Scattering length scaling rules for atom-atom-anion three-body recombination of zero-energy 4He4He6Li- system

2021 ◽  
Author(s):  
Bin-Bin Wang
Keyword(s):  
Scattering Length ◽  
Zero Energy ◽  
Energy Limit ◽  
System P ◽  
Three Body ◽  
Length Scaling ◽  
Body Recombination

The scattering length scaling rules for three-body recombination (TBR) of the 4He4He6Li- system in the zero-energy limit (E→0) are investigated by considering various post-Born-Oppenheimer (post-BO) contributions to the standard BO...

scholarly journals Three-body Recombination in Bose Gases with Large Scattering Length

2000 ◽  
Vol 85 (5) ◽  
pp. 908-911 ◽  
Author(s):  
P. F. Bedaque ◽  
Eric Braaten ◽  
H.-W. Hammer
Keyword(s):  
Scattering Length ◽  
Bose Gases ◽  
Three Body ◽  
Body Recombination

scholarly journals Asymmetric Lineshapes of Efimov Resonances in Mass-Imbalanced Ultracold Gases

Atoms ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 110
Author(s):  
Panagiotis Giannakeas ◽  
Chris H. Greene
Keyword(s):  
Asymmetry Parameter ◽  
Classical Method ◽  
Closed Form Expression ◽  
Ultracold Gases ◽  
Energy Limit ◽  
Reversal Effect ◽  
Zero Range ◽  
Scattering Lengths ◽  
Three Body ◽  
Body Recombination

The resonant profile of the rate coefficient for three-body recombination into a shallow dimer is investigated for mass-imbalanced systems. In the low-energy limit, three atoms collide with zero-range interactions, in a regime where the scattering lengths of the heavy–heavy and the heavy–light subsystems are positive and negative, respectively. For this physical system, the adiabatic hyperspherical representation is combined with a fully semi-classical method and we show that the shallow dimer recombination spectra display an asymmetric lineshape that originates from the coexistence of Efimov resonances with Stückelberg interference minima. These asymmetric lineshapes are quantified utilizing the Fano profile formula. In particular, a closed-form expression is derived that describes the width of the corresponding Efimov resonances and the Fano lineshape asymmetry parameter q. The profile of Efimov resonances exhibits a q-reversal effect as the inter- and intra-species scattering lengths vary. In the case of a diverging asymmetry parameter, i.e., |q|→∞, we show that the Efimov resonances possess zero width and are fully decoupled from the three-body and atom–dimer continua, and the corresponding Efimov metastable states behave as bound levels.

scholarly journals Three-body recombination calculations with a two-body mapped grid method

2021 ◽  
Vol 103 (3) ◽  
Author(s):  
T. Secker ◽  
J.-L. Li ◽  
P. M. A. Mestrom ◽  
S. J. J. M. F. Kokkelmans
Keyword(s):  
Grid Method ◽  
Three Body ◽  
Body Recombination

scholarly journals Atomic-state-dependent screening model for hot and warm dense plasmas

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Fuyang Zhou ◽  
Yizhi Qu ◽  
Junwen Gao ◽  
Yulong Ma ◽  
Yong Wu ◽  
...  
Keyword(s):  
Radiation Transport ◽  
Atomic State ◽  
Many Body ◽  
Dense Plasmas ◽  
Screening Model ◽  
State Dependent ◽  
Recombination Processes ◽  
Three Body ◽  
Many Body Interactions ◽  
Body Recombination

AbstractAn ion embedded in warm/hot dense plasmas will greatly alter its microscopic structure and dynamics, as well as the macroscopic radiation transport properties of the plasmas, due to complicated many-body interactions with surrounding particles. Accurate theoretically modeling of such kind of quantum many-body interactions is essential but very challenging. In this work, we propose an atomic-state-dependent screening model for treating the plasmas with a wide range of temperatures and densities, in which the contributions of three-body recombination processes are included. We show that the electron distributions around an ion are strongly correlated with the ionic state studied due to the contributions of three-body recombination processes. The feasibility and validation of the proposed model are demonstrated by reproducing the experimental result of the line-shift of hot-dense plasmas as well as the classical molecular dynamic simulations of moderately coupled ultra-cold neutral plasmas. Our work opens a promising way to treat the screening effect of hot and warm dense plasma, which is a bottleneck of those extensive studies in high-energy-density physics, such as atomic processes in plasma, plasma spectra and radiation transport properties, among others.

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