51
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Konecny L, Kadek M, Komorovsky S, Ruud K, Repisky M. Resolution-of-identity accelerated relativistic two- and four-component electron dynamics approach to chiroptical spectroscopies. J Chem Phys 2018; 149:204104. [PMID: 30501232 DOI: 10.1063/1.5051032] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We present an implementation and application of electron dynamics based on real-time time-dependent density functional theory (RT-TDDFT) and relativistic 2-component X2C and 4-component Dirac-Coulomb (4c) Hamiltonians to the calculation of electron circular dichroism and optical rotatory dispersion spectra. In addition, the resolution-of-identity approximation for the Coulomb term (RI-J) is introduced into RT-TDDFT and formulated entirely in terms of complex quaternion algebra. The proposed methodology was assessed on the dimethylchalcogenirane series, C4H8X (X = O, S, Se, Te, Po, Lv), and the spectra obtained by non-relativistic and relativistic methods start to disagree for Se and Te, while dramatic differences are observed for Po and Lv. The X2C approach, even in its simplest one-particle form, reproduces the reference 4c results surprisingly well across the entire series while offering an 8-fold speed-up of the simulations. An overall acceleration of RT-TDDFT by means of X2C and RI-J increases with system size and approaches a factor of almost 25 when compared to the full 4c treatment, without compromising the accuracy of the final spectra. These results suggest that one-particle X2C electron dynamics with RI-J acceleration is an attractive method for the calculation of chiroptical spectra in the valence region.
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Affiliation(s)
- Lukas Konecny
- Hylleraas Centre for Quantum Molecular Sciences, Department of Chemistry, University of Tromsø-The Arctic University of Norway, Tromsø, Norway
| | - Marius Kadek
- Hylleraas Centre for Quantum Molecular Sciences, Department of Chemistry, University of Tromsø-The Arctic University of Norway, Tromsø, Norway
| | - Stanislav Komorovsky
- Institute of Inorganic Chemistry, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Kenneth Ruud
- Hylleraas Centre for Quantum Molecular Sciences, Department of Chemistry, University of Tromsø-The Arctic University of Norway, Tromsø, Norway
| | - Michal Repisky
- Hylleraas Centre for Quantum Molecular Sciences, Department of Chemistry, University of Tromsø-The Arctic University of Norway, Tromsø, Norway
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52
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Sinha-Roy R, García-González P, López Lozano X, Whetten RL, Weissker HC. Identifying Electronic Modes by Fourier Transform from δ-Kick Time-Evolution TDDFT Calculations. J Chem Theory Comput 2018; 14:6417-6426. [PMID: 30404453 DOI: 10.1021/acs.jctc.8b00750] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Time-dependent density-functional theory (TDDFT) is widely used for calculating electron excitations in clusters and large molecules. For optical excitations, TDDFT is customarily applied in two distinct approaches: transition-based linear-response TDDFT (LR-TDDFT) and the real-time formalism (RT-TDDFT). The former directly provides the energies and transition densities of the excitations, but it requires the calculation of a large number of empty electron states, which makes it cumbersome for large systems. By contrast, RT-TDDFT circumvents the evaluation of empty orbitals, which is especially advantageous when dealing with large systems. A drawback of the procedure is that information about the nature of individual spectral features is not automatically obtained, although it is of course contained in the time-dependent induced density. Fourier transform of the induced density has been used in some simple cases, but the method is, surprisingly, not widely used to complement the RT-TDDFT calculations; although the reliability of RT-TDDFT spectra is now widely accepted, a critical assessment for the corresponding transition densities and a demonstration of the technical feasibility of the Fourier-transform evaluation for general cases is still lacking. In the present work, we show that the transition densities of the optically allowed excitations can be efficiently extracted from a single δ-kick time-evolution calculation even in complex systems like noble metals. We assess the results by comparison with the corresponding LR-TDDFT ones and also with the induced densities arising from RT-TDDFT simulations of the excitation process.
