Volume 109, Number 1, January 2015
|Number of page(s)||5|
|Section||Physics of Gases, Plasmas and Electric Discharges|
|Published online||23 January 2015|
Fano-like anti-resonances in strongly coupled binary Coulomb systems
1 Department of Physics, Boston College - 140 Comm. Ave, Chestnut Hill, MA 02467, USA
2 Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, Hungarian Academy of Sciences H-1121 Budapest, Konkoly-Thege Miklós str. 29-33, Hungary
3 Institut für Theoretische Physik und Astrophysik - Leibnizstr. 15, 24098 Kiel, Germany
Received: 20 November 2014
Accepted: 22 December 2014
Molecular-dynamics (MD) simulations of a strongly coupled binary ionic mixture have revealed the appearance of sharp minima in the species-resolved dynamical density fluctuation spectra. This phenomenon is reminiscent of the well-known Fano anti-resonance, occurring in various physical processes. We give a theoretical analysis using the quasi-localized charge approximation, and demonstrate that the observed phenomenon in the equilibrium spectrum is a novel manifestation of the Fano mechanism, that occurs at characteristic frequencies of the system different from the conventional classical Fano frequencies.
PACS: 52.27.Gr – Strongly-coupled plasmas / 52.27.Cm – Multicomponent and negative-ion plasmas / 52.35.Fp – Electrostatic waves and oscillations (e.g., ion-acoustic waves)
© EPLA, 2015
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