Results 81 to 90 of about 519,355 (198)

Theoretical Investigation of Ultraprecise Position Determination by Spatially Modulated Low-Coherence Interference Fringe in Optical Fiber Sensing

open access: yesIEEE Photonics Journal, 2016
A position determination method for low-coherence interference fringe in optical fiber sensing is proposed. This method can be used to measure displacement or length.
Xuezhi Zhang   +6 more
doaj   +1 more source

Observation of a 2D Bose-gas: from thermal to quasi-condensate to superfluid

open access: yes, 2008
We present experimental results on a Bose gas in a quasi-2D geometry near the Berezinskii, Kosterlitz and Thouless (BKT) transition temperature. By measuring the density profile, \textit{in situ} and after time of flight, and the coherence length, we ...
A. Ramanathan   +6 more
core   +1 more source

Mesoscopic Phase Coherence in a Quantum Spin Fluid

open access: yes, 2007
Mesoscopic quantum phase coherence is important because it improves the prospects for handling quantum degrees of freedom in technology. Here we show that the development of such coherence can be monitored using magnetic neutron scattering from a one ...
Affleck   +21 more
core   +1 more source

Measurement of Atmospheric Coherence Length from a Shack–Hartmann Wavefront Sensor with Extended Sources

open access: yesPhotonics
Free Space Optical Communication (FSOC) is a wireless communication method that utilizes laser beams for high speed and secure data transmission.
Junrui Zhang   +7 more
doaj   +1 more source

CLD-shaped Brushstrokes in Non-Photorealistic Rendering

open access: yes, 2010
Rendering techniques based on a random grid can be improved by adapting brushstrokes to the shape of different areas of the original picture. In this paper, the concept of Coherence Length Diagram is applied to determine the adaptive brushstrokes, in ...
Marazzato, Roberto   +1 more
core  

Anomalous coherence length in superconductors with quantum metric

open access: yesCommunications Physics
The coherence length ξ is the fundamental length scale of superconductors which governs the sizes of Cooper pairs, vortices, Andreev bound states, and more. In BCS theory, the coherence length is ξ BCS = ℏ v F /Δ, where v F is the Fermi velocity and Δ is
Jin-Xin Hu, Shuai A. Chen, K. T. Law
doaj   +1 more source

Cross Determination of Exciton Coherence Length in J-Aggregates. [PDF]

open access: yesJ Phys Chem Lett, 2022
Jumbo-Nogales A   +5 more
europepmc   +1 more source

Spatial Coherence of a Polariton Condensate

open access: yes, 2007
We perform Young's double-slit experiment to study the spatial coherence properties of a two-dimensional dynamic condensate of semiconductor microcavity polaritons.
Glenn S. Solomon   +5 more
core   +1 more source

Coherent vs incoherent effects and Debye length

open access: yesJournal of Physics: Conference Series, 2019
Abstract For some class of studies, the space charge is treated as frozen, allowing to capture the dynamics of incoherent phenomena. We explore the possibility that a beam may exhibit non-resonant coherent behavior by developing and studying a one-dimensional model.
openaire   +1 more source

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