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Anisotropic Flow in Fixed-Target ^{208}Pb+^{20}Ne Collisions as a Probe of Quark-Gluon Plasma.
Phys Rev Lett
February 2025
Université Paris-Saclay, IRFU, CEA, 91191 Gif-sur-Yvette, France.
The System for Measuring Overlap with Gas (SMOG2) at the LHCb detector enables the study of fixed-target ion-ion collisions at relativistic energies (sqrt[s_{NN}]∼100 GeV in the center of mass). With input from ab initio calculations of the structure of ^{16}O and ^{20}Ne, we compute 3+1D hydrodynamic predictions for the anisotropic flow of Pb+Ne and Pb+O collisions to be tested with upcoming LHCb data. This will allow the detailed study of quark-gluon plasma formation as well as experimental tests of the predicted nuclear shapes.
View Article and Find Full Text PDFEfficiently Cooling Quantum Systems with Finite Resources: Insights from Thermodynamic Geometry.
Phys Rev Lett
February 2025
Technische Universität Wien, Atominstitut, Stadionallee 2, 1020 Vienna, Austria.
Landauer's limit on heat dissipation during information erasure is critical as devices shrink, requiring optimal pure-state preparation to minimize errors. However, Nernst's third law states this demands infinite resources in energy, time, or control complexity. We address the challenge of cooling quantum systems with finite resources.
View Article and Find Full Text PDFStructural Characterization of Dimeric Perfluoroalkyl Carboxylic Acid Using Experimental and Theoretical Ion Mobility Spectrometry Analyses.
J Am Soc Mass Spectrom
March 2025
Mass Spectrometry Laboratory, MolSys Research Unit, Chemistry Department, University of Liège, Liège 4000, Belgium.
Per- and polyfluoroalkyl substances (PFAS) are contaminants of increasing concern, with over seven million compounds currently inventoried in the PubChem PFAS Tree. Recently, ion mobility spectrometry has been combined with liquid chromatography and high-resolution mass spectrometry (LC-IMS-HRMS) to assess PFAS. Interestingly, using negative electrospray ionization, perfluoroalkyl carboxylic acids (PFCAs) form homodimers ([2M-H]), a phenomenon observed with trapped, traveling wave, and drift-tube IMS.
View Article and Find Full Text PDFMultiparticle collision framework for active polar fluids.
Phys Rev E
January 2025
University of Edinburgh, School of Physics and Astronomy, The , Peter Guthrie Tait Road, Edinburgh EH9 3FD, United Kingdom.
Sufficiently dense intrinsically out-of-equilibrium suspensions, such as those observed in biological systems, can be modeled as active fluids characterized by their orientational symmetry. While mesoscale numerical approaches to active nematic fluids have been developed, polar fluids are simulated as either ensembles of microscopic self-propelled particles or continuous hydrodynamic-scale equations of motion. To better simulate active polar fluids in complex geometries or as a solvent for suspensions, mesoscale numerical approaches are needed.
View Article and Find Full Text PDFClassical scattering and fragmentation of clusters of ions in helical confinement.
Phys Rev E
January 2025
Universität Hamburg, Zentrum für Optische Quantentechnologien, Fachbereich Physik, Luruper Chaussee 149, 22761 Hamburg, Germany.
We explore the scattering dynamics of classical Coulomb-interacting clusters of ions confined to a helical geometry. Ion clusters of equally charged particles constrained to a helix can form many-body bound states; i.e.
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