@article { ISI:000336020400012,
	title = {Partitioned EOMEA-MBPT(2): an efficient N-5 scaling method for calculation of electron affinities},
	journal = {Journal of Chemical Theory and Computation},
	volume = {10},
	number = {5},
	year = {2014},
	month = {APR},
	pages = {1923-1933},
	publisher = {AMER CHEMICAL SOC},
	type = {Article},
	address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA},
	abstract = {<p>We present an N-5 scaling modification to the standard EOMEA-CCSD method, based on the matrix partitioning technique and perturbative approximations. The method has lower computational scaling and smaller storage requirements than the standard EOMEA-CCSD method and, therefore, can be used to calculate electron affinities of large molecules and clusters. The performance and capabilities of the new method have been benchmarked with the standard EOMEA-CCSD method, for a test set of 20 small molecules, and the average absolute deviation is only 0.03 eV. The method is further used to investigate electron affinities of DNA and RNA nucleobases, and the results are in excellent agreement with the experimental values.</p>},
	issn = {1549-9618},
	doi = {10.1021/ct4009409},
	author = {Dutta, Achintya Kumar and Gupta, Jitendra and Pathak, Himadri and Vaval, Nayana and Pal, Sourav}
}
@article { ISI:000357933400054,
	title = {Perturbative order analysis of the similarity transformed hamiltonian in fock-space coupled cluster theory: difference energy and electric response properties},
	journal = {Molecular Physics},
	volume = {113},
	number = {13-14, SI},
	year = {2015},
	month = {JUL},
	pages = {2046-2060},
	publisher = {TAYLOR \& FRANCIS LTD},
	address = {4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND},
	abstract = {<p>A perturbative analysis of the ground-state similarity transformed Hamiltonian and its effect on the various Fock-space coupled cluster (FSCC) sectors is presented through calculation of ionisation potential, electron affinity, excitation energies and response properties. Various truncation schemes of the effective Hamiltonian are presented with explicit form of the defining equations. Based on such a truncation, the approximate methods are labelled as FSCC(n), where n represents the correlation energy of the ionised, electron attached or excited states corrected at least up to nth order within coupled cluster singles and doubles scheme (CCSD). A lower scaling CC2 type of approach (abbreviated as FS-CC2) is compared against the group of FSCC(n) methods for energies. Electric response properties have been compared and contrasted for the two lower scaling methods: FSCC(2) and FS-CC2. The various truncated methods are tested for a number of small molecules. The results obtained from a range of truncated methods are compared against full FSCCSD calculations.</p>},
	keywords = {electric response properties, Fock space, perturbative order, similarity transformed Hamiltonian},
	issn = {0026-8976},
	doi = {10.1080/00268976.2015.1059509},
	author = {Bhattacharya, Debarati and Dutta, Achintya Kumar and Gupta, Jitendra and Pal, Sourav}
}
