1,538 research outputs found
Cluster quantum computer on the basis of quasi-part
The present paper deals with the possibility of creation of the quantum
computer in which the role of q-bits is played by quasi-particles. In such a
computer, the elementary computation block should represent a cluster created
on the basis of the paramagnetic molecules. The latter form heterogeneous spin
states in the cluster owing to the presence of interelectron correlations.Comment: 4 page
Q-phonon description of low lying 1^- two-phonon states in spherical nuclei
The properties of 1^-_1 two-phonon states and the characteristics of E1
transition probabilities between low-lying collective states in spherical
nuclei are analysed within the Q-phonon approach to the description of
collective states. Several relations between observables are obtained.
Microscopic calculations of the E1 0^+_1 -> 1^-_1 transition matrix elements
are performed on the basis of the RPA. A satisfactory description of the
experimental data is obtained.Comment: 16 pages, 2 figures, 9 table
Description of Double Giant Dipole Resonance within the Phonon Damping Model
In a recent Letter [1] an overall agreement with the experimental data for
the excitation of the single and double giant dipole resonances in relativistic
heavy ion collision in 136Xe and 208Pb nuclei has been reported. We point out
that this agreement is achieved by a wrong calculation of the DGDR excitation
mechanism. We also argue that the agreement with the data for the widths of
resonances is achieved by an unrealistically large value of a model parameter.
[1] Nguyen Dinh Dang, Vuong Kim Au, and Akito Arima, Phys. Rev. Lett. 85
(2000) 1827.Comment: Comment for Phys. Rev. Let
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