Quantum optical sensing with diamonds 

Grant Agreement No.: 14.W03.31.0028

Leading Scientist: Dr. Hemmer Philip Robert

Fields of scientific research: Material technologies


The long term goal of the project is to develop novel nanoscale sensors, computation elements, and lithographic techniques using the quantum optical properties of diamond color centers. To accomplish this, a number of diamond color centers will be investigated including some unpublished and recently published. To simplify comparison of different color centers for the intended applications a common testbed will designed and constructed which consists of a microscope system optimized to probe a thin, shallow layer of color centers in a bulk diamond. This approach will allow the color centers to be close to the surface, as required for sensing, super-resolution imaging/lithography and some computing element applications, yet ensures that the surround diamond is of high quality. To create the thin layers of color centers, bulk diamonds will be implanted and/or over-growth, followed by annealing and other post-processing when necessary. To facilitate these applications, techniques to eliminate the need for direct microwave excitation of the spin coherences will be explored, for example by identifying promising color centers for optical Raman excitation of spin coherences at temperatures approaching ambient.

Single-photon sources of light in the infrared range for organizing a secret communication channel in a turbulent atmosphere

Grant Agreement No.: RFBR 18-29-20091

Leading Scientist: Dr. Shkalikov Andrei

Fields of scientific research: Modern problems of infrared photonics


The project is devoted to the development of controlled single-photon sources with an orbital angular momentum in the telecommunication wavelength range based on spontaneous parametric down conversion of light, as well as theoretical and experimental investigation of quantum channels in a turbulent atmosphere. To increase the degree of determinism of the source, multiplexing of several nonlinear processes will be used. It is supposed to experimentally realize the method of preparing photons with an orbital angular momentum in the process of spontaneous parametric down conversion of light in the cavity. Using this method will significantly increase the brightness of the source and will make it possible to control the angular momentum of the generated photons by means of pump pulses. In addition, experiments will be carried out to prepare multidimensional states and to study quantum channels in a turbulent atmosphere. All experimental developments will be preliminary theoretically calculated and modeled. In addition, theoretically, it is planned to develop quantum communication schemes in the open space on the basis of teleportation of states with an orbital angular momentum.

Development of efficient protocols of information processing and transmission based on high-dimensional quantum states 

Grant Agreement No.: RSF 19-19-00656

Leading Scientist: Dr. Sci. Ablaev Farid

Fields of scientific research: Quantum optical technologies


The project is about development of efficient quantum systems for information processing and communication. The system provides high security, based on main laws of quantum mechanics.
The basis quantum function for considered quantum communication protocols is a quantum hash function. Our group suggested the quantum hashing technique that is base for development of efficient quantum optical protocols for authentication, friend-foe protocols, new generation digital signature protocols. The main requirement for the optimal quantum hash function is the maximum entanglement of qubits that make up the state of the hash. The implementation of the function is difficult technical problem. In this project, it is proposed to use multidimensional single-photon states of light, qudits, instead of using the system of entangled qubits. We plan to experimentally implement of the main quantum communication protocols that use quantum hash function. The implementation will use sources of one-photon light states with notification based on Spontaneous parametric down-conversion. We will focus on protocols that use multidimensional single-photon states in the basis of the orbital angular momentum and oriented to atmospheric optical communication channels. The expected results can be the basis for developing a new generation of quantum processing and quantum communication systems.

Integrated single-photon sources with multiplexing

Grant Agreement No.: RSF 16-12-00045

Leading Scientist: Dr. Sci. Goltsman Grigory

Fields of scientific research: Quantum optical technologies


The project is devoted to development and creation of integrated single-photon sources based on spontaneous four-wave mixing in microring resonators. Such single-photon sources are essential elements of promising schemes for quantum repeaters and linear optical quantum computation. In the course of the project it is planned to achieve high efficiency of the source by means of spatial multiplexing and photon-number resolving detecting. In doing so, new technical solutions will be introduced for designing, manufacturing and optimizing various components of the single-photon source, and new approaches to realizations of planar optical devices. The present project is a continuation of the Project 2016, in which high-quality microring resonators were developed and spontaneous four-wave mixing was observed. All in all, the project will enable significant progress in the development of integrated optical circuits utilizing quantum information processing methods.

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