62) The real system׳s pair density is modeled as the uncorrelated value plus a correction: (3)Γ(r→1,r→2)=12ρ(r→1)(ρ(r→2)+hXC(r→1,r→2)) The electron repulsion energy becomes the uncorrelated (Hartree) term, plus an exchange-correlation density functional (XC functional)...
From left to right: a beam of negative astatine ions (blue circles) is guided into GANDALPH49,50, where the ion beam is overlapped with a frequency tuneable laser beam (red line) in the interaction region in either co- or counter-propagating geometry. By absorbing a photon (Inset 1), ...
One cannot turn this model around and argue that the observation of a certain geometry demonstrates the existence of the electron pairs. Besides, such circularism begs the question as to what the electron pair is.doi:10.1007/978-94-009-2853-4_4R. F. W. Bader...
We find that the geometry explored here always leads to the successful formation of quantum dots, regardless of the local roughness profile. This is consistent with the yield of measurable quantum dots – all devices with functional gate electrodes (as determined by their influence on the charge-s...
The model geometries include a geometry with regular hexagonal arene rings (with C–C bondlength of 1.395 Å) and a pair of geometries subject to cis- and trans-type Peierls distortion; see the SI for more detail. In the following, only the results obtained for the optimized geometries ...
- 《International Journal of Quantum Chemistry》 被引量: 58发表: 2004年 On the Quantum Kinetic Approach and the Scattering Approach to Vacuum Pair Production For Schwinger pair production with background electric fields varying only in time, it is shown that the quantum kinetic approach, based on...
This very simple approach, which is widely used in Organic Chemistry nowadays, was employed in the 1950s to establish important organic reactivity models such as the Frontier Molecular Orbital (FMO) theory [17] for the study of the reactivity in Organic Chemistry [18]. Molecular geometry ...
Emission properties were probed in diode arrangements with parallel-plate field geometry; the field was produced in gaps of d = 0.6 mm width between each specimen and an opposite molybdenum cylindrical flat-top anode. The spacers used to set the gaps’ width were removed before evacuation of ...
Answer and Explanation:1 In a metal, the atoms are bonded together via the metallic bond, which is different from the 'ionic' or 'covalent' bond of other compounds. The model... Learn more about this topic: Metallic Bonding | Definition, Models & Properties ...
If there is a neutron close enough (neutrons consist of two quarks) then the remaining third particle can join in a reaction with the binary pair of quarks to form a triad, and thus stability and the total overall lowering of the system energy. The proton has become a neutron and the ...