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Doctoral thesis
Open access
English

Protocol and devices for practical quantum information processing

ContributorsLunghi, Tommaso
DirectorsZbinden, Hugoorcid
Defense date2014-10-21
Abstract

During my thesis I investigated several technologies and protocols aiming at practical quantum-cryptography applications. Firstly, I developed a free-running single-photon detector for telecom wavelengths featured by an extremely low noise that competes with the state-of-the-art superconducting single-photon detectors. Then I developed a testbench for metrological characterization of single-photon detectors. A special source of spontaneous emission and a radiometer have been developed during this work. Both the source and the radiometer are based on an Erbium-doped fiber and have been built using standard commercial components. In the third part of my thesis I discuss the first experimental demonstration of a bit commitment protocol provably secure. Finally I investigated an innovative approach to self-test the randomness underlying a quantum process. This approach allows generating unpredictable strings of bits with few calibrations of the device.

eng
Keywords
  • Single-photon detector
  • Quantum communication
  • Bit commitment
  • Random Number Generator
Research group
Citation (ISO format)
LUNGHI, Tommaso. Protocol and devices for practical quantum information processing. 2014. doi: 10.13097/archive-ouverte/unige:45940
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Thesis
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Technical informations

Creation12/22/2014 3:49:00 PM
First validation12/22/2014 3:49:00 PM
Update time05/30/2023 1:21:04 PM
Status update05/30/2023 1:21:04 PM
Last indexation05/02/2024 3:58:04 PM
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