Quantum key distribution: Real-time compensation of interferometer phase drifta master thesis done in Quantum Cryptography Project at the Department of Electronics and Telecommunications
exchange from Radiophysics Department, St. Petersburg State Technical University
|Supervisor (Norway):||Professor Dag Roar Hjelme|
|Supervisor (Russia):||Vladimir Kuptsov, email@example.com|
The results were subsequently published in a paper.
An experimental QKD setup using phase-coding scheme was assembled and tested. A technique for compensating phase drift in real time was developed, implemented and tested. Results show that such a technique will work even on single-photon level, i.e. without adding components such as variable attenuator to the system.
Bob and Alice, mostly covered by thermoisolation. We worked with interferometer in this state.
And here is the LabVIEW VI that the phase adjustment algorithm was finally packed into:
Neat, huh? :))