Results 41 to 50 of about 1,684,562 (352)

Optimal entrainment of circadian clocks in the presence of noise

, 2017
Circadian clocks are biochemical oscillators that allow organisms to estimate the time of the day. These oscillators are inherently noisy due to the discrete nature of the reactants and the stochastic character of their interactions.
Lubensky, David K., Monti, Michele, Wolde, Pieter Rein ten   +2 more
core   +1 more source

Competitive stochastic noises in coherently driven two-level atoms and quantum interference [PDF]

, 2003
A system of coherently-driven two-level atoms is analyzed in presence of two independent stochastic perturbations: one due to collisions and a second one due to phase fluctuations of the driving field. The behaviour of the quantum interference induced by
A Karpati, Agarwal G S, Agarwal G S, Alzetta G, Arimondo E, Cardimona D A, Carmichael H J, Dalibard J, Dum R, Eberly J H, Elliott D S, Gardiner C W, Garraway B M, Gawlik W, Grynberg G, Harris S E, Imamoglu A, J Janszky, Kimble H J, Knight P L, Mandel P, Mollow B R, P Adam, Plenio M B, Prior Y, Scully M O, Scully M O, Toor A H, Toor A H, W Gawlik, Wilson-Gordon A D, Xia H R, Zhou P, Zhou P, Zhou P, Zhu S Y, Zhu S Y, Zhu S Y   +37 more
core   +2 more sources

Discrete-Time Models and Performance of Phase Noise Channels

IEEE Open Journal of the Communications Society
This paper deals with the phase noise affecting communication systems, where local oscillators are employed to obtain reference signals for carrier and timing synchronizations. The most common discrete-time phase noise channel model is analyzed, with the
Amina Piemontese, Giulio Colavolpe, Thomas Eriksson   +2 more
doaj   +1 more source

Relation Between Delay Line Phase Noise and Ring Oscillator Phase Noise [PDF]

IEEE Journal of Solid-State Circuits, 2014
The phase noise of a ring oscillator can be obtained by multiplying its open-loop phase noise by a simple shaping function. The shaping function is computed using first principles and is applicable to both flicker-noise-induced and white-noise-induced phase noise, leading to compact equations for ring oscillators.
Aliakbar Homayoun, Behzad Razavi
openaire   +1 more source

Phase noise due to vibrations in Mach-Zehnder atom interferometers

, 2006
Atom interferometers are very sensitive to accelerations and rotations. This property, which has some very interesting applications, induces a deleterious phase noise due to the seismic noise of the laboratory and this phase noise is sufficiently large ...
Büchner, M., Jacquey, M., Miffre, A., Trénec, G., Vigué, J.   +4 more
core   +3 more sources

Temporal evolution of photorefractive double phase-conjugate mirrors [PDF]

, 1993
We present wave-optics calculations of the temporal and spatial evolution from random noise of a double phase-conjugate mirror in photorefractive media that show its image exchange and phase-reversal properties.
Engin, Doruk, Segev, Mordechai, Valley, George C., Yariv, Amnon   +3 more
core   +1 more source

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

FEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source

Frequency and temperature control for complex system engineering in optoelectronics and electronics: an overview

International Journal for Simulation and Multidisciplinary Design Optimization, 2020
To take advantage of the physical principles of determining parameters, such as frequency stability, noise and also alignment of optical signals, it is necessary to control complex systems.
Salzenstein Patrice
doaj   +1 more source

Spectral Weighting Functions for Single-symbol Phase-noise Specifications in OFDM Systems [PDF]

, 2003
For the specification of phase-noise requirements for the front-end of a HiperLAN/2 system we investigated available literature on the subject. Literature differed in several aspects.
Hoeksema, Fokke, Schiphorst, Roel, Slump, Kees   +2 more
core   +2 more sources

Noise-induced synchronization for phase turbulence

, 2003
Phase turbulence is suppressed by applying common noise additively to the Kuramoto-Sivashinsky type equation, and the noise-induced phase synchronization is realized.
Fujii, Gammaitoni, Gluckman, Hidetsugu Sakaguchi, Kuramoto, Matsumoto, McNamara, Mritan, Sakaguchi, Sakaguchi, Sakaguchi, Sakaguchi, Shinomoto, Stratonovich, Takayasu, Zhou, Zhou   +16 more
core   +1 more source