Find in Library
Search millions of books, articles, and more
Indexed Open Access Databases
Condensons and bicondensons in one-dimensional systems
oleh: N.I. Kashirina, O.A. Korol
| Format: | Article |
|---|---|
| Diterbitkan: | National Academy of Sciences of Ukraine. Institute of Semi conductor physics. 2018-10-01 |
Deskripsi
The paper is devoted to simulation of continual strong coupling condensons and bicondensons states in one-dimensional systems by using the Gaussian basis with exponentially correlated multipliers. To determine the accuracy of variational calculations, it has been shown that using the variational function consisting of a sum of 5 Gaussians reproduces the exact value of energy and wave function of the one-dimensional condenson with the accuracy of 7 and 5 significant digits, correspondingly. Analytical expressions for the effective functional of the one-dimensional bicondenson have been obtained. Variational calculations of singlet condenson ground state energy were carried out with simultaneous accounting of single-center correlations and correlations caused by a direct dependence of the bicondenson wave function on the distance between electrons. The graphical dependence of the bicondenson energy on the Coulomb repulsion parameter V C has been represented. The region of existence of bicondenson was determined as a function of electron-electron repulsion parameter V C ≤ V C * ≈ 5 . 4 . The one-center bicondenson model has been considered, and distribution of the two-electron probability density (squared wave function of bicondenson) in the region 2 ≤ V C has two maxima, the distance between which for V C = 2 is R m = 1.8567. This distribution of the probability density is associated with the low dimensionality of the system under consideration.