Results 21 to 30 of about 1,613,220 (286)

Optimal multi-photon phase sensing with a single interference fringe [PDF]

open access: yes, 2013
Quantum entanglement can help to increase the precision of optical phase measurements beyond the shot noise limit (SNL) to the ultimate Heisenberg limit. However, the N-photon parity measurements required to achieve this optimal sensitivity are extremely
Hofmann, H. F.   +2 more
core   +2 more sources

Sub-shot-noise shadow sensing with quantum correlations [PDF]

open access: yes, 2017
The quantised nature of the electromagnetic field sets the classical limit to the sensitivity of position measurements. However, techniques based on the properties of quantum states can be exploited to accurately measure the relative displacement of a ...
Edgar, Matthew P.   +5 more
core   +1 more source

Optimizing the Limit of Detection of Waveguide-Based Interferometric Biosensor Devices

open access: yesSensors, 2019
Waveguide-based photonic sensors provide a unique combination of high sensitivity, compact size and label-free, multiplexed operation. Interferometric configurations furthermore enable a simple, fixed-wavelength read-out making them particularly suitable
Jonas Leuermann   +7 more
doaj   +1 more source

Limits of modularity maximization in community detection [PDF]

open access: yesPhysical Review E, 2011
Modularity maximization is the most popular technique for the detection of community structure in graphs. The resolution limit of the method is supposedly solvable with the introduction of modified versions of the measure, with tunable resolution parameters.
Lancichinetti, Andrea, Fortunato, Santo
openaire   +3 more sources

Detection of amplitude modulation with squeezed light for sensitivity beyond the shot-noise limit [PDF]

open access: yes, 1988
An improvement in precision beyond the limit set by the vacuum-state or zero-point fluctuations of the electromagnetic field is reported for the detection of amplitude modulation encoded on a weak signal beam. The improvement is achieved by employing the
Kimble, H. J., Wu, Ling-An, Xiao, Min
core   +1 more source

Saliva is Comparable to Nasopharyngeal Swabs for Molecular Detection of SARS-CoV-2

open access: yesMicrobiology Spectrum, 2021
The continued need for molecular testing for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and the potential for self-collected saliva as an alternative to nasopharyngeal (NP) swabs for sample acquisition led us to compare saliva to NP ...
Cody Callahan   +9 more
doaj   +1 more source

Fundamental Limitation on the Detectability of Entanglement

open access: yesPhysical Review Letters, 2022
Entanglement detection is essential in quantum information science and quantum many-body physics. It has been proved that entanglement exists almost surely for a random quantum state, while the realizations of effective entanglement criteria usually consume exponential resources, and efficient criteria often perform poorly without prior knowledge. This
Pengyu Liu   +3 more
openaire   +3 more sources

Comparing the fundamental limit of detection for interferometric and resonant biosensors with coherent phase read-out [PDF]

open access: yes, 2019
We compare the limit of detection of coherently interrograted photonic biosensors, using both interferometric and resonant architectures.Universidad de Málaga.
Halir, Robert   +4 more
core   +1 more source

Determination of atrazine residues in alfalfa plant matrix by ultra-high-performance liquid chromatography and tandem mass spectrometry

open access: yesКарантин і захист рослин
Goal. The purpose of this study was to verify the effectiveness of determination of atrazine residues in alfalfa using ultra-high-performance liquid chromatography and tandem mass spectrometry. Methods.
Yinghui Zhu, T. Rozhkova
doaj   +1 more source

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