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Affiliation(s)
- Rajarshi Sinha-Roy
- Aix-Marseille University , CNRS, CINaM , 13288 Marseille , France.,Departamento de Física Teórica de la Materia Condensada and Condensed Matter Physics Center (IFIMAC) , Universidad Autónoma de Madrid , E-28049 Madrid , Spain.,European Theoretical Spectroscopy Facility (ETSF)
| | - Pablo García-González
- Departamento de Física Teórica de la Materia Condensada and Condensed Matter Physics Center (IFIMAC) , Universidad Autónoma de Madrid , E-28049 Madrid , Spain.,European Theoretical Spectroscopy Facility (ETSF)
| | - Xóchitl López Lozano
- Department of Physics & Astronomy , The University of Texas at San Antonio , One UTSA Circle , San Antonio , Texas 78249-0697 , United States
| | - Robert L Whetten
- Department of Physics & Astronomy , The University of Texas at San Antonio , One UTSA Circle , San Antonio , Texas 78249-0697 , United States
| | - Hans-Christian Weissker
- Aix-Marseille University , CNRS, CINaM , 13288 Marseille , France.,European Theoretical Spectroscopy Facility (ETSF)
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53
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Comparison and convergence of optical absorption spectra of noble metal nanoparticles computed using linear-response and real-time time-dependent density functional theories. COMPUT THEOR CHEM 2018. [DOI: 10.1016/j.comptc.2018.11.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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54
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Mattiat J, Luber S. Efficient calculation of (resonance) Raman spectra and excitation profiles with real-time propagation. J Chem Phys 2018; 149:174108. [DOI: 10.1063/1.5051250] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Johann Mattiat
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, Zurich, Switzerland
| | - Sandra Luber
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, Zurich, Switzerland
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55
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Lian C, Hu SQ, Guan MX, Meng S. Momentum-resolved TDDFT algorithm in atomic basis for real time tracking of electronic excitation. J Chem Phys 2018; 149:154104. [PMID: 30342439 DOI: 10.1063/1.5036543] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Ultrafast electronic dynamics in solids lies at the core of modern condensed matter and materials physics. To build up a practical ab initio method for studying solids under photoexcitation, we develop a momentum-resolved real-time time dependent density functional theory (rt-TDDFT) algorithm using numerical atomic basis, together with the implementation of both the length and vector gauge of the electromagnetic field. When applied to simulate elementary excitations in two-dimensional materials such as graphene, different excitation modes, only distinguishable in momentum space, are observed. The momentum-resolved rt-TDDFT is important and computationally efficient for the study of ultrafast dynamics in extended systems.
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Affiliation(s)
- Chao Lian
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
| | - Shi-Qi Hu
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
| | - Meng-Xue Guan
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
| | - Sheng Meng
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
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56
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Neville SP, Schuurman MS. A general approach for the calculation and characterization of x-ray absorption spectra. J Chem Phys 2018; 149:154111. [DOI: 10.1063/1.5048520] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Affiliation(s)
- Simon P. Neville
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
| | - Michael S. Schuurman
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
- National Research Council of Canada, 100 Sussex Drive, Ottawa, Ontario K1A 0R6, Canada
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57
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Abstract
This report presents selected highlights from 2017 final birth data on key demographic, health care utilization, and infant health indicators. General fertility rates (the number of births per 1,000 females aged 15-44 years) and teen birth rates are presented by race and Hispanic origin. The use of Medicaid as the source of payment for the delivery and preterm birth rates are presented by the age of the mother. Data for 2017 are compared with 2016 for each indicator.
