標(biāo)題: Titlebook: Density Matrices and Density Functionals; Proceedings of the A Robert Erdahl,Vadene H. Smith Conference proceedings 1987 D. Reidel Publishi [打印本頁] 作者: 減輕 時(shí)間: 2025-3-21 19:26
書目名稱Density Matrices and Density Functionals影響因子(影響力)
書目名稱Density Matrices and Density Functionals影響因子(影響力)學(xué)科排名
書目名稱Density Matrices and Density Functionals網(wǎng)絡(luò)公開度
書目名稱Density Matrices and Density Functionals網(wǎng)絡(luò)公開度學(xué)科排名
書目名稱Density Matrices and Density Functionals被引頻次
書目名稱Density Matrices and Density Functionals被引頻次學(xué)科排名
書目名稱Density Matrices and Density Functionals年度引用
書目名稱Density Matrices and Density Functionals年度引用學(xué)科排名
書目名稱Density Matrices and Density Functionals讀者反饋
書目名稱Density Matrices and Density Functionals讀者反饋學(xué)科排名
作者: Champion 時(shí)間: 2025-3-21 21:19
Representability Conditions,e of those memorable mid-night sessions at Sanibel when we were discussing N-representability, Per-Olov sprang forward, took the chalk from my hand and demanded — ‘Have you considered the more general problem of ensemble representability?’”A non-pure state being a convex combination of pure, the col作者: deadlock 時(shí)間: 2025-3-22 00:25
On the Diagonal N-Representability Problem,sity matrix (RDM-2). This difficult problem, first explicitly formulated by A.J. Coleman [1], has not yet been resolved even in its weakened diagonal form. Very general results have been obtained by means of the theory of convex sets, [2]. It seems that the most interesting achievement attained alon作者: Immunoglobulin 時(shí)間: 2025-3-22 05:38
Fermion N-Representability Conditions Generated by a Decomposition of the 1-Particle Identity Opera fermion reduced 2-density operators is a convex set and the ground state energy of a system can be determined variationally by minimizing the functional . over the set P. (h. is the reduced hamiltonian). However, a complete characterization of P. has not yet been given. It has been shown [22] that 作者: 玉米 時(shí)間: 2025-3-22 11:10
Time Dependent Antisymmetrized Geminal Power Theory using a Coherent State Formulation,es, with the number of particles n acting as the “charge”. The family of Hartree-Fock-Bogoliubov (HFB) states for the same set of spin orbitals form a set of coherent states that are generating functions for the AGP coherent states for all n. The approximate time evolution of the system generated by作者: 憤世嫉俗者 時(shí)間: 2025-3-22 16:27
Griffiths Inequalities for Fermion Systems, peculiar characteristics of the system at hand. Such information may be used very explicitly, as in the development of Hamiltonian-dependent inequalities, or in a weaker fashion, paying attention to such matters as the sign of the interaction. This latter category is represented in classical lattic作者: 憤世嫉俗者 時(shí)間: 2025-3-22 20:36
Entropy of Reduced Density Matrices,sity matrix representing the state of an N-particle system to the entropy of the corresponding reduced density matrices. One important inequality of this type is.where ρ. is the 1-particle density matrix of the system. The density matrices are normalized so that Trρ. = 1 and Trρ. = N; the upper sign作者: PALMY 時(shí)間: 2025-3-22 23:15 作者: 描繪 時(shí)間: 2025-3-23 05:27
Reduced Density Operators, Their Related von Neumann Density Operators, Close Cousins of These, andtom or molecule) can be realized as an idealization of the statistical von Neumann density operator of the ion formed from that pure stationary state in an appropriate sudden ionization experiment. The N-electron Hermitian operator whose matrix representation is the Garrod and Percus G-Matrix (the m作者: 強(qiáng)行引入 時(shí)間: 2025-3-23 07:05
Theory and Practice of the Spin-Adapted Reduced Hamiltonians (SRH),matrices as describing in an average way independent pairs of electrons. Using this idea an approximate method is devised for the direct determination of the second order reduced density matrices. This method is described in detail here. Some of the results recently obtained [22–23] for the Berylliu作者: obsolete 時(shí)間: 2025-3-23 12:07
Variational Principle with Built-In Pure State N-Representability Conditions. The N-Electron Case,ensity operator corresponding to a pure-state. This expression is obtained in the context of a variational procedure where a minimum is sought for the internal energy functional., subject to the following conditions: a) that at all stages of variation. where P. is the set of pure-state nth-order den作者: 山羊 時(shí)間: 2025-3-23 17:48
