Персона:
Воронова, Нина Сергеевна

Организационные подразделения

Организационная единица

Институт лазерных и плазменных технологий

Стратегическая цель Института ЛаПлаз – стать ведущей научной школой и ядром развития инноваций по лазерным, плазменным, радиационным и ускорительным технологиям, с уникальными образовательными программами, востребованными на российском и мировом рынке образовательных услуг.

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Воронова

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Нина Сергеевна

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Теперь показываю 1 - 9 из 9

Только метаданные
Photonic engineering providing conditions for direct exciton macroscopic coherence at elevated temperatures
(2019) Kurbakov, I. L.; Lozovik, Y. E.; Voronova, N. S.; Воронова, Нина Сергеевна
© 2019 SPIE. The possibility to observe a macroscopically coherent state in a gas of two-dimensional direct excitons at temperatures up to tens of Kelvin is described. The dramatic increase of the exciton lifetime allowing effective thermalization is predicted for the o-resonant cavities that strongly suppress exciton recombination. The material systems considered are single GaAs quantum wells of different thicknesses and a transition metal dichalcogenide monolayer, embedded in a layered medium with subwavelength period. The quantum hydrodynamic approach combined with the Bogoliubov description yield the one-body density matrix of the system. Employing the Kosterlitz-Thouless "dielectric screening" problem to account for vortices, we obtain the superfluid and the condensate densities and the critical temperature of the Berezinskii-Kosterlitz-Thouless crossover, for all geometries in consideration. Experimentally observable many fold increase of the photoluminescence intensity from the structure as it is cooled below the critical temperature is predicted.
Только метаданные
Anisotropic Superfluidity in a Weakly Interacting Condensate of Quasi-2D Photons
(2019) Lozovik, Y. E.; Voronova, N. S.; Воронова, Нина Сергеевна
© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim The anisotropic superfluidity in a weakly interacting two-dimensional Bose gas of photons in a dye-filled optical microcavity is investigated, taking into account the dependence of the photon effective mass on the in-plane coordinate. With the use of the generalized Gross–Pitaevskii equation and the Bogoliubov approach, it is shown that the modulation of the microcavity width leads to an effective periodic potential and the periodicity of the condensate wave function, and both the condensate energy and the spectrum of elementary excitations depend on the direction of motion. The anisotropic character of the dynamical and superfluid properties, such as helicity modulus, superfluid density, and sound velocity, as well as experimentally observable manifestations of their anisotropy are described.
Только метаданные
Finite-temperature Hartree-Fock-Bogoliubov theory for exciton-polaritons
(2021) Grudinina, A. M.; Kurbakov, I. L.; Lozovik, Y. E.; Voronova, N. S.; Грудинина, Анна Михайловна; Воронова, Нина Сергеевна
Microcavity exciton-polaritons, known to exhibit nonequilibrium Bose condensation at high critical temperatures, can also be brought in thermal equilibrium with the surrounding medium and form a quantum degenerate Bose-Einstein distribution. It happens when their thermalization time in the regime of positive detunings-or, alternatively, for high-finesse microcavities-becomes shorter than their lifetime. Here we present the self-consistent finite-temperature Hartree-Fock-Bogoliubov description for such a system of polaritons, universally addressing the excitation spectrum, momentum-dependent interactions, condensate depletion, and the background population of dark excitons that contribute to the system's chemical potential. Employing the derived expressions, we discuss the implications for the Bogoliubov sound velocity, confirmed by existing experiments, and define the critical temperatures of (quasi)condensation and the integral particle lifetime dependencies on the detuning. Large positive detunings are shown to provide conditions for the total lifetime reaching nanosecond timescales. This allows realization of thermodynamically equilibrium polariton systems with Bose-Einstein condensate forming at temperatures as high as tens of Kelvin.
Только метаданные
Dark and thermal reservoir contributions to polariton sound velocity
(2022) Grudinina, A. M.; Voronova, N. S.; Грудинина, Анна Михайловна; Воронова, Нина Сергеевна
Только метаданные
Tunable Bose-Einstein condensation and rotonlike excitation spectra with dipolar exciton-polaritons in crossed fields
(2023) Maximov, T. V.; Kurbakov, I. L.; Voronova, N. S.; Lozovik, Y. E.; Воронова, Нина Сергеевна
Только метаданные
Coupled system of electrons and exciton-polaritons: Screening, dynamical effects, and superconductivity
(2023) Plyashechnik, A. S.; Sokolik, A. A.; Voronova, N. S.; Lozovik, Y. E.; Воронова, Нина Сергеевна
Только метаданные
Coupled quantum vortex kinematics and Berry curvature in real space
(2023) Dominici, L.; Rahmani, A.; Colas, D.; Ballarini, D.; Voronova, N. S.; Воронова, Нина Сергеевна
Только метаданные
Spatially-indirect and hybrid exciton-exciton interaction in MoS2 homobilayers
(2024) Maslova, V. A.; Voronova, N. S.; Маслова, Валерия Александровна; Воронова, Нина Сергеевна
Только метаданные
Path integral approach to bosonization and nonlinearities in exciton-polariton systems
(2024) Grudinina, A.; Voronova, N. S.; Грудинина, Анна Михайловна; Воронова, Нина Сергеевна