Results 81 to 90 of about 1,399,436 (192)

Beat frequency quartz-enhanced photoacoustic spectroscopy for fast and calibration-free continuous trace-gas monitoring

open access: yesNature Communications, 2017
Quartz-enhanced photoacoustic spectroscopy is a sensitive gas detection method whereby radiation-induced sound waves from gas absorption are detected. Here, Wuet al. use the beat frequency between a modulated laser and a tuning fork resonance to increase
Hongpeng Wu   +9 more
doaj   +1 more source

Stability Enhanced Online Powdery Cement Raw Materials Quality Monitoring Using Laser-Induced Breakdown Spectroscopy

open access: yesIEEE Photonics Journal, 2017
Mastering the change of cement raw materials composition in real time has important significance to timely adjusting the proportion of raw materials and improving the quality of cement products.
Lei Zhang   +5 more
doaj   +1 more source

Precise Measurement of Hyperfine Structure of Cesium 7S1/2 Excited State

open access: yesApplied Sciences, 2020
We present a precise measurement of the hyperfine structure of cesium 7 S 1 / 2 excited state by employing electromagnetically induced spectroscopy (EIS) with a cesium three-level cascade ( 6 S 1 / 2 − 6 P 3 / 2 − 7 S
Yunhui He   +4 more
doaj   +1 more source

Isometries of quantum states [PDF]

open access: yesJournal of Physics A: Mathematical and General, 2002
This paper treats the isometries of metric spaces of quantum states. We consider two metrics on the set all quantum states, namely the Bures metric and the one which comes from the trace-norm. We describe all the corresponding (nonlinear) isometries and also present similar results concerning the space of all (non-normalized) density operators.
Molnár, Lajos, Timmermann, Werner
openaire   +2 more sources

Unambiguous quantum state filtering

open access: yes, 2003
In this paper, we consider the generalized measurement where one particular quantum signal is unambiguously extracted from a set of non-commutative quantum signals and the other signals are filtered out.
A. Chefles   +14 more
core   +1 more source

Quantum network teleportation for quantum information distribution and concentration

open access: yes, 2012
We investigate the schemes of quantum network teleportation for quantum information distribution and concentration which are essential in quantum cloud computation and quantum internet.
Fan, Heng   +6 more
core   +1 more source

Analysing Multiparticle Quantum States [PDF]

open access: yes, 2016
20 pages, 4 figures, prepared for proceedings of the "Quantum [Un]speakables II" conference (Vienna, 2014)
Otfried Gühne   +2 more
openaire   +2 more sources

Detecting genuine multipartite correlations in terms of the rank of coefficient matrix

open access: yes, 2012
We propose a method to detect genuine quantum correlation for arbitrary quantum state in terms of the rank of coefficient matrices associated with the pure state.
Fan, Heng, Kwek, Leong Chuan, Li, Bo
core   +1 more source

Extracting Kinetic Freeze-Out Properties in High-Energy Collisions Using a Multisource Thermal Model

open access: yesAdvances in High Energy Physics
We study the transverse momentum (pT) spectra of neutral pions and identified charged hadrons produced in proton–proton (pp), deuteron–gold (d–Au), and gold–gold (Au–Au) collisions at the center of mass energy sNN=200 GeV.
Jia-Yu Chen   +3 more
doaj   +1 more source

Utilizing Sequential Control Scheme to Stabilize Squeezed Vacuum States

open access: yesApplied Sciences, 2019
We report on a sequential control scheme to realize a steady, quasi-continuous output of squeezed vacuum states, which eliminates the influence of the seed beam on the squeezing strength. The scheme, originating from time-division multiplexing, separates
Long Tian   +7 more
doaj   +1 more source

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