Wigner Distributions as Representations of the Density Matrix,asis on associating the quasi probability distributions with density matrices. The relation between reduced phase space distributions and reduced density matrices is derived. The time independent Schrodinger equation is used to write the eigenvalue equation for the quasi probability distributions an作者: 廚師 時(shí)間: 2025-3-23 19:44 作者: Mucosa 時(shí)間: 2025-3-23 22:48 作者: 豐滿有漂亮 時(shí)間: 2025-3-24 03:30
The Interface Between Reduced Density Matrices and Density Functional Theory, functional theory. One of the most fundamental ideas is that a density should be thought of as arising from an . density matrix rather than necessarily from a wavefunction. One can then take advantage of the convexity of the set of n- representable density matrices, and a number of the formal probl作者: 少量 時(shí)間: 2025-3-24 10:26 作者: 不可知論 時(shí)間: 2025-3-24 13:28
https://doi.org/10.1007/978-94-009-3855-7Atom; Boson; Schr?dinger equation; crystallography; decomposition; density; development; electron; entropy; g作者: jabber 時(shí)間: 2025-3-24 18:07 作者: 重畫只能放棄 時(shí)間: 2025-3-24 22:57 作者: sperse 時(shí)間: 2025-3-25 00:47
Aleksandar ?oli?,Oge Marques,Borko Furhte of those memorable mid-night sessions at Sanibel when we were discussing N-representability, Per-Olov sprang forward, took the chalk from my hand and demanded — ‘Have you considered the more general problem of ensemble representability?’”A non-pure state being a convex combination of pure, the col作者: 蜿蜒而流 時(shí)間: 2025-3-25 06:25
General Discussion and Conclusion,sity matrix (RDM-2). This difficult problem, first explicitly formulated by A.J. Coleman [1], has not yet been resolved even in its weakened diagonal form. Very general results have been obtained by means of the theory of convex sets, [2]. It seems that the most interesting achievement attained alon作者: tenosynovitis 時(shí)間: 2025-3-25 11:15
Theoretical and Practical Contributions, fermion reduced 2-density operators is a convex set and the ground state energy of a system can be determined variationally by minimizing the functional . over the set P. (h. is the reduced hamiltonian). However, a complete characterization of P. has not yet been given. It has been shown [22] that 作者: adduction 時(shí)間: 2025-3-25 14:34
Marcella Nicolini,Laura Resminies, with the number of particles n acting as the “charge”. The family of Hartree-Fock-Bogoliubov (HFB) states for the same set of spin orbitals form a set of coherent states that are generating functions for the AGP coherent states for all n. The approximate time evolution of the system generated by作者: 很像弓] 時(shí)間: 2025-3-25 17:21
Marcella Nicolini,Laura Resmini peculiar characteristics of the system at hand. Such information may be used very explicitly, as in the development of Hamiltonian-dependent inequalities, or in a weaker fashion, paying attention to such matters as the sign of the interaction. This latter category is represented in classical lattic作者: 不近人情 時(shí)間: 2025-3-25 22:44
Jenny Grek,Charlie Karlsson,Johan Klaessonsity matrix representing the state of an N-particle system to the entropy of the corresponding reduced density matrices. One important inequality of this type is.where ρ. is the 1-particle density matrix of the system. The density matrices are normalized so that Trρ. = 1 and Trρ. = N; the upper sign作者: 辯論 時(shí)間: 2025-3-26 01:42
Empirical findings from the main studies,variation is constrained by representability conditions but our knowledge of these is incomplete. As a consequence, lower bounds to ground state energies are obtained. This method has been successfully applied to fermion systems and we review some earlier work on light nuclei and the berylium atom. 作者: Repatriate 時(shí)間: 2025-3-26 08:06
Harry Waugh,Simon McIntosh-Smithtom or molecule) can be realized as an idealization of the statistical von Neumann density operator of the ion formed from that pure stationary state in an appropriate sudden ionization experiment. The N-electron Hermitian operator whose matrix representation is the Garrod and Percus G-Matrix (the m作者: CHARM 時(shí)間: 2025-3-26 10:42 作者: Inflammation 時(shí)間: 2025-3-26 14:19
https://doi.org/10.1007/978-3-030-63393-6ensity operator corresponding to a pure-state. This expression is obtained in the context of a variational procedure where a minimum is sought for the internal energy functional., subject to the following conditions: a) that at all stages of variation. where P. is the set of pure-state nth-order den作者: superfluous 時(shí)間: 2025-3-26 17:51 作者: 裝入膠囊 時(shí)間: 2025-3-27 00:57 作者: grandiose 時(shí)間: 2025-3-27 05:10 作者: Neutropenia 時(shí)間: 2025-3-27 07:02 作者: Predigest 時(shí)間: 2025-3-27 13:03
Andreas Schmidt,Michael GüntnerIt is certainly a great honor and privilege for me to be asked to give the after-dinner speech at this conference dedicated to Professor A. John Coleman, and it is also a personal pleasure since I am indebted to him in many different ways.作者: 阻擋 時(shí)間: 2025-3-27 16:53
