Search Publications
Improved bounds on collapse models from rotational noise of the Laser Interferometer Space Antenna Pathfinder mission
Carlesso, Matteo; Vinante, Andrea; Altamura, Davide Giordano Ario
We study spontaneous wave-function collapse models, which modify the Schrödinger equation with nonlinear and stochastic terms offering a solution to the quantum measurement problem. We find that constraints on the phenomenological parameters of the continuous spontaneous localization (CSL) model can be tightened using the recent analysis of the La…
Ytterbium atom interferometry for dark matter searches
Zhou, Yifan; Ranson, Rowan; Panagiotou, Michalis +1 more
We analyze the projected sensitivity of a laboratory-scale ytterbium atom interferometer to scalar, vector, and pseudoscalar dark matter signals. A frequency ratio measurement between two transitions in
Measuring chemical evolution and gravitational dependence of α using ultraviolet Fe v and Ni v transitions in white-dwarf spectra
Flambaum, V. V.; Berengut, J. C.; Ong, A.
In this paper, we present the details of the ab initio high-precision configuration interaction and many-body perturbation theory calculations that were used by Berengut [Phys. Rev. Lett.PRLTAO0031-900710.1103/PhysRevLett.111.010801 111, 010801 (2013)] to place limits on the dependence of the fine-structure constant, α, on the gravitational field …
Wavelength measurements of heliumlike 1s2s 3S1-1s2p 3P0,2 transitions in Ne8+, Na9+, Mg10+, and Si12+ emitted by solar flare plasmas
Wilhelm, K.; Curdt, W.; Landi, E. +1 more
With the Solar Ultraviolet Measurements of Emitted Radiation instrument-a high-resolution normal-incidence telescope and spectrometer on board the Solar and Heliospheric Observatory-heliumlike 1s2s 3S1-1s2p 3P0,2 transitions in the highly ionized species Ne8+, Na9+, Mg10+…
Effect of the variation of electric-dipole moments on the shape of pressure-broadened atomic spectral lines
Kielkopf, J. F.; Allard, N. F.; Royer, A. +1 more
We derive a classical path expression for a pressure-broadened atomic spectral line shape that allows for an electric-dipole moment that is dependent on the position of perturbers. The theory is applied to the atomic hydrogen Lyman-α and Lyman-β lines broadened by collisions with neutral and ionized atomic hydrogen. The far wings of the Lyman seri…