|
Horvat, S., Magas, V. K., Strottman, D. D., & Csernai, L. P. (2010). Entropy development in ideal relativistic fluid dynamics with the Bag Model equation of state. Phys. Lett. B, 692(4), 277–280.
Abstract: We consider an idealized situation where the Quark-Gluon Plasma (QGP) is described by a perfect, (3 + 1)-dimensional fluid dynamic model starting from an initial state and expanding until a final state where freeze-out and/or hadronization takes place. We study the entropy production with attention to effects of (i) numerical viscosity, (ii) late stages of flow where the Bag Constant and the partonic pressure are becoming similar, (iii) and the consequences of final freeze-out and constituent quark matter formation.
|
|
|
Martin-Luna, P., Bonatto, A., Bontoiu, C., Lei, B. F., Xia, G. X., & Resta-Lopez, J. (2025). Wakefield excitation and stopping power in multi-walled carbon nanotubes: one- and two-fluid model. J. Phys. D, 58(22), 225203–15pp.
Abstract: The motion of charged particles along multi-walled carbon nanotubes (MWCNTs) can induce electromagnetic modes. This wake effect represents an innovative approach for short-wavelength, high-gradient particle acceleration and for producing brilliant radiation sources. This article examines the excitation of wakefields produced by a point-like charge moving parallel to MWCNTs using the linearized hydrodynamic theory. General expressions for the excited longitudinal and transverse wakefields and the stopping power have been derived, relating them to the resonant wavenumbers obtainable from the dispersion relations under the assumption of negligible friction. As the number of walls in MWCNTs increases, they exhibit a richer spectrum of plasmonic excitations, which has been widely studied as a function of the driver velocity in this manuscript. This comprehensive study provides a deeper understanding of the physical phenomena behind plasmonic excitations in MWCNTs, paving the way for potential applications in particle acceleration, nanotechnology, and materials science.
|
|