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Experimental Verification of Entanglement Generated in a Plasmonic System.
F Dieleman1, M S Tame2,3, Y Sonnefraud4,5
1Experimental Solid State Group, The Blackett Laboratory, Imperial College London , Prince Consort Road, London SW7 2BW, United Kingdom.
Nano Letters
|November 9, 2017
Summary
Researchers experimentally generated bipartite entanglement using surface plasmon polaritons and the Hong-Ou-Mandel effect in a nanophotonic system. Entanglement was verified using quantum state tomography, achieving high concurrence values.
Area of Science:
- Quantum physics
- Nanophotonics
Background:
- Entanglement generation is crucial for quantum technologies.
- Nanophotonic systems offer a promising platform for quantum information processing.
Purpose of the Study:
- To experimentally investigate bipartite entanglement generation in a nanophotonic system.
- To verify entanglement using quantum state tomography and quantify it with concurrence.
Main Methods:
- Utilizing the Hong-Ou-Mandel (HOM) effect through quantum interference of surface plasmon polaritons.
- Employing quantum state tomography for entanglement verification.
- Quantifying entanglement using concurrence.
Main Results:
- Successfully generated bipartite entanglement in the nanophotonic system.
- Achieved concurrence values up to 0.77 ± 0.04.
- Demonstrated that entanglement verification requires more than just HOM visibility.
Conclusions:
- Experimental verification of entanglement in HOM interference is non-trivial.
- The developed techniques are applicable to other photonic systems.
- This work contributes to the characterization of nanophotonic quantum devices.
