arXiv subjects

C. Makait

Publications and source records attributed to C. Makait.

3 recordsLinked to original sources

arXiv2026

Quantum effects in plasmas

The year 2025 had been designated by UNESCO as the International Year of Quantum Science and Technology. 125 years ago Max Planck's discovery of radiation quanta started the quantum era and 100 years ago quantum mechanics was discovered by Schroedinger, Heisenberg, Bohr, Pauli, Dirac, Born, Fermi and many others. By now, quantum mechanics is the theoretical foundation of most fields of physics and chemistry, and it is the basis for modern nanotechnology. How about plasma physics? How important are quantum effects in plasmas? In what experiments quantum effects are observed and where do they govern the behavior of plasmas? How can these effects be treated theoretically and via computer simulations? Starting with a brief historical overview we discuss the broad parameter range that is characteristic for plasmas and outline where quantum effects are relevant. This is the case primarily for warm dense matter and inertial fusion plasmas. We provide an overview on the theoretical quantum methods that are available for these dense plasmas and how their respective advantages can be combined in order to achieve predictive capability. The key is a downfolding approach that is based on first principles simulations.

physics.plasm-ph↗

arXiv2025

Non-Markovian quantum kinetic simulations of uniform dense plasmas: mitigating the aliasing problem

Dense quantum plasmas out of equilibrium are successfully modeled using quantum kinetic equations, such as the quantum Boltzmann, Landau or Balescu-Lenard equation. However, these equations do not properly take into account correlation effects which requires to use generalized non-Markovian kinetic equations. While the latter have been successful for lattice models, applications to continuous systems such as plasmas are severely hampered by aliasing effects. Here we present a strategy how to suppress aliasing and make applications of non-Makrovian quantum kinetic equations to plasmas possible.

physics.plasm-ph↗

arXiv2023

Time-dependent charged particle stopping in quantum plasmas: testing the G1-G2 scheme for quasi-one-dimensional systems

Warm dense matter--an exotic, highly compressed state on the boarder between solid and plasma phases is of high current interest, in particular for compact astrophysical objects, high pressure laboratory systems, and inertial confinement fusion. For many applications the interaction of quantum plasmas with energetic particles is crucial. Moreover, often the system is driven far out of equilibrium. In that case, there is high interest in time-dependent simulations to understand the physics, in particular, during thermalization. Recently a novel many-particle technique, the G1--G2 scheme was presented [N. Schlünzen et al., Phys. Rev. Lett. \textbf{124}, 076601 (2020)] which allows for first-principle simulations of the time evolution of interacting quantum systems. Here we apply this scheme to a spatially uniform dense quantum plasma (jellium) and explore its performance. To this end the G1-G2 scheme is transformed into momentum representation, and first results are presented for a quasi-one-dimensional model system.

physics.plasm-ph↗