56 research outputs found
Study on crystallization phenomenon and thermal stability of binary NiâNb amorphous alloy
In this paper, a ribbon of binary NiâNb amorphous
alloy was prepared by the melt spinning technique.
Glass transition and crystallization phenomenon of the
alloy were investigated by differential scanning calorimetry.
Thermal properties of the ribbon of binary NiâNb upon
heating and cooling were analysed by DTA at a heating/
cooling rate of 0.5 K s-1 under the purified argon
atmosphere. The thermal stability of NiâNb amorphous
alloy was studied by using an X-ray diffractometer
equipped with an in situ heating system. The structure and
fracture morphology of the ribbons were examined by
X-ray diffraction and scanning electron microscopy
methods
Advances in photonic quantum sensing
Quantum sensing has become a mature and broad field. It is generally related
with the idea of using quantum resources to boost the performance of a number
of practical tasks, including the radar-like detection of faint objects, the
readout of information from optical memories or fragile physical systems, and
the optical resolution of extremely close point-like sources. Here we first
focus on the basic tools behind quantum sensing, discussing the most recent and
general formulations for the problems of quantum parameter estimation and
hypothesis testing. With this basic background in our hands, we then review
emerging applications of quantum sensing in the photonic regime both from a
theoretical and experimental point of view. Besides the state-of-the-art, we
also discuss open problems and potential next steps.Comment: Review in press on Nature Photonics. This is a preliminary version to
be updated after publication. Both manuscript and reference list will be
expande
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