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Showing 1 to 12 of 205 entries
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Tensor numerical methods in quantum chemistry: from Hartree-Fock to excitation energies.

Physical chemistry chemical physics : PCCP

Khoromskaia V, Khoromskij BN.
PMID: 26016539
Phys Chem Chem Phys. 2015 Dec 21;17(47):31491-509. doi: 10.1039/c5cp01215e.

We resume the recent successes of the grid-based tensor numerical methods and discuss their prospects in real-space electronic structure calculations. These methods, based on the low-rank representation of the multidimensional functions and integral operators, first appeared as an accurate...

Lunar cycle effects on sleep and the file drawer problem.

Current biology : CB

Cordi M, Ackermann S, Bes FW, Hartmann F, Konrad BN, Genzel L, Pawlowski M, Steiger A, Schulz H, Rasch B, Dresler M.
PMID: 24937275
Curr Biol. 2014 Jun 16;24(12):R549-R550. doi: 10.1016/j.cub.2014.05.017.

No abstract available.

An organolanthanide(iii) single-molecule magnet with an axial crystal-field: influence of the Raman process over the slow relaxation.

Chemical communications (Cambridge, England)

Long J, Shestakov BG, Liu D, Chibotaru LF, Guari Y, Cherkasov AV, Fukin GK, Trifonov AA, Larionova J.
PMID: 28401213
Chem Commun (Camb). 2017 Apr 25;53(34):4706-4709. doi: 10.1039/c7cc02213a.

Here, we report the synthesis and magnetic properties investigation of a series of new organometallic homoleptic complexes Li(DME)

Wavelength conversion of complex modulation formats in a compact SiGe waveguide.

Optics express

Ettabib MA, Lacava C, Liu Z, Bogris A, Kapsalis A, Brun M, Labeye P, Nicoletti S, Syvridis D, Richardson DJ, Petropoulos P.
PMID: 28241541
Opt Express. 2017 Feb 20;25(4):3252-3258. doi: 10.1364/OE.25.003252.

We report a nonlinear signal processing system based on a SiGe waveguide suitable for high spectral efficiency data signals. Four-wave-mixing (FWM)-based wavelength conversion of 10-Gbaud 16-Quadrature amplitude modulated (QAM) and 64-QAM signals is demonstrated with less than -10-dB conversion...

High-speed all-optical pattern recognition of dispersive Fourier images through a photonic reservoir computing subsystem.

Optics letters

Mesaritakis C, Bogris A, Kapsalis A, Syvridis D.
PMID: 26176483
Opt Lett. 2015 Jul 15;40(14):3416-9. doi: 10.1364/OL.40.003416.

In this Letter, we present and fully model a photonic scheme that allows the high-speed identification of images acquired through the dispersive Fourier technique. The proposed setup consists of a photonic reservoir-computing scheme that is based on the nonlinear...

Optical properties of waveguides fabricated in fused silica by femtosecond laser pulses.

Applied optics

Will M, Nolte S, Chichkov BN, Tünnermann A.
PMID: 12148766
Appl Opt. 2002 Jul 20;41(21):4360-4. doi: 10.1364/ao.41.004360.

With tightly focused femtosecond laser pulses, waveguides are fabricated in fused silica. The guiding and attenuation properties of these waveguides at wavelengths of 514 nm and 1.5 microm are studied. We demonstrate that by changing only the writing speed,...

Evolution of the vibrational spectrum of ammonia from single molecule to bulk.

The Journal of chemical physics

Slipchenko MN, Sartakov BG, Vilesov AF.
PMID: 18397079
J Chem Phys. 2008 Apr 07;128(13):134509. doi: 10.1063/1.2884927.

Ammonia clusters (NH3)n (n=2-10(4)) have been assembled inside helium droplets and studied via infrared laser spectroscopy. The studied spectral range of 3100-3500 cm(-1) covers the nu1 and nu3 fundamental stretching bands as well as the 2nu4 overtone of the...

Structure of a paramagnetic supermicroporous silica-based material via a multinuclear solid-state NMR monitoring.

Magnetic resonance in chemistry : MRC

Bakhmutov VI, Shpeizer BG, Clearfield A.
PMID: 17120259
Magn Reson Chem. 2007 Feb;45(2):118-22. doi: 10.1002/mrc.1927.

The paramagnetic Si/Al material doped with 19.8% (weight) of Mn2+ has been characterized by the 1H, 13C, 27Al, 29Si MAS NMR spectra and the 1H, 29Si T1MAS relaxation measurements as a gel dried at 130 degrees C and as...

Optical spectroscopy of single Si nanocylinders with magnetic and electric resonances.

Scientific reports

Evlyukhin AB, Eriksen RL, Cheng W, Beermann J, Reinhardt C, Petrov A, Prorok S, Eich M, Chichkov BN, Bozhevolnyi SI.
PMID: 24535224
Sci Rep. 2014 Feb 18;4:4126. doi: 10.1038/srep04126.

Resonant electromagnetic properties of nanoparticles fabricated from high-index semiconductor or dielectric materials are very promising for the realization of novel nanoantennas and metamaterials. In this paper we study optical resonances of Si nanocylinders located on a silica substrate. Multipole...

Towards nonlinear conversion from mid- to near-infrared wavelengths using Silicon Germanium waveguides.

Optics express

Hammani K, Ettabib MA, Bogris A, Kapsalis A, Syvridis D, Brun M, Labeye P, Nicoletti S, Petropoulos P.
PMID: 24787852
Opt Express. 2014 Apr 21;22(8):9667-74. doi: 10.1364/OE.22.009667.

We demonstrate the design, fabrication and characterization of a highly nonlinear graded-index SiGe waveguide for the conversion of mid-infrared signals to the near-infrared. Using phase-matched four-wave mixing, we report the conversion of a signal at 2.65 µm to 1.77...

Universal superfluid transition and transport properties of two-dimensional dirty bosons.

Physical review letters

Carleo G, Boéris G, Holzmann M, Sanchez-Palencia L.
PMID: 23952374
Phys Rev Lett. 2013 Aug 02;111(5):050406. doi: 10.1103/PhysRevLett.111.050406. Epub 2013 Aug 02.

We study the phase diagram of two-dimensional, interacting bosons in the presence of a correlated disorder in continuous space, by using large-scale quantum Monte Carlo simulations at finite temperature. We show that the superfluid transition is strongly protected against...

Energy parameters of the migration of the bound cation vacancies in LiF:Ba2+.

Physical review. B, Condensed matter

Bogris N, Grammatikakis J, Katsika V, Kyritsis A, Papathanassiou A.
PMID: 9999442
Phys Rev B Condens Matter. 1991 Dec 15;44(23):12686-12689. doi: 10.1103/physrevb.44.12686.

No abstract available.

Showing 1 to 12 of 205 entries