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Quantum Devices in Optical Communicating Systems

#3674


Quantum Information Processing Devices on the Base of Optical Transients and Collective Phenomena for Optical Communication: Research and Development

Tech Area / Field

  • PHY-OPL/Optics and Lasers/Physics

Status
3 Approved without Funding

Registration date
13.12.2006

Leading Institute
Kurchatov Research Center, Russia, Moscow

Supporting institutes

  • Russian Academy of Sciences / Kazan Physical-Technical Institute, Russia, Tatarstan, Kazan

Collaborators

  • Jenoptik AG, Germany, Jena\nLund Institute of Technology
  • Department of Physics, Sweden, Lund\nMontana State University / Department of Physics, USA, MT, Bozeman

Project summary

The aim of the project is to develop physical principles of functioning quantum devices of multi-channel processing, storing and distribution of information on the basis of photon echo and superradiance for optical communication systems.

Modern development of information technologies is closely connected with the transition from electronic techniques of information processing to completely optical ones. On the one hand, it is due to constantly increasing body of information transferred over optic communication channels. On this background there has risen a demand for the development of multi-channel optical processors, capable of implementing the processing of a great body of information, and also multi-channel systems of optical memory. On the other hand, it allows one to use non-classic light states for information transfer and realise protocols of quantum cryptography and teleportation in communication systems which give new vistas for a further confidentiality enhancement in the data transfer, dense coding, etc. Thus, the advanced approach to creating multi-channel systems of optical data-processing is the method based on fully optical methods and oriented not only to the classic, but also to quantum information carriers.

The main task of the proposed project is theoretical and experimental investigations aimed at producing high-rate multi-channel systems of optical processing, storing and data distribution based on photon echoes and superradiance with the use of code pision of channels in optic communication lines. In particular, the experiments on demonstrating the coded channel pision in photon-echo optical memory devices and coherent detection of phase-modulated signals are being projected. Besides, the project assumes the search for capabilities of converting phase-modulated signals between various frequency ranges and their time compression in view of reaching phase-modulation rate unattainable with electro-optical schemes. The development of advanced methods of phase coding and code channel pision for being used in quantum optical communication systems is also projected. Prominence is given to the solution of an important practical problem of transition from helium temperature operating echo processors to room-temperature operating echo processors. The elaboration of the problem concerned will enable to widely extend the application area of photon echo based data processing systems. Finally, attempts are supposed to provide theoretical investigation of photon echo and superradiance in nano-objects in view of revealing new advanced data carriers integrating optical data processing devices with conventional semiconducting ones.

Expected results.

  1. Methods of photon echo based channel pision in optical memory will be designed; multi-channel optical memory with code-channel pision in rare-earth ion-doped impurity crystals will be realized.
  2. Feasibility of associative information selection in a photon-echo mode using noise-like signals as a key, the possibility of coherent detection and the signal routing in a multi-channel photon-echo mode will be theoretically and experimentally studied.
  3. Peculiarities of different modes of coherence transfer and phase memory in the conditions of photon-echo and optical superradiance in multilevel superradiant media will be experimentally and theoretically investigated. Methods of signal transformation from one type of frequency ranges to others in photon-echo and superradiance modes, and techniques of time compression of phase modulated pulses in a three-level photon-echo mode will be developed.
  4. Peculiarities of excitation of femtosecond photon-echo signals in dopant polymer films at room temperature and possibilities of using phase code methods in a three-level photon echo mode will be investigated experimentally and theoretically.
  5. Code-channel pision methods in quantum optical communication systems will be developed. Preparation of phase modulated biphotons, their coherent detection, and also the peculiarities of their propagation over optical fiber communication lines will be investigated.
  6. Peculiarities of photon echo and superradiance in doped nanocrystals and possibilities of observation of long-lived photon echo in nanoobjects will be investigated.
  7. Fundamental properties such as emergence of quantum correlations in systems of impurity atoms and photons as well as stochastisation of stimulated emission, which accompany the collective relaxation of excited states in superradiant media, will be studied.

Thus, as a result of project implementation a prerequisite for fully optical quantum devices of data processing will be created, which will provide not only high speed information transmission and distribution, but also confidentiality of multichannel transferred data. Within the framework of the project a great theoretical and experimental work will be done, which is necessary for further commercial realization of devices concerned. The elaboration of principles of designing quantum prototypes of such systems is of great fundamental importance, and will enhance not only further distribution of quantum networks, but also the development of quantum information as a whole. The realization of data processing in a femtosecond photon-echo mode at room temperatures is of great practical significance and will make an essential contribution into the development of optical information technologies. The solution of an important practical problem of transition from helium-temperature operating echo-processors to room-temperature operating echo-processors will extend the application area of photon-echo based data processing-and-storing systems.

The project implementation will enable:

  • To give scientists and experts dealing with weapon development an opportunity to reorient to peaceful purposes
  • To encourage the scientists’ integration in an international science community
  • To support fundamental and applied investigations aimed at technologies developing in peaceful purposes in the field of informatics
  • To enhance the speed and volume of the information transferred along optical communications lines, which will promote the solution of such an important problem as the Internet development

In the first year of the project implementation it is planned to develop code channel pision methods of signal conversion between various frequency ranges in a three-level photon-echo mode and under superradiance, and also to study the peculiarities of femtosecond photon echo signal excitation in dopant polymer films doped with a dye-stuff, to elaborate phase code methods and code channel pision methods in quantum communication systems by means of biphotons, to evolve the theory of irreversible relaxation of quantum states of one and more than one dopant in a nanocrystals, to work out the theory of reversible relaxation of dopants in a nanoparticle ensemble.

In the second year of the project implementation the investigation of possibilities of coherence transmission in a photon-echo mode, effects of a destructive interference in a femtosecond photon-echo mode, possibilities of coherent detecting phase-modulated biphotons, superradiance of dopant atoms in nanoparticles, photon echo of dopant atoms in nanoparticle ensemble, is supposed.

In the third year of the project implementation the investigation of possibilities of code channel pision in a stimulated photon-echo mode, of coherent enhancement of signal in a trigger superradiance mode, the development of time-compressed phase modulated signals methods in a three-level photon-echo mode, the investigation of peculiarities of propagation of phase-modulated biphotons in dispersing environments, of emergence, decay and storing quantum correlation on dopant atoms in nanocrystals, of emergence, decay and storing quantum correlations in quantum dots, are considered.

The project designers have had a long experience in experimental ant theoretical research of transient and collective optical phenomena such as photon echo and optical superradiance in solids. Experiments on photon echo will be made by means of nano-second dye lasers, femtosecond and continuous titanium-sapphire lasers, theoretical investigations will be carried out within the framework of semiclassical and totally quantum theory of coherent optical phenomena. The results of the project work, i.e. the description of the developed data processing methods and experiments done will be sent out to ISTC in the prescribed standard form of reports.


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The International Science and Technology Center (ISTC) is an intergovernmental organization connecting scientists from Kazakhstan, Armenia, Tajikistan, Kyrgyzstan, and Georgia with their peers and research organizations in the EU, Japan, Republic of Korea, Norway and the United States.

 

ISTC facilitates international science projects and assists the global scientific and business community to source and engage with CIS and Georgian institutes that develop or possess an excellence of scientific know-how.

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