Stopping power of a quantum plasma — T-matrix approximation and dynamical screening

1996 ◽  
Vol 222 (4) ◽  
pp. 241-245 ◽  
Author(s):  
D.O Gericke ◽  
M Schlanges ◽  
W.D Kraeft
Keyword(s):  
Stopping Power ◽  
Quantum Plasma ◽  
Matrix Approximation ◽  
T Matrix ◽  
Dynamical Screening

scholarly journals T-matrix Approximation of the Stopping Power

1997 ◽  
Vol 15 (4) ◽  
pp. 523-531 ◽  
Author(s):  
D.O. Gericke ◽  
M. Schlanges ◽  
W.D. Kraeft
Keyword(s):  
Cross Sections ◽  
Electron Gas ◽  
Weak Coupling Limit ◽  
Phase Shift Analysis ◽  
Stopping Power ◽  
Matrix Approximation ◽  
Shift Analysis ◽  
Scattering Phase ◽  
T Matrix ◽  
Dynamical Screening

An expression for the stopping power is derived in the quantum T-matrix approximation. The transport cross sections needed for a numerical evaluation are calculated using a scattering phase-shift analysis. Numerical results are given for the stopping power of an electron beam running into an electron gas. The temperature and density dependencies of the stopping power are discussed. Finally, dynamical screening is included in the weak coupling limit according to a kinetic equation proposed by H.A. Gould and H.E. DeWitt.

Momentum distribution and the universal contact of a unitary Fermi gas with particle-hole fluctuation

2018 ◽  
Vol 32 (21) ◽  
pp. 1850249 ◽  
Author(s):  
Xiao-Xia Ruan ◽  
Hao Gong ◽  
Zheng-Ling Wang ◽  
Hong-Shi Zong
Keyword(s):  
Experimental Data ◽  
Momentum Distribution ◽  
Fermi Gas ◽  
Normal Phase ◽  
Large Momentum ◽  
Matrix Approximation ◽  
Self Consistent ◽  
Theoretical Predictions ◽  
Unitary Fermi Gas ◽  
T Matrix

We compute the momentum distribution of a homogeneous Fermi gas at unitarity in the normal phase within the framework of the non-self-consistent T-matrix approximation with particle-hole fluctuation. From the large-momentum behavior of momentum distribution, we obtain the contact for the unitary Fermi gas. We also compare our results with experimental data and other theoretical predictions.

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