Results 11 to 20 of about 1,712,147 (281)

Coherent versus incoherent excitation dynamics in dissipative many-body Rydberg systems [PDF]

open access: yes, 2014
We study the impact of dephasing on the excitation dynamics of a cloud of ultracold two-level Rydberg atoms for both resonant and off-resonant laser excitation, using the wave function Monte Carlo (MCWF) technique.
Evers, Jörg   +2 more
core   +2 more sources

Roundabout relaxation: collective excitation requires a detour to equilibrium [PDF]

open access: yes, 2004
Relaxation to equilibrium after strong and collective excitation is studied, by using a Hamiltonian dynamical system of one dimensional XY model. After an excitation of a domain of $K$ elements, the excitation is concentrated to fewer elements, which are
D. Escande   +8 more
core   +1 more source

Chirp excitation [PDF]

open access: yesJournal of Magnetic Resonance, 2017
The paper describes the design of broadband chirp excitation pulses in NMR. We first develop a three stage model for understanding chirp excitation in NMR. We then show how a chirp $ $ pulse can be used to refocus the phase of the chirp excitation pulse. The resulting magnetization still has some phase dispersion in it.
openaire   +3 more sources

The enigmatic function of chandelier cells

open access: yesFrontiers in Neuroscience, 2010
Chandelier (or axo-axonic) cells are one of the most distinctive GABAergic interneurons in the brain. Their exquisite target specificity for the axon initial segment of pyramidal neurons, together with their GABAergic nature, long suggested the ...
Alan R Woodruff   +2 more
doaj   +1 more source

Moving toward a Handheld “Plasma” Spectrometer for Elemental Analysis, Putting the Power of the Atom (Ion) in the Palm of Your Hand

open access: yesMolecules, 2021
Many of the current innovations in instrument design have been focused on making them smaller, more rugged, and eventually field transportable. The ultimate application is obvious, carrying the instrument to the field for real time sample analysis ...
Brian T. Buckley   +2 more
doaj   +1 more source

Momentum-resolved charge excitations in high-Tc cuprates studied by resonant inelastic x-ray scattering [PDF]

open access: yes, 2007
We report a Cu K-edge resonant inelastic x-ray scattering (RIXS) study of high-Tc cuprates. Momentum-resolved charge excitations in the CuO2 plane are examined from parent Mott insulators to carrier-doped superconductors.
Collart   +45 more
core   +1 more source

Layer Specific Development of Neocortical Pyramidal to Fast Spiking Cells Synapses.

open access: yesFrontiers in Cellular Neuroscience, 2016
All cortical neurons are engaged in inhibitory feedback loops which ensure excitation-inhibition balance and are key elements for the development of coherent network activity.
Olga eVoinova   +6 more
doaj   +1 more source

Harmonic chirp imaging method for ultrasound contrast agent [PDF]

open access: yes, 2005
Coded excitation is currently used in medical ultrasound to increase signal-to-noise ratio (SNR) and penetration depth. We propose a chirp excitation method\ud for contrast agents using the second harmonic component of the response.
Associate Member   +5 more
core   +5 more sources

Impact of Ground Current of HVDC Earth Electrode on High-speed EMU

open access: yes机车电传动, 2021
During the operation of HVDC system with the earth as the loop, the formed current  field in the ground has corrosion effect on the adjacent high-speed railway system.
Jie WU   +4 more
doaj  

Excitation Spectrum in the Friedberg-Lee Model [PDF]

open access: yes, 2001
The excitation spectrum of the nucleon with the spin 1/2 is examined by using the Friedberg-Lee model containing the constituent quark and the scalar meson. An appropriate way of quantization for the non-linear meson field is employed by taking account
Arima, M., Kowata, H.
core   +3 more sources

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