Quantum embedding for excited states in molecular and periodic systems
ORAL
Abstract
Projection-based quantum embedding methodologies provide a framework for performing DFT-in-DFT and wavefunction-in-density functional theory (WF-in-DFT) calculations. The previous application of using absolute localization on the ground states of molecular systems1 and periodic systems2 showed high accuracy and improved computational efficiency.
In this work, we extend the absolute localization method to study localized excited states in molecular and periodic systems. We show the accurate embedding results on small organic molecules and green fluorescent protein (GFP). We are further extending our methods to periodic systems. Ray et al.3 found that different density functionals have to be used for CsMI3 (M = Ge, Sn, Pb, Mg, Ca, Sr and Ba) to reproduce the experimental band gaps. Not a single exchange-correlation functional can give consistently good results among these inorganic perovskites.3 We discuss our progress of making periodic WF-in-DFT embedding methods applicable to such systems.
1. Chulhai, D. V.; Goodpaster, J. D. J. Chem. Theory Comput. 2017, 13, 1503-1508.
2. Chulhai, D. V.; Goodpaster, J. D. J. Chem. Theory Comput. 2018, 14, 1928–1942.
3. Ray, D.; Clark, C.; Pham, H. Q.; Borycz, J.; Holmes, R. J.; Aydil, E. S.; Gagliardi, L. J. Chem. Phys. C. 2018, 122, 7838–7848.
In this work, we extend the absolute localization method to study localized excited states in molecular and periodic systems. We show the accurate embedding results on small organic molecules and green fluorescent protein (GFP). We are further extending our methods to periodic systems. Ray et al.3 found that different density functionals have to be used for CsMI3 (M = Ge, Sn, Pb, Mg, Ca, Sr and Ba) to reproduce the experimental band gaps. Not a single exchange-correlation functional can give consistently good results among these inorganic perovskites.3 We discuss our progress of making periodic WF-in-DFT embedding methods applicable to such systems.
1. Chulhai, D. V.; Goodpaster, J. D. J. Chem. Theory Comput. 2017, 13, 1503-1508.
2. Chulhai, D. V.; Goodpaster, J. D. J. Chem. Theory Comput. 2018, 14, 1928–1942.
3. Ray, D.; Clark, C.; Pham, H. Q.; Borycz, J.; Holmes, R. J.; Aydil, E. S.; Gagliardi, L. J. Chem. Phys. C. 2018, 122, 7838–7848.
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Presenters
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Xuelan Wen
Department of Chemistry, University of Minnesota, Twin Cities
Authors
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Xuelan Wen
Department of Chemistry, University of Minnesota, Twin Cities
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Dhabih Chulhai
Department of Chemistry, University of Minnesota, Twin Cities
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Jason Goodpaster
Department of Chemistry, University of Minnesota, Twin Cities, University of Minnesota