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58
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Hofmann F, Schelter I, Kümmel S. Linear response time-dependent density functional theory without unoccupied states: The Kohn-Sham-Sternheimer scheme revisited. J Chem Phys 2018; 149:024105. [DOI: 10.1063/1.5030652] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Affiliation(s)
- Fabian Hofmann
- Theoretical Physics IV, University of Bayreuth, D-95440 Bayreuth, Germany
| | - Ingo Schelter
- Theoretical Physics IV, University of Bayreuth, D-95440 Bayreuth, Germany
| | - Stephan Kümmel
- Theoretical Physics IV, University of Bayreuth, D-95440 Bayreuth, Germany
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59
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Kasper JM, Lestrange PJ, Stetina TF, Li X. Modeling L2,3-Edge X-ray Absorption Spectroscopy with Real-Time Exact Two-Component Relativistic Time-Dependent Density Functional Theory. J Chem Theory Comput 2018; 14:1998-2006. [DOI: 10.1021/acs.jctc.7b01279] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Joseph M. Kasper
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Patrick J. Lestrange
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Torin F. Stetina
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Xiaosong Li
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
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60
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Morzan UN, Alonso de Armiño DJ, Foglia NO, Ramírez F, González Lebrero MC, Scherlis DA, Estrin DA. Spectroscopy in Complex Environments from QM–MM Simulations. Chem Rev 2018; 118:4071-4113. [DOI: 10.1021/acs.chemrev.8b00026] [Citation(s) in RCA: 97] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Uriel N. Morzan
- Departamento de Química Inorgánica, Analítica y Química Física/INQUIMAE-CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab. II, C1428EHA Buenos Aires, Argentina
| | - Diego J. Alonso de Armiño
- Departamento de Química Inorgánica, Analítica y Química Física/INQUIMAE-CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab. II, C1428EHA Buenos Aires, Argentina
| | - Nicolás O. Foglia
- Departamento de Química Inorgánica, Analítica y Química Física/INQUIMAE-CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab. II, C1428EHA Buenos Aires, Argentina
| | - Francisco Ramírez
- Departamento de Química Inorgánica, Analítica y Química Física/INQUIMAE-CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab. II, C1428EHA Buenos Aires, Argentina
| | - Mariano C. González Lebrero
- Departamento de Química Inorgánica, Analítica y Química Física/INQUIMAE-CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab. II, C1428EHA Buenos Aires, Argentina
| | - Damián A. Scherlis
- Departamento de Química Inorgánica, Analítica y Química Física/INQUIMAE-CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab. II, C1428EHA Buenos Aires, Argentina
| | - Darío A. Estrin
- Departamento de Química Inorgánica, Analítica y Química Física/INQUIMAE-CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab. II, C1428EHA Buenos Aires, Argentina
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61
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Schelter I, Kümmel S. Accurate Evaluation of Real-Time Density Functional Theory Providing Access to Challenging Electron Dynamics. J Chem Theory Comput 2018; 14:1910-1927. [DOI: 10.1021/acs.jctc.7b01013] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ingo Schelter
- Department of Physics, University of Bayreuth, 95440 Bayreuth, Germany
| | - Stephan Kümmel
- Department of Physics, University of Bayreuth, 95440 Bayreuth, Germany
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62
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Bowman DN, Asher JC, Fischer SA, Cramer CJ, Govind N. Excited-state absorption in tetrapyridyl porphyrins: comparing real-time and quadratic-response time-dependent density functional theory. Phys Chem Chem Phys 2018; 19:27452-27462. [PMID: 28975162 DOI: 10.1039/c7cp04567k] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three meso-substituted tetrapyridyl porphyrins (free base, Ni(ii), and Cu(ii)) were investigated for their optical limiting (OL) capabilities using real-time (RT-), linear-response (LR-), and quadratic-response (QR-) time-dependent density functional theory (TDDFT) methods. These species are experimentally known to display a prominent reverse saturable absorption feature between the Q and B bands of the ground-state absorption (GSA), which has been attributed to increased excited-state absorption (ESA) relative to GSA. A recently developed RT-TDDFT based method for calculating ESA from a LR-TDDFT density was utilized with eight exchange-correlation functionals (BLYP, PBE, B3LYP, CAM-B3LYP, PBE0, M06, BHLYP, and BHandH) and contrasted with calculations of ESA using QR-TDDFT with five exchange-correlation functionals (BLYP, B3LYP, CAM-B3LYP, BHLYP, and BHandH). This allowed for comparison between functionals with varying amounts of exact exchange as well as between the ability of RT-TDDFT and QR-TDDFT to reproduce OL behavior in porphyrin systems. The absorption peak positions and intensities for GSA and ESA are significantly impacted by the choice of DFT functional, with the most critical factor identified as the amount of exact exchange in the functional form. Calculating ESA with QR-TDDFT is found to be significantly more sensitive to the amount of exact exchange than GSA and ESA with RT-TDDFT, as well as GSA with LR-TDDFT. An analogous behavior is also demonstrated for the polycyclic aromatic hydrocarbon coronene. This is problematic when using the same approximate functional for calculation of both GSA and ESA, as the LR- and QR-TDDFT excitation energies will not have similar errors. Overall, the RT-TDDFT method with hybrid functionals reproduces the OL features for the porphyrin systems studied here and is a viable computational approach for efficient screening of molecular complexes for OL properties.
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Affiliation(s)
- David N Bowman
- Department of Chemistry, Supercomputing Institute and Chemical Theory Center, University of Minnesota, Minneapolis, Minnesota 55455, USA.
