Scalable generation of these states is a major experimental hurdle, with current methods suffering from exponentially decreasing rates as photon numbers increase.
Purpose of the Study:
- To address the challenge of scalable multiphoton entangled state generation.
- To significantly enhance the generation rates of multi-photon states for practical quantum applications.
Main Methods:
- Implementation of a novel system utilizing active feed-forward and multiplexing techniques.
- Demonstration of scalable generation of four-photon and six-photon Greenberger-Horne-Zeilinger states.
Main Results:
- Achieved substantial increases in generation rates: 9-fold for four-photon states and 35-fold for six-photon states.
- Experimental results align with theoretical predictions of exponential enhancement over standard non-multiplexed approaches.
Conclusions:
- The developed system enables scalable generation of multiphoton entangled states, overcoming previous limitations.
- These advancements pave the way for practical implementation of multiphoton protocols in photonic quantum technologies.