Andreas Schmidt,Michael GüntnerThe history of the chief concepts centred around reduced density matrices is surveyed. Six research topics are proposed.作者: 殘暴 時(shí)間: 2025-3-27 20:39 作者: 外表讀作 時(shí)間: 2025-3-28 01:09
Karima Kourtit,Peter Nijkamp,Roger R. StoughThe quasi-spin scheme is used to obtain an explicit orthonormal basis for n-fermion states in the form of Generalized Antisymmetrized Power functions, exhibiting symplectic symmetry and adapted to the pairing hamiltonian.作者: 翻動(dòng) 時(shí)間: 2025-3-28 02:51 作者: refraction 時(shí)間: 2025-3-28 08:47 作者: BARK 時(shí)間: 2025-3-28 12:41 作者: 外觀 時(shí)間: 2025-3-28 16:27 作者: Gratulate 時(shí)間: 2025-3-28 20:57
Thorben Louw,Simon McIntosh-Smithd first-order reduced density operator, and charge densities, momentum densities, form factors and internally folded densities. These somewhat abstract considerations are made concrete by explicit calculations for the “harmonium” atom, i.e. the harmonic model of two-electron atoms.作者: BUMP 時(shí)間: 2025-3-29 01:49 作者: Pageant 時(shí)間: 2025-3-29 05:02 作者: 火光在搖曳 時(shí)間: 2025-3-29 07:13 作者: 嚴(yán)峻考驗(yàn) 時(shí)間: 2025-3-29 13:26
Griffiths Inequalities for Fermion Systems,inequalities, whose classical version we review, emphasizing the role of replica systems and tailored representations for painless realization of correlations. It is found that the BCS Hamiltonian, as well as its replica pair, can be treated in analogous fashion, producing a large set of correlation作者: Exposition 時(shí)間: 2025-3-29 19:29 作者: 不成比例 時(shí)間: 2025-3-29 21:20 作者: 孵卵器 時(shí)間: 2025-3-30 01:41 作者: 軟弱 時(shí)間: 2025-3-30 06:34
Marcella Nicolini,Laura Resminiinequalities, whose classical version we review, emphasizing the role of replica systems and tailored representations for painless realization of correlations. It is found that the BCS Hamiltonian, as well as its replica pair, can be treated in analogous fashion, producing a large set of correlation作者: 向外才掩飾 時(shí)間: 2025-3-30 10:46
Ian Miles,Howard Rush,John Bessant straightforward characterization of n-representable 1-matrices corresponding to a given density. It is thus also possible, for example, to determine the minimum kinetic energy that can be associated with a given density. The relationship between densities and density matrices depends on linear depe作者: tinnitus 時(shí)間: 2025-3-30 15:09 作者: glucagon 時(shí)間: 2025-3-30 18:04
ber of the faculty at the University of Toronto and for 20 years, starting in 1960, he served as Dupuis Professor of Mathematics and Head of the Department at Queen‘s University. Since 1983 he has been Professor Emeritus at Queen‘s.978-94-010-8214-3978-94-009-3855-7作者: GORGE 時(shí)間: 2025-3-30 21:13
Conference proceedings 1987y scientific accomplishments. John was born in Toronto on May 20, 1918 and 21 years later graduated from the University of Toronto in mathematics. Along the way he teamed up with Irving Kaplansky and Nathan Mendelson to win the first William Lowell Putnam Mathematical Competition in 1938. He earned 作者: SMART 時(shí)間: 2025-3-31 01:27
Marcella Nicolini,Laura Resminie Approximation based on such states is derived by considering small amplitude oscillations in this phase space. This work generalizes the group theoretical approaches to Hartree-Fock and time dependent Hartree-Fock to correlated and non-number conserving states.作者: hypertension 時(shí)間: 2025-3-31 08:02
Harry Waugh,Simon McIntosh-Smithmparison of these statistical von Neumann density operators with those obtained from specified perturbations allows discrimination between responses of the system which depend strongly upon the excitation mechanism and those which are characteristic of the system and only weakly dependent on the excitation mechanism.作者: 祝賀 時(shí)間: 2025-3-31 10:05 作者: 一起 時(shí)間: 2025-3-31 16:57 作者: 極大痛苦 時(shí)間: 2025-3-31 17:56 作者: HALO 時(shí)間: 2025-4-1 00:42 作者: 帶子 時(shí)間: 2025-4-1 05:26
Jenny Grek,Charlie Karlsson,Johan Klaessoncase of two-particle density matrices. We also conjecture that S(ρ.) ≥ 0 in the case of fermions when the two-particle density matrix, ρ., is normalized so that.. Evidence for the validity of both conjectures will be presented.作者: 確認(rèn) 時(shí)間: 2025-4-1 06:19
Empirical findings from the main studies,h spinor fermion source. Our lower bounds are remarkably close to upper bounds obtained using wave functions and hence form strong evidence supporting our view that the present method forms a powerful computational tool in many-body theory.作者: 有危險(xiǎn) 時(shí)間: 2025-4-1 11:53
