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Towards underwater quantum communication in the mesoscopic intensity regime
Optics Express
|December 16, 2022
Summary
This study explores secure underwater communication using mesoscopic twin-beam states and photon-number-resolving detectors. Nonclassical twin-beam states can be maintained through water, enabling loss and noise analysis for quantum communication channels.
Area of Science:
- Quantum optics
- Quantum communication
- Photonics
Background:
- Secure underwater communication faces significant challenges.
- Current quantum communication experiments often focus on single photons.
- Novel quantum technologies offer potential solutions for secure communication.
Purpose of the Study:
- To investigate the use of mesoscopic twin-beam states for secure underwater communication.
- To evaluate the performance of commercial photon-number-resolving detectors in this scenario.
- To demonstrate the extraction of channel information from nonclassicality.
Main Methods:
- Utilizing mesoscopic twin-beam states of light.
- Employing two classes of commercial photon-number-resolving detectors.
- Propagating the signal beam through water-filled tubes and the idler beam in free space.
Main Results:
- Twin-beam states exhibit nonclassicality even when the signal travels through water.
- The nonclassicality of the twin-beam states is preserved under these conditions.
- Information about loss and noise in the transmission channels can be extracted by studying nonclassicality.
Conclusions:
- Mesoscopic twin-beam states are a viable resource for secure underwater quantum communication.
- Photon-number-resolving detectors are suitable for such applications.
- The proposed method allows for characterization of underwater quantum communication channels.
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