A5033106462- Quantum Information and Cryptography
- Optical Network Technologies
- Quantum Computing Algorithms and Architecture
- Quantum Mechanics and Applications
- Optical Wireless Communication Technologies
- Quantum optics and atomic interactions
- Photonic and Optical Devices
- Advanced Photonic Communication Systems
- Semiconductor Lasers and Optical Devices
- Molecular Communication and Nanonetworks
- Chaos-based Image/Signal Encryption
ITMO University
2015-2024
Institute of Information Technologies
2014
A quantum key distribution system based on the subcarrier wave modulation method has been demonstrated which employs BB84 protocol with a strong reference to generate secure bits at rate of 16.5 kbit/s an error 0.5% over optical channel 10 dB loss, and 18 bits/s 0.75% 25 loss. To best our knowledge, these results represent highest loss reported for using approach. passive unidirectional scheme used compensate polarization dependence phase modulators in receiver module, resulted high...
We demonstrate qubit transmission via an optical cable in a metropolitan area network using quantum communications sidebands with record-setting system parameters for such systems mode. The sifted-key generation rate was 1.06 Mbits/s losses of 1.63 dB and error coefficient 1%.
We experimentally demonstrate quantum communication in 10 dB loss outdoor atmospheric channel with 5 kbit/s bitrate using subcarrier wave coding method. Free-space link was organized by telescoping system symmetric fiber-optic collimators.
We experimentally demonstrate quantum key distribution at 28 bit/s rate in a telecommunications fiber channel with 45 dB loss using subcarrier wave approach. This approach offers polarization independency, high bitrates and wide multiplexing capabilities.
Subcarrier wave quantum networking in different media (fiber-optic lines, atmospheric free-space and underwater free-spce) is presented this work.
The work is devoted to the creation of a telescopic transceiver system that organizes an atmospheric point-to-point communication channel, and its use for quantum at sideband frequencies as “last mile” data protection in geographically distributed centre
In the course of work on creating first quantum communication network in Russia we demonstrated key distribution metropolitan optical infrastructure. A single-pass subcarrier wave cryptography scheme was used experiments. BB84 protocol with strong reference chosen for performing distribution. The registered sifted rate an cable 1.5 dB loss 800 Kbit/s. Signal visibility exceeded 98%, and bit error value 1%. achieved result is a record this type systems.
We study influence of quantum signal polarization distortions in the optical fiber on interference pattern visibility a subcarrier wave key distribution system. An scheme compensation unit is suggested, and dynamics QBER depending architecture explored.
Numerically, a theoretical analysis of the noise impact caused by spontaneous Raman scattering, four-wave mixing, and linear channel crosstalk on measurement-device-independent continuous variable quantum key distribution systems is conducted.The considers symmetry asymmetry system paths, as well possible allocation schemes, for located in C-and O-bans.Mathematical models MDI CV-QKD contributing noises' description are provided.The secure generation rate estimated to state features protocol...
We present an optical quantum random number generator based on vacuum fluctuation measurements that uses multi-mode coherent states generated by electro-optical phase modulation of intense carrier. In this approach the weak state (or a state) interferes with carrier, which acts as local oscillator, each side mode independently. The proposed setup can effectively compensate for deviations between two arms balanced detector controlling index modulator. perform proof-of-principle experiment and...