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Studies in Hohenberg-Kohn and Quanta...

Pan, Xiao-Yin.

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Studies in Hohenberg-Kohn and Quantal Density Functional theories.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Studies in Hohenberg-Kohn and Quantal Density Functional theories./
Author:	Pan, Xiao-Yin.
Description:	87 p.
Notes:	Source: Dissertation Abstracts International, Volume: 65-12, Section: B, page: 6445.
Contained By:	Dissertation Abstracts International65-12B.
Subject:	Physics, Condensed Matter. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3159242
ISBN:	0496921991

Studies in Hohenberg-Kohn and Quantal Density Functional theories.
Pan, Xiao-Yin.

Studies in Hohenberg-Kohn and Quantal Density Functional theories. - 87 p.

Source: Dissertation Abstracts International, Volume: 65-12, Section: B, page: 6445.

Thesis (Ph.D.)--City University of New York, 2005.

This thesis is concerned with the first Hohenberg-Kohn (HK) theorem, its extension to the time-dependent case by Runge-Gross (RG), and the application and further extension of Quantal Density Functional theory (Q-DFT). According to the HK theorem, the ground state density rho(r) of a system uniquely determines its Hamiltonian H to within an additive constant C, and thus the physical system and its properties. In the RG extension, the density rho(rt) uniquely determines the time-dependent Hamiltonian H(t) to within a purely time-dependent function C(t), and hence the system and its properties. We prove, by construction, the corollary that degenerate {time-independent/time-dependent} Hamiltonians {H/H (t)} that represent different physical systems; but which differ by a {constant C/function C( t)}, and yet possess the same density {rho(r)/rho( rt)}, cannot be distinguished on the basis of the HK/RG theorem.

ISBN: 0496921991Subjects--Topical Terms:

1018743
Physics, Condensed Matter.

Studies in Hohenberg-Kohn and Quantal Density Functional theories.
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035 $a (UnM)AAI3159242
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040 $a UnM $c UnM
100 1 $a Pan, Xiao-Yin. $3 1903395
245 1 0 $a Studies in Hohenberg-Kohn and Quantal Density Functional theories.
300 $a 87 p.
500 $a Source: Dissertation Abstracts International, Volume: 65-12, Section: B, page: 6445.
500 $a Adviser: Viraht Sahni.
502 $a Thesis (Ph.D.)--City University of New York, 2005.
520 $a This thesis is concerned with the first Hohenberg-Kohn (HK) theorem, its extension to the time-dependent case by Runge-Gross (RG), and the application and further extension of Quantal Density Functional theory (Q-DFT). According to the HK theorem, the ground state density rho(r) of a system uniquely determines its Hamiltonian H to within an additive constant C, and thus the physical system and its properties. In the RG extension, the density rho(rt) uniquely determines the time-dependent Hamiltonian H(t) to within a purely time-dependent function C(t), and hence the system and its properties. We prove, by construction, the corollary that degenerate {time-independent/time-dependent} Hamiltonians {H/H (t)} that represent different physical systems; but which differ by a {constant C/function C( t)}, and yet possess the same density {rho(r)/rho( rt)}, cannot be distinguished on the basis of the HK/RG theorem.
520 $a Q-DFT is a local effective potential energy theory that maps the interacting system described by Schrodinger's equation to one of noninteracting Fermions such that the equivalent density {rho(r)/rho(r t)}, energy {E/E(t)}, and ionization potential are obtained. This mapping is in terms of 'classical' fields and quantal sources representative of electron correlations the model system must account for, viz. those due to the Pauli exclusion principle, Coulomb repulsion, Correlation-Kinetic and Correlation-Current-Density effects. The mapping contrasts with that of traditional Kohn-Sham (KS) DFT, which in the time-independent case, is in terms of an energy density functional for the ground state, and an energy bidensity functional for excited states, and of their functional derivatives. Here we apply time-independent Q-DFT to study the properties of the hydrogen molecule in its ground state. We further extend time-independent nondegenerate Q-DFT to degenerate states for both ground and excited states, and for both pure state and ensemble densities. This further provides a rigorous physical interpretation of the energy density and bidensity functionals, and their derivatives, of degenerate state KS-DFT.
590 $a School code: 0046.
650 4 $a Physics, Condensed Matter. $3 1018743
650 4 $a Physics, Molecular. $3 1018648
650 4 $a Physics, Atomic. $3 1029235
690 $a 0611
690 $a 0609
690 $a 0748
710 2 0 $a City University of New York. $3 1018111
773 0 $t Dissertation Abstracts International $g 65-12B.
790 1 0 $a Sahni, Viraht, $e advisor
790 $a 0046
791 $a Ph.D.
792 $a 2005
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3159242