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Theory for Dissipative Time Crystals in Coupled Parametric Oscillators.
Phys Rev Lett
December 2024
University of Maryland, College Park, Joint Quantum Institute, Condensed Matter Theory Center and, Department of Physics, Maryland 20742-4111, USA.
Discrete time crystals are novel phases of matter that break the discrete time translational symmetry of a periodically driven system. In this Letter, we propose a classical system of weakly nonlinear parametrically driven coupled oscillators as a test bed to understand these phases. Such a system of parametric oscillators can be used to model period-doubling instabilities of Josephson junction arrays as well as semiconductor lasers.
View Article and Find Full Text PDFDiffusive evaporation dynamics in polymer solutions is ubiquitous.
Soft Matter
January 2025
SUPA and School of Physics and Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh EH9 3FD, UK.
Recent theory and experiments have shown how the buildup of a high-concentration polymer layer at a one-dimensional solvent-air interface can lead to an evaporation rate that scales with time as and that is insensitive to the ambient humidity. Using phase field modelling we show that this scaling law constitutes a naturally emerging robust regime, diffusion-limited evaporation (DLE). This regime dominates the dynamical state diagram of the system, which also contains regions of constant and arrested evaporation, confirming and extending understanding of recent experimental observations and theoretical predictions.
View Article and Find Full Text PDFBeyond the disclosure debate in donor-conception: how do we help families to discuss origin stories with their children?
Hum Reprod
January 2025
Department of Psychology, Universidad Alberto Hurtado, Santiago, Chile.
Families have been subject to enormous transformations with the emergence of artificial reproductive technology and the appearance of donor-conceived children. These new families are challenged to disclose origins with their children and parents feel concern that conception stories might have an emotional impact on their children. Fertility counsellors still feel ill-equipped on what to recommend to parents because developmental psychology has not designed systematic evidence-based guidelines to address a three-dimensional matter: 'what', 'when', and 'how' to discuss conception stories.
View Article and Find Full Text PDFNuance and specificity always matter-Especially for all the meanings of 'gender': A reply to Jackson and Bussey (2024).
Br J Psychol
January 2025
San Francisco State University, San Francisco, California, USA.
Jackson and Bussey (The British Journal of Psychology, 2024, 115, 723) present the provocative argument that the concept of a "true gender" is not a useful conceptual object for psychology. While the article does make 2 valid and worthwhile points, the remainder of that article lacks necessary nuance in developing its general conclusion.
View Article and Find Full Text PDFThe nuclear lamin network passively responds to both active or passive cell movement through confinements.
Soft Matter
January 2025
Laboratoire de Physique de l'École normale supérieure, ENS, Université PSL, CNRS, Sorbonne Université, Université Paris Cité, F-75005 Paris, France.
Physical models of cell motility rely mostly on cytoskeletal dynamical assembly. However, when cells move through the complex 3D environment of living tissues, they have to squeeze their nucleus that is stiffer than the rest of the cell. The lamin network, organised as a shell right underneath the nuclear membrane, contributes to the nuclear integrity and stiffness.
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