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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
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Experimental Time-Resolved Interference with Multiple Photons of Different Colors.
Xu-Jie Wang1,2,3, Bo Jing1,2,3, Peng-Fei Sun1,2,3
1Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
Physical Review Letters
|September 8, 2018
Summary
Researchers demonstrated a novel time-resolved multiphoton interference experiment using non-identical photons from atomic-ensemble quantum memories. This approach offers a potential pathway to achieving quantum supremacy with scalable boson sampling experiments.
Area of Science:
- Quantum optics
- Quantum information science
- Atomic physics
Background:
- Multiphoton interference in linear-optical networks is crucial for quantum technologies like computation and metrology.
- Boson sampling experiments, a key quantum computation task, face scalability challenges due to the need for highly indistinguishable photons.
- Existing physical systems often struggle to produce the required indistinguishable single photons for large-scale experiments.
Purpose of the Study:
- To demonstrate a time-resolved multiphoton interference experiment using photons with distinct frequency spectra.
- To explore the feasibility of boson sampling with non-identical photons.
- To provide a scalable route towards quantum supremacy.
Main Methods:
- Utilized three atomic-ensemble quantum memories to generate photons with non-overlapping frequency spectra.
- Performed time-resolved measurements to capture multiphoton interference.
- Analyzed nonclassical multiphoton correlation landscapes and their symmetries.
Main Results:
- Successfully observed time-resolved multiphoton interference patterns.
- Experimental results showed excellent agreement with theoretical predictions.
- Identified symmetries in the observed correlation landscapes that correspond to the optical network's symmetries.
Conclusions:
- The experiment successfully demonstrated multiphoton interference using non-identical photons, overcoming a key limitation in quantum optics.
- This method provides a viable strategy for scaling up boson sampling experiments.
- The findings suggest a promising direction for achieving quantum supremacy using readily available, non-identical quantum resources.
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