Center «Quantum optics and quantum informatics»

Scientific adviser: Kilin Sergey Yakovlevich, Academician, Deputy Chairman of the Presidium of the National Academy of Sciences of Belarus

Main areas of research:

quantum optics (compressed and other nonclassical states of light, single atoms and molecules in various media, quantum fluctuations of laser radiation)
quantum informatics and quantum cryptography
quantum computers
control of stochastic processes in laser systems
The most important results:

the existence of a number of new physical phenomena in single quantum systems (single atoms in resonators and traps, single molecules and color centers in crystals) was proved: monatomic phase bistability, quantum instability of the dipole moment of atoms, suppression of quantum dynamic tunneling by low-intensity laser radiation; developed a theory of coherent phenomena for single molecules and spins

a quantum state engineering method has been developed that allows the creation of Fock and other nonclassical states of light based on unitary transformations realized by nonlinear optics methods; The theory of continuous quantum measurements (quantum jumps) was developed, which has been used to analyze photodetection of squeezed light states and in the field of single molecule spectroscopy

the phenomenon of freezing of spontaneous emission of atoms in the presence of a dip in the spectrum of interaction constants with a reservoir, for example, with a photonic crystal, is predicted; the possibility of zero group velocity dispersion in optical fibers based on photonic crystals is predicted; effective methods for calculating nonlinear optical processes in one-dimensional nonlinear photonic crystals during the propagation of femtosecond pulses are developed

proposed an active method for solving a problem that represents one of the main obstacles to the creation of quantum computers — the problem of decoherence, based on the use of electro-optical feedback; A new scheme and protocol for quantum teleportation of states of a single-mode optical field has been developed; A new method for creating a solid-state quantum processor based on the spin states of the nuclei in the immediate vicinity of the NV center in diamond has been proposed.

methods of numerical analysis and control of ultrafast molecular dynamics induced by shaped pulses were developed.