A5028700547- Aquatic and Environmental Studies
- Advanced Fiber Laser Technologies
- Gas Dynamics and Kinetic Theory
- Earthquake Detection and Analysis
- Geomagnetism and Paleomagnetism Studies
- Material Science and Thermodynamics
- Differential Equations and Numerical Methods
- Ionosphere and magnetosphere dynamics
- Computational Fluid Dynamics and Aerodynamics
- Quantum Information and Cryptography
- Semiconductor Quantum Structures and Devices
- Semiconductor Lasers and Optical Devices
- Photonic and Optical Devices
- Quantum optics and atomic interactions
- Nonlinear Photonic Systems
- Quantum Mechanics and Applications
- Geotechnical and Geomechanical Engineering
- Laser-Matter Interactions and Applications
- Photorefractive and Nonlinear Optics
- Nonlinear Optical Materials Studies
- Magnetic and Electromagnetic Effects
- Methane Hydrates and Related Phenomena
- Solar and Space Plasma Dynamics
- Quantum and electron transport phenomena
- Polydiacetylene-based materials and applications
Keldysh Institute of Applied Mathematics
2015-2024
National Institute of Standards and Technology
2008-2024
University of Maryland, College Park
2011-2023
National Research Nuclear University MEPhI
2017-2020
Volgograd State Technical University
2019-2020
Prediction Systems (United States)
2020
Saint Petersburg State University of Architecture and Civil Engineering
2019
Moscow Institute of Physics and Technology
2019
The Russian Presidential Academy of National Economy and Public Administration
2019
Institute of Engineering Physics
2017
Single photons are generated from an ensemble of cold Cs atoms via the protocol Duan et al. [Nature \textbf{414}, 413 (2001)]. Conditioned upon initial detection field 1 at 852 nm, a photon in 2 894 nm is produced controlled fashion excitation stored within atomic ensemble. The single-quantum character demonstrated by violation Cauchy-Schwarz inequality, namely $w(1_{2},1_{2}|1_{1})=0.24\pm 0.05\ngeq 1$, where $w(1_{2},1_{2}|1_{1})$ describes two events $(1_{2},1_{2})$ conditioned $1_{1}$,...
We report an investigation to establish the physical mechanisms responsible for decoherence in generation of photon pairs from atomic ensembles, via protocol Duan et. al long distance quantum communication [Nature (London) 414, 413 (2001)] and present experimental techniques necessary properly control process. develop a theory model detail process experiments with magneto-optical traps. The inhomogeneous broadening ground state by trap magnetic field is identified as principal mechanism...
We report femtosecond measurements of the dispersion in nonlinear refraction and multiphoton absorption polydiacetylenes, specifically PTS [polymer poly (bis para-toluene sulfonate) 2,4-hexadiyne -1,6 diol] over spectral range 1200 to 2200 nm. Various modifications Z-scan technique were used make measurements. The refractive index coefficient ${n}_{2}$ decreased monotonically with wavelength can be reasonably extrapolated previous at 1064 It was found that multiple mechanisms contributed...
The SURA facility for generation of high power radio waves, located near the village Vasil'sursk USSR, operates between 4.5 and 9.0 MHz has a maximum effective radiated (ERP) 300 MW. Nonlinear interactions HF waves F‐layer plasma occur electromagnetic wave reflection point. Energetic electrons are accelerated out interaction regions by electrostatic waves. Ambient oxygen atoms collisionally excited these suprathermal yield enhanced airglow. Low‐light‐level, optical measurements were made at...
We demonstrate interference between discrete photons emitted by two different semiconductor quantum dots and quantify their degree of indistinguishability. The dot emission energies are tuned into resonance straining the samples. Upon on a beamsplitter, shown to be 18.1% indistinguishable, resulting in coincidence detection rate below classical limit. Post-selecting only those detections occurring within short time each other increases measured indistinguishability 47%. partially...
We report the measurement of instantaneous resonant four-photon absorption in polydiacetylene-PTS [polymer poly(bis para-toluene sulfonate) 2,4-hexadyine-1,6 diol]. Although normally too weak to be observable, an exact degeneracy between three- and into dominant exciton two-photon states, respectively, resonantly enhances this effect so that it can measured (four-photon coefficient ${\ensuremath{\alpha}}_{4}=0.01\text{ }{\mathrm{c}\mathrm{m}}^{5}/{\mathrm{G}\mathrm{W}}^{3}$) at its peak...
The time dependence of nonclassical correlations is investigated for two fields $(1,2)$ generated by an ensemble cold cesium atoms via the protocol Duan et al. [Nature (London) 414, 413 (2001)]. correlation function $R({t}_{1},{t}_{2})$ ratio cross to autocorrelations at times $({t}_{1},{t}_{2})$ found have a maximum value ${R}^{\mathrm{max}}=292\ifmmode\pm\else\textpm\fi{}57$, which significantly violates Cauchy-Schwarz inequality $R\ensuremath{\le}1$ classical fields. Decoherence quantum...
Observation of spatial VLF field structures in an artificially disturbed ionosphere is reported. The area with horizontal sizes ∼50 km a quiet middle‐latitude was produced by the powerful RF Sura heating facility (56°1′N, 46°1′E). Measurements were carried out onboard DEMETER satellite while passing at height ∼700 km. Spectra broadening (Δ f < ±1 kHz) and considerable (up to 30 dB) increase signal intensity transmitters' signals observed. electron density irregularities have similar...
In a recent paper [R. Alicki and N. Van Ryn, J. Phys. A: Math. Theor., 41, 062001 (2008)] test of nonclassicality for single qubit was proposed. Here, we discuss the class hidden variables theories to which this applies present an experimental realization.
We investigate the distribution of electron density and potential in a quantum wire coupled to reservoirs, treating this structure as unified system taking into account Coulomb interaction electrons. The chemical difference that exists between decoupled, isolated reservoirs gives rise charge transfer system. show can be charged positively or negatively remain neutral whole, depending on such factors radius background wire. magnitude its sign are large extent determined by exchange electrons...
Stationary quadratic solitons associated with second harmonic generation in optically anisotropic media have been investigated both numerically and analytically using the variational approach. The were found to elliptical shapes, for fundamental harmonic, their approximate beam waists amplitudes as a function of anisotropy soliton parameter found. important limits diffraction compared well-known model isotropic diffraction. stability was addressed via Vakhitov-Kolokolov criterion regions...