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Experimental demonstration of single photon nonlocality
Björn Hessmo1, Pavel Usachev, Hoshang Heydari
1Department of Microelectronics and Information Technology, Royal Institute of Technology (KTH), S-16440 Kista, Sweden. hessmo@imit.kth.se
Physical Review Letters
|June 1, 2004
Summary
This study demonstrates a robust single-photon Bell test using double homodyne measurements. The innovative method ensures interferometric stability, making quantum experiments more scalable.
Area of Science:
- Quantum Information Science
- Quantum Optics
- Experimental Physics
Background:
- Bell tests are crucial for verifying quantum mechanics against local hidden variable theories.
- Previous implementations often require complex and unstable interferometric setups.
- Single-photon experiments are fundamental for quantum communication and computation.
Purpose of the Study:
- To experimentally implement a single-photon Bell test.
- To develop a robust and scalable method for quantum correlation measurements.
- To avoid the need for interferometric stability in Bell tests.
Main Methods:
- Utilized a double homodyne measurement technique.
- Measured correlations within the Fock space of zero and one photons.
- Employed copropagating local oscillators in orthogonal polarization modes for distribution.
Main Results:
- Successfully implemented a single-photon Bell test.
- Demonstrated a method robust against interferometric instability.
- Achieved a scalable approach for quantum correlation experiments.
Conclusions:
- The developed method offers a practical and scalable platform for quantum Bell tests.
- This technique enhances the feasibility of advanced quantum experiments.
- The approach paves the way for more accessible quantum information processing.