@article { ISI:000269926200012,
	title = {Intermediate hamiltonian hilbert space coupled cluster method: theory and pilot application},
	journal = {International Journal of Quantum Chemistry},
	volume = {109},
	number = {13},
	year = {2009},
	month = {NOV},
	pages = {2909-2915},
	publisher = {JOHN WILEY \& SONS INC},
	address = {111 RIVER ST, HOBOKEN, NJ 07030 USA},
	abstract = {<p>The intermediate Hamiltonian state universal (Hilbert-space) coupled-cluster method is presented, using a formalism similar to that developed for the valence universal (Fock-space) approach. The method is expected to be applicable to many states not accessible by traditional multiroot multireference all-order size-extensive approaches. A pilot application to excited states of atomic beryllium shows good convergence and agreement with experiment and full CI values. (C) 2009 Wiley Periodicals, Inc. Int J Quantum Chem 109: 2909-2915, 2009</p>},
	keywords = {coupled cluster, Hilbert space, intermediate Hamiltonian},
	issn = {0020-7608},
	doi = {10.1002/qua.22155},
	author = {Eliav, Ephraim and Borschevsky, Anastasia and Shamasundar, K. R. and Pal, Sourav and Kaldor, Uzi}
}
@article {46959,
	title = {Shape resonance of sulphur dioxide anion excited states using the CAP-CIP-FSMRCCSD method},
	journal = {Molecular Physics},
	volume = {118},
	year = {2020},
	month = {AUG },
	type = {Article},
	abstract = {<p>We have studied the shape resonance of excited states of sulphur dioxide (SO2) anion by using the correlated independent particle Fock space multi-reference coupled cluster (CAP-CIP-FSMRCCSD) method augmented by complex absorption potential. These resonant states have been trapped experimentally in recent years by electron collision. In particular, we have investigated e(-)-SO2 scattering and computed the negative-ion resonance states of the anion responsible for the two resonances around 4.45 and 6.56 eV and compared the results with the existing experimental observations. From the computational results using the CAP-CIP-FSMRCCSD method, it has been observed that both the resonances near 4.45 and 6.56 eV result from A(1) symmetries. [GRAPHICS] .</p>
},
	keywords = {CAP augmented correlated independent particle (CAP-CIP-FSMRCCSD), complex absorption potential (CAP), coupled cluster, Fock space multireference coupled cluster (FSMRCCSD), shape resonance},
	issn = {0026-8976},
	doi = {10.1080/00268976.2020.1726521, Early Access Date = FEB 2020},
	author = {Basumallick, Suhita and Bhattacharya, Sumantra and Jana, Irina and Vaval, Nayana and Pal, Sourav}
}
