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Erratum: Evolution of structure functions in momentum space.
Eur Phys J C Part Fields
January 2025
University of Jyvaskyla, Department of Physics, P.O. Box 35, FI-40014 University of Jyvaskyla, Finland.
[This corrects the article DOI: 10.1140/epjc/s10052-023-12365-2.].
View Article and Find Full Text PDFExperimental Particle Production in Time-Dependent Spacetimes: A One-Dimensional Scattering Problem.
Phys Rev Lett
December 2024
Universität Heidelberg, Kirchhoff-Institut für Physik, Im Neuenheimer Feld 227, 69120 Heidelberg, Germany.
We experimentally study cosmological particle production in a two-dimensional Bose-Einstein condensate, whose density excitations map to an analog cosmology. The expansion of spacetime is realized with tunable interactions. The particle spectrum can be understood through an analogy to quantum mechanical scattering, in which the dynamics of the spacetime metric determine the shape of the scattering potential.
View Article and Find Full Text PDFMolecular Angular Momentum Orientation Using Dressed States Created by Laser Radiation.
Phys Rev Lett
December 2024
Temple University, Department of Physics, Philadelphia, Pennsylvania 19122, USA.
We have produced state selective molecular angular momentum orientation using dressed states created by a cw optical field. The experiment was carried out with Li_{2} molecules and a combination of left- and right-hand circularly polarized lasers. Our approach exploits the dependence of the Rabi frequency on the quantum number M, which makes it possible to achieve complete M-state selectivity and thus molecular angular momentum orientation relative to laboratory frame space-fixed axes.
View Article and Find Full Text PDFDynamic control of bound states in the continuum (BICs) is usually achieved by engineering structural geometries of lossless optical systems, leading to a passive nature for most current BIC devices. Introducing materials with tunable permittivity, i.e.
View Article and Find Full Text PDFSilicon nitride (SiN) integrated photonics is a highly promising platform for photonic quantum information processing. However, the efficient generation of single photons remains a significant challenge. Epitaxial InAs/GaAs quantum dots (QDs) embedded in wavelength-scale nanocavities offer a promising solution as single-photon sources (SPSs), but their integration with SiN has not yet been demonstrated.
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