Iso-vector dipole resonance and shear viscosity in low energy heavy-ion collision

Abstract

The ratio of shear viscosity over entropy density in low energy heavy-ion collision has been calculated by using the Green-Kubo method in the framework of an extended quantum molecular dynamics model. After the system almost reaching a local equilibration for a head-on ${}^{40}$Ca+${}^{100}$Mo collision, thermodynamic and transport properties are extracted. Meanwhile, iso-vector giant dipole resonance (IVGDR) of the collision system is also studied. By the Gaussian fits to the IVGDR photon spectra, the peak energies of IVGDR are extracted at different incident energies. The result shows that the IVGDR peak energy has a positive correlation with the ratio of shear viscosity over entropy density. This is a quantum effect and indicates a difference between nuclear matter and classical fluid.

7 pages, 8 figures; Physical Review C (in press)

References in corpus (10)

• Viscosity in Strongly Interacting Quantum Field Theories from Black Hole Physics
• Universal Quantum Viscosity in a Unitary Fermi Gas
• Giant Dipole Resonance as a Fingerprint of $\alpha$ Clustering Configurations in ${}^{12}$C and ${}^{16}$O
• Critical Behavior in Light Nuclear Systems: Experimental Aspects
• The shear viscosity to entropy density ratio in finite nuclei
• Shear viscosity of hot nuclear matter by the mean free path method
• Dynamical dipole $\gamma$ radiation in heavy-ion collisions on the basis of the quantum molecular dynamics model
• Correlation between elliptic flow and shear viscosity in intermediate-energy heavy-ion collisions
• Ratio of shear viscosity to entropy density in multifragmentation of Au + Au
• Giant dipole resonance in proton capture reactions using an extended quantum molecular dynamics model

Cited by in corpus (6)

• Determining the temperature in heavy-ion collisions with multiplicity distribution
• Dipole excitation of ${}^6$Li and ${}^9$Be studied with an extended quantum molecular dynamics model
• Impact of fragment formation on shear viscosity in the nuclear liquid-gas phase transition region
• Direct photon emission and influence of dynamical wave packets in an extended quantum molecular dynamics model
• Green-Kubo formula for Boltzmann and Fermi-Dirac statistics
• Isovector giant dipole resonance mode with an improved propagation approach in the framework of EQMD model