<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Manohar, Prashant Uday</style></author><author><style face="normal" font="default" size="100%">Vaval, Nayana</style></author><author><style face="normal" font="default" size="100%">Pal, Sourav</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Constrained variational response to Fock-space multi-reference coupled-cluster theory: Some pilot applications</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Molecular Structure-Theochem</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">constrained variation</style></keyword><keyword><style  face="normal" font="default" size="100%">coupled-cluster</style></keyword><keyword><style  face="normal" font="default" size="100%">Dipole moment</style></keyword><keyword><style  face="normal" font="default" size="100%">Multi-reference</style></keyword><keyword><style  face="normal" font="default" size="100%">response</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2006</style></year><pub-dates><date><style  face="normal" font="default" size="100%">AUG</style></date></pub-dates></dates><number><style face="normal" font="default" size="100%">1-3</style></number><publisher><style face="normal" font="default" size="100%">ELSEVIER SCIENCE BV</style></publisher><pub-location><style face="normal" font="default" size="100%">PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS</style></pub-location><volume><style face="normal" font="default" size="100%">768</style></volume><pages><style face="normal" font="default" size="100%">91-96</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Fock space (FS) multi-reference (MR) coupled-cluster (CC) has been established to be state-of-the-art method for energies of open-shell radicals, ionized, electron attached states and excited states. Due to the multi-root nature of the method, the linear response of MRCC, however, is non-trivial. Constrained variation approach (CVA) makes it plausible to calculate response of the MRCC method efficiently. However, the approach is used for only one root of the problem at a time. In the present article, we make first implementation of the approach and present test results of dipole moments of small radicals. (c) 2006 Elsevier B.V. All rights reserved.&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">1-3</style></issue><work-type><style face="normal" font="default" size="100%">Article</style></work-type><custom3><style face="normal" font="default" size="100%">&lt;p&gt;Foreign&lt;/p&gt;</style></custom3><custom4><style face="normal" font="default" size="100%">1.78</style></custom4></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>47</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Manohar, Prashant Uday</style></author><author><style face="normal" font="default" size="100%">Pal, Sourav</style></author></authors><secondary-authors><author><style face="normal" font="default" size="100%">Maroulis, G</style></author><author><style face="normal" font="default" size="100%">Simos, TE</style></author></secondary-authors></contributors><titles><title><style face="normal" font="default" size="100%">Constrained variational response to fock-space multi-reference coupled-cluster theory: formulation for excited-state electronic structure calculations and some pilot applications</style></title><secondary-title><style face="normal" font="default" size="100%">Computational Methods in Science and Engineering Vol 1: Theory and Computation: Old Problems and New Challenges</style></secondary-title><tertiary-title><style face="normal" font="default" size="100%">AIP CONFERENCE PROCEEDINGS</style></tertiary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">CVA</style></keyword><keyword><style  face="normal" font="default" size="100%">Dipole moment</style></keyword><keyword><style  face="normal" font="default" size="100%">excited states</style></keyword><keyword><style  face="normal" font="default" size="100%">FSMRCC</style></keyword><keyword><style  face="normal" font="default" size="100%">polarizability</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2007</style></year><pub-dates><date><style  face="normal" font="default" size="100%">SEP</style></date></pub-dates></dates><publisher><style face="normal" font="default" size="100%">European Soc Computat Methods Sci &amp; Engn; Minist Natl Educ &amp; Religious Affairs; E4 Comp Engn</style></publisher><pub-location><style face="normal" font="default" size="100%">2 Huntington Quadrangle, Ste 1no1, Melville, NY 11747-4501 USA</style></pub-location><volume><style face="normal" font="default" size="100%">963</style></volume><pages><style face="normal" font="default" size="100%">337-344</style></pages><isbn><style face="normal" font="default" size="100%">978-0-7354-0477-9</style></isbn><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Fock-space (FS) multi-reference (MR) coupled-cluster (CC) method has emerged as compact tool to account for electronic structure of open-shell systems and molecules in low-lying excited states. Development of linear response (LR) has been one of the challenging problems in FSMRCC due to multiple-root nature of effective Hamiltonian. The recently developed constrained variational approach (CVA) has opened up a promising tool for efficient evaluation of analytic response properties. In this article, we present formulation of the method for excited state calculations. We discuss the decoupling of equations as a result of spin-adaptation and present some preliminary results for analytical dipole moments and polarizabilities of some molecules in low-lying triplet excited states.&lt;/p&gt;</style></abstract><notes><style face="normal" font="default" size="100%">International Conference on Computational Methods in Science and Engineering, Corfu, GREECE, SEP 25-30, 2007</style></notes></record></records></xml>