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63
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Zhu Y, Herbert JM. Self-consistent predictor/corrector algorithms for stable and efficient integration of the time-dependent Kohn-Sham equation. J Chem Phys 2018; 148:044117. [PMID: 29390834 DOI: 10.1063/1.5004675] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Ying Zhu
- Department of Chemistry and Biochemistry, and Chemical Physics Program, The Ohio State University, Columbus, Ohio 43210, USA
| | - John M. Herbert
- Department of Chemistry and Biochemistry, and Chemical Physics Program, The Ohio State University, Columbus, Ohio 43210, USA
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64
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Donati G, Wildman A, Caprasecca S, Lingerfelt DB, Lipparini F, Mennucci B, Li X. Coupling Real-Time Time-Dependent Density Functional Theory with Polarizable Force Field. J Phys Chem Lett 2017; 8:5283-5289. [PMID: 28994290 DOI: 10.1021/acs.jpclett.7b02320] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Real-time time-dependent density functional theory (RT-TDDFT) is a powerful tool for obtaining spectroscopic observables and understanding complex, time-dependent properties. Currently, performing RT-TDDFT calculations on large, fully quantum mechanical systems is not computationally feasible. Previously, polarizable mixed quantum mechanical and molecular mechanical (QM/MMPol) models have been successful in providing accurate, yet efficient, approximations to a fully quantum mechanical system. Here we develop a coupling scheme between induced dipole based QM/MMPol and RT-TDDFT. Our approach is validated by comparing calculated spectra with both real-time and linear-response TDDFT calculations. The model developed within provides an accurate method for performing RT-TDDFT calculations on extended systems while accounting for mutual polarization between the quantum mechanical and molecular mechanical regions.
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Affiliation(s)
- Greta Donati
- Department of Chemistry, University of Washington , Seattle, Washington 98195, United States
| | - Andrew Wildman
- Department of Chemistry, University of Washington , Seattle, Washington 98195, United States
| | - Stefano Caprasecca
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa , Via G. Moruzzi 13, 56124 Pisa, Italy
| | - David B Lingerfelt
- Department of Chemistry, University of Washington , Seattle, Washington 98195, United States
| | - Filippo Lipparini
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa , Via G. Moruzzi 13, 56124 Pisa, Italy
| | - Benedetta Mennucci
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa , Via G. Moruzzi 13, 56124 Pisa, Italy
| | - Xiaosong Li
- Department of Chemistry, University of Washington , Seattle, Washington 98195, United States
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65
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Van Beeumen R, Williams-Young DB, Kasper JM, Yang C, Ng EG, Li X. Model Order Reduction Algorithm for Estimating the Absorption Spectrum. J Chem Theory Comput 2017; 13:4950-4961. [PMID: 28862869 DOI: 10.1021/acs.jctc.7b00402] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The ab initio description of the spectral interior of the absorption spectrum poses both a theoretical and computational challenge for modern electronic structure theory. Due to the often spectrally dense character of this domain in the quantum propagator's eigenspectrum for medium-to-large sized systems, traditional approaches based on the partial diagonalization of the propagator often encounter oscillatory and stagnating convergence. Electronic structure methods which solve the molecular response problem through the solution of spectrally shifted linear systems, such as the complex polarization propagator, offer an alternative approach which is agnostic to the underlying spectral density or domain location. This generality comes at a seemingly high computational cost associated with solving a large linear system for each spectral shift in some discretization of the spectral domain of interest. In this work, we present a novel, adaptive solution to this high computational overhead based on model order reduction techniques via interpolation. Model order reduction reduces the computational complexity of mathematical models and is ubiquitous in the simulation of dynamical systems and control theory. The efficiency and effectiveness of the proposed algorithm in the ab initio prediction of X-ray absorption spectra is demonstrated using a test set of challenging water clusters which are spectrally dense in the neighborhood of the oxygen K-edge. On the basis of a single, user defined tolerance we automatically determine the order of the reduced models and approximate the absorption spectrum up to the given tolerance. We also illustrate that, for the systems studied, the automatically determined model order increases logarithmically with the problem dimension, compared to a linear increase of the number of eigenvalues within the energy window. Furthermore, we observed that the computational cost of the proposed algorithm only scales quadratically with respect to the problem dimension.
