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Detector-Independent Verification of Quantum Light
J Sperling1, W R Clements1, A Eckstein1
1Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom.
Physical Review Letters
|May 6, 2017
Summary
We present a new method to verify nonclassical light using multiplexing. This approach bypasses detector complexities, offering a robust way to confirm quantum light properties.
Area of Science:
- Quantum Optics
- Quantum Information Science
Background:
- Verifying nonclassical light typically requires detailed knowledge of detector properties.
- Existing methods can be complex and sensitive to the interaction between light and detectors.
Purpose of the Study:
- To develop a detector-independent method for verifying nonclassical light.
- To establish theoretical bounds for classical light statistics in a specific measurement setup.
Main Methods:
- Utilizing a multiplexing arrangement for light detection.
- Analyzing coincidence statistics, which are theoretically shown to be a mixture of multinomial distributions for classical light.
- Formulating classical bounds based on these statistical properties.
Main Results:
- Demonstrated a method for verifying nonclassicality independent of detector characteristics.
- Applied the method to heralded multiphoton states using superconducting transition-edge sensors.
- Verified and characterized nonclassicality through the violation of derived classical bounds.
Conclusions:
- The developed multiplexing method provides a robust and accessible way to verify nonclassical light.
- This technique eliminates the need for complex detector calibration in nonclassicality verification.
- The findings offer a significant advancement in quantum state characterization and verification.
