Atomic systems preparation

Fig. 4.13. 3(t limit of detection [atoms surface preparation system (WSPS) for... 

Fair and Thrush have recently reported a rate coefficient of (1.0 + 0.2)x 10 P.mole. sec near room temperature for the recombination of sulfur atoms in the presence of Ar. Ground-state sulfur atoms were prepared in a fast flow system by the reactions... 

The polyoxaferrocenophanes 5 a —e have been extended to include sulfur and nitrogen as the heteroatoms in the macrocyclic ring system. Thus compounds of type 7 containing one sulfur atom were prepared in modest yields by using sodium sulfide in dimethylformamide (DMF) to cyclize l,l -bis-(cD-chloropolyethyleneoxy)-ferrocene 6a —c [25]. 

A number of theoretical methods have been proposed to prepare a two-atom system in an entangled state [26-29,31-34], and two-atom entangled states have... 

We now consider excitation and population transfer processes that can lead to a preparation of the two-atom system in one of the collective states. In particular, we will focus on processes that can prepare the two-atom system in the... 

It has been shown [31] that a system of two identical two-level atoms may be prepared in the symmetric state s) by a short laser pulse. The conditions for a selective excitation of the collective atomic states can be analyzed from the interaction Hamiltonian of the laser field with the two-atom system. We make the unitary transformation... 

Guo and Yang [53] have analyzed spontaneous decay from two atoms initially prepared in an entangled state. They have shown that the time evolution of the population inversion, which is proportional to the intensity (87), depends on the degree of entanglement of the initial state of the system. Ficek et al. [10] have shown that in the case of two nonidentical atoms, the time evolution of the intensity 7(R, t) can exhibit quantum beats that result from the presence of correlations between the symmetric and antisymmetric states. In fact, quantum beats are present only if initially the system is in a nonmaximally entangled state, and no quantum beats are predicted for maximally entangled as well as unentangled states. 

Here, we discuss a method of preparing a two atom system in entangled states involving only the double atomic ground g) and excited e) states... 

Certainly, novel numerical methods [115-120] have to be further developed to treat the confined model systems which include multiple electrons and/or atoms under a wider variety of boundary conditions and symmetry. While confined systems present many computational problems not found in free systems, systems prepared under controlled confinement will continue to have their own virtues. 

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