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Affiliation(s)
- Roel Van Beeumen
- Computational Research Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - David B Williams-Young
- Department of Chemistry, University of Washington , Seattle, Washington 98195, United States
| | - Joseph M Kasper
- Department of Chemistry, University of Washington , Seattle, Washington 98195, United States
| | - Chao Yang
- Computational Research Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Esmond G Ng
- Computational Research Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Xiaosong Li
- Department of Chemistry, University of Washington , Seattle, Washington 98195, United States
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66
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Goings JJ, Lestrange PJ, Li X. Real‐time time‐dependent electronic structure theory. WILEY INTERDISCIPLINARY REVIEWS-COMPUTATIONAL MOLECULAR SCIENCE 2017. [DOI: 10.1002/wcms.1341] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
| | | | - Xiaosong Li
- Department of ChemistryUniversity of Washington Seattle WA USA
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67
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Rossi TP, Kuisma M, Puska MJ, Nieminen RM, Erhart P. Kohn–Sham Decomposition in Real-Time Time-Dependent Density-Functional Theory: An Efficient Tool for Analyzing Plasmonic Excitations. J Chem Theory Comput 2017; 13:4779-4790. [DOI: 10.1021/acs.jctc.7b00589] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Tuomas P. Rossi
- COMP
Centre of Excellence, Department of Applied Physics, Aalto University, P.O.
Box 11100, FI-00076 Aalto, Finland
| | - Mikael Kuisma
- Department
of Physics, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden
- Department
of Chemistry, Nanoscience Center, University of Jyväskylä, FI-40014 Jyväskylä, Finland
| | - Martti J. Puska
- COMP
Centre of Excellence, Department of Applied Physics, Aalto University, P.O.
Box 11100, FI-00076 Aalto, Finland
| | - Risto M. Nieminen
- COMP
Centre of Excellence, Department of Applied Physics, Aalto University, P.O.
Box 11100, FI-00076 Aalto, Finland
| | - Paul Erhart
- Department
of Physics, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden
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68
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Bruner A, Hernandez S, Mauger F, Abanador PM, LaMaster DJ, Gaarde MB, Schafer KJ, Lopata K. Attosecond Charge Migration with TDDFT: Accurate Dynamics from a Well-Defined Initial State. J Phys Chem Lett 2017; 8:3991-3996. [PMID: 28792225 DOI: 10.1021/acs.jpclett.7b01652] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
We investigate the ability of time-dependent density functional theory (TDDFT) to capture attosecond valence electron dynamics resulting from sudden X-ray ionization of a core electron. In this special case the initial state can be constructed unambiguously, allowing for a simple test of the accuracy of the dynamics. The response following nitrogen K-edge ionization in nitrosobenzene shows excellent agreement with fourth-order algebraic diagrammatic construction (ADC(4)) results, suggesting that a properly chosen initial state allows TDDFT to adequately capture attosecond charge migration. Visualizing hole motion using an electron localization picture (ELF), we provide an intuitive chemical interpretation of the charge migration as a superposition of Lewis dot resonance structures.
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Affiliation(s)
- Adam Bruner
- Department of Chemistry, Louisiana State University , Baton Rouge, Louisiana 70803, United States
| | - Samuel Hernandez
- Department of Chemistry, Louisiana State University , Baton Rouge, Louisiana 70803, United States
| | - François Mauger
- Department of Physics and Astronomy, Louisiana State University , Baton Rouge, Louisiana 70803, United States
| | - Paul M Abanador
- Department of Physics and Astronomy, Louisiana State University , Baton Rouge, Louisiana 70803, United States
| | - Daniel J LaMaster
- Department of Chemistry, Louisiana State University , Baton Rouge, Louisiana 70803, United States
| | - Mette B Gaarde
- Department of Physics and Astronomy, Louisiana State University , Baton Rouge, Louisiana 70803, United States
| | - Kenneth J Schafer
- Department of Physics and Astronomy, Louisiana State University , Baton Rouge, Louisiana 70803, United States
| | - Kenneth Lopata
- Department of Chemistry, Louisiana State University , Baton Rouge, Louisiana 70803, United States
- Center for Computation & Technology, Louisiana State University , Baton Rouge, Louisiana 70803, United States
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69
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Egidi F, Sun S, Goings JJ, Scalmani G, Frisch MJ, Li X. Two-Component Noncollinear Time-Dependent Spin Density Functional Theory for Excited State Calculations. J Chem Theory Comput 2017; 13:2591-2603. [DOI: 10.1021/acs.jctc.7b00104] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Franco Egidi
