Release Log for Q-Chem 5.3

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Q-Chem 5.3.1 Release

August 31, 2020, updated on September 3, 2020

Changes in Default Settings

  • Dispersion energy is now automatically produced in ALMO-EDA calculations with ECPs

New Features and Improvements

DFT and SCF improvements:
  • Enabled RCA-DIIS algorithm in jobs that request FRAGMO SCF guess (Yuezhi Mao)
  • Enabled RCA-DIIS algorithm in DFT jobs with non-local correlation (Yuezhi Mao)
  • Enabled damping in conjunction with the level-shifting DIIS algorithm
  • Extended availability of density functionals to include range-separated functionals when using BrianQC
  • Resolved issues with:
    • performance regression in incremental Fock builds
    • logic error that caused SCF jobs using the DIIS-DM algorithm to crash (Yuezhi Mao)
    • performance regressions in the evaluation of Fock matrix nuclear derivatives
    • exchange-correlation nuclear gradients to be reported as NaN for some large molecules
    • BASIS=MIXED in some FRAGMO and EDA calculations (Yuezhi Mao)
    • calculations invoking the HFPC/DFPC (John Herbert)
    • using AUTOSAD and FRAGMO SCF guesses for post-SCF calculations (Yuezhi Mao)
    • interperting input EXCHANGE=Becke (Yuezhi Mao)
    • crashing static hyperpolarizability calculations with MOPROP=103
    • geometry optimization using ROKS (Yuezhi Mao)
    • evaluation of transition dipole moments using delta-SCF and ROKS (Diptarka Hait)
    • out of memory errors in large DFT vibrational frequency calculations
    • numerical errors in gradient and hessian of Grimme's empirical dispersion corrections
CIS and TDDFT improvements:
  • Enabled wavefunction analysis between SF-TDDFT states, resolved a number of issues with SF-TDDFT state analysis (Felix Plasser)
  • Added sample inputs demonstrating XAS and XES TDDFT capabilities (John Herbert)
  • Resolved issues with:
    • erroneously reported zero spin-orbit couplings in some large TDDFT calculations
    • including the empirical dispersion contribution in excited states gradients (Yuezhi Mao)
Correlated methods improvements:
  • Added capability to evaluate g-tensor using CCSD (Sven Kaehler)
  • Resolved issues with:
    • crash in some RIXS EOM-CC calculations (Kaushik Nanda)
    • out of memory error during computation of RI-CASSCF energies with large RI basis sets
    • CCVB calculations for large systems (Alan Rask)
Solvation and QM/MM improvements:
  • Restored capabilities to have fractional nuclear charges in QM/MM calculations (John Herbert)
  • Resolved an issue causing MM optimizations with over 10,000 atoms to crash (John Herbert, Sahil Gulania)
  • Added capability to use Poisson boundary conditions in systems with ECPs (John Herbert)
Energy decomposition analysis improvements:
  • Enabled visualization of ALMOs in standalone SCF-MI calculations (Yuezhi Mao)
  • Added plots for NOCV pair contribution to difference density in EDA2 (Yuezhi Mao)
  • Resolved an issue with EDA_PRINT_COVP=AUTOMATED in ALMO-EDA jobs (Yuezhi Mao)

Q-Chem 5.3.0 Release

June 16, 2020, updated on June 22, 2020

Changes in Default Settings

  • Renamed rem variable ADIABATIC_CTA to VFB_CTA
  • Changed ROHF_DIAG_SPEC default from 0 to 2 for ROHF and set GEN_SCFMAN as default ROSCF engine

New Features and Methods

General improvements:
  • Added support for the jun-cc-pvdz basis set (K. Carter-Fenk)
New features and improvements to the DFT capabilities:
  • TD-DFT analytic force and frequencies for meta-GGA density functionals
  • Level shifting in DIIS for better SCF convergence in difficult cases
  • M06-SX density functional (P. Morgante, R. Peverati)
  • HF-3c method (B. Rana, J. Herbert)
New features and improvements in the CC/EOM-CC package:
  • Calculation of RIXS and orbital analysis of RIXS transition moments (K. Nanda, A.I. Krylov)
  • New features in the CVS-EOM-CC suite (M. Vidal, S. Coriani)
  • Energies and properties for EOM-DEA-CCSD (S. Gulania, M. Ivanov, A.I. Krylov)
  • Transition properties and S2 for EOM-DIP-CCSD (S. Gulania, W. Skomorowski, A.I. Krylov)
  • New NLO properties (hyperpolarizabilities) in EOM-CC (K. Nanda, A.I. Krylov)
  • New tools for strongly correlated and magnetic systems: Extention of FNO to open-shell systems (P. Pokhilko, A.I. Krylov)
  • Construction of effective Hamiltonians from EOM-CC wavefunctions (P. Pokhilko, A.I. Krylov)
  • NTO analysis of spin-forbidden transitions (P. Pokhilko, A.I. Krylov)
  • Search for special points of complex PES (minima, MECP, and exceptional points) within CAP-EOM-CCSD (Z. Benda, T.-C. Jagau)
  • Voronoi CAP and projected CAP methods (J. Gayvert, K. Bravaya)
  • New tools for computing Auger decay rates and resonance lifetimes by the Feshbach-