Neutrons detect elusive Higgs amplitude mode in quantum material

A team led by the Department of Energy's Oak Ridge National Laboratory has used sophisticated neutron scattering techniques to detect an elusive quantum state known as the Higgs amplitude mode in a two-dimensional material.

Bats adapt their echolocation calls to noise

Bats find their way acoustically when they are flying by using echolocation calls, often also employing them when hunting for food. A team of scientists from the Max Planck Institute for Ornithology in Seewiesen and the Ludwig-Maximilians-Universität ...

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Amplitude is the magnitude of change in the oscillating variable with each oscillation within an oscillating system. For example, sound waves in air are oscillations in atmospheric pressure and their amplitudes are proportional to the change in pressure during one oscillation. If a variable undergoes regular oscillations, and a graph of the system is drawn with the oscillating variable as the vertical axis and time as the horizontal axis, the amplitude is visually represented by the vertical distance between the extrema of the curve and the equilibrium value.

In older texts the phase is sometimes very confusingly called the amplitude.

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