- Department
of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Shichao Sun
- Department
of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Joshua J. Goings
- Department
of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Giovanni Scalmani
- Gaussian Inc., 340 Quinnipiac
Street, Building 40, Wallingford, Connecticut 06492, United States
| | - Michael J. Frisch
- Gaussian Inc., 340 Quinnipiac
Street, Building 40, Wallingford, Connecticut 06492, United States
| | - Xiaosong Li
- Department
of Chemistry, University of Washington, Seattle, Washington 98195, United States
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70
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Goings JJ, Lingerfelt DB, Li X. Can Quantized Vibrational Effects Be Obtained from Ehrenfest Mixed Quantum-Classical Dynamics? J Phys Chem Lett 2016; 7:5193-5197. [PMID: 27973884 DOI: 10.1021/acs.jpclett.6b02424] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We explore the question of whether mean-field or "Ehrenfest" mixed quantum-classical dynamics is capable of capturing the quantized vibrational features in photoabsorption spectra that result from infrared and Raman-active vibrational transitions. We show that vibrational and electronic absorption spectra can indeed be obtained together within a single Ehrenfest simulation. Furthermore, the electronic transitions show new sidebands that are absent in electronic dynamics simulations with fixed nuclei. Inspection of the electronic sidebands reveals that the spacing corresponds to vibrational frequencies of totally symmetric vibrational modes of the ground electronic state. A simple derivation of the time-evolving dipole in the presence of external fields and vibrational motion shows the origin of these features, demonstrating that mixed quantum-classical Ehrenfest dynamics is capable of producing infrared, Raman, and electronic absorption spectra from a single simulation.
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Affiliation(s)
- Joshua J Goings
- Department of Chemistry, University of Washington , Seattle, Washington 98195, United States
| | - David B Lingerfelt
- Department of Chemistry, University of Washington , Seattle, Washington 98195, United States
| | - Xiaosong Li
- Department of Chemistry, University of Washington , Seattle, Washington 98195, United States
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71
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Konecny L, Kadek M, Komorovsky S, Malkina OL, Ruud K, Repisky M. Acceleration of Relativistic Electron Dynamics by Means of X2C Transformation: Application to the Calculation of Nonlinear Optical Properties. J Chem Theory Comput 2016; 12:5823-5833. [DOI: 10.1021/acs.jctc.6b00740] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lukas Konecny
- Department
of Inorganic Chemistry, Faculty of Natural Sciences, Comenius University, 811
02 Bratislava, Slovak Republic
| | - Marius Kadek
- The Centre
for
Theoretical and Computational Chemistry, Department of
Chemistry, UiT The Arctic University of Norway, 9019 Tromsø, Norway
| | - Stanislav Komorovsky
- The Centre
for
Theoretical and Computational Chemistry, Department of
Chemistry, UiT The Arctic University of Norway, 9019 Tromsø, Norway
| | - Olga L. Malkina
- Department
of Inorganic Chemistry, Faculty of Natural Sciences, Comenius University, 811
02 Bratislava, Slovak Republic
- Institute
of Inorganic Chemistry, Slovak Academy of Sciences, Bratislava 814 38, Slovak Republic
| | - Kenneth Ruud
- The Centre
for
Theoretical and Computational Chemistry, Department of
Chemistry, UiT The Arctic University of Norway, 9019 Tromsø, Norway
| | - Michal Repisky
- The Centre
for
Theoretical and Computational Chemistry, Department of
Chemistry, UiT The Arctic University of Norway, 9019 Tromsø, Norway
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72
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Goings JJ, Kasper JM, Egidi F, Sun S, Li X. Real time propagation of the exact two component time-dependent density functional theory. J Chem Phys 2016; 145:104107. [DOI: 10.1063/1.4962422] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Joshua J. Goings
- Department of Chemistry, University of Washington, Seattle, Washington 98195, USA
| | - Joseph M. Kasper
- Department of Chemistry, University of Washington, Seattle, Washington 98195, USA
| | - Franco Egidi
- Department of Chemistry, University of Washington, Seattle, Washington 98195, USA
| | - Shichao Sun
- Department of Chemistry, University of Washington, Seattle, Washington 98195, USA
| | - Xiaosong Li
- Department of Chemistry, University of Washington, Seattle, Washington 98195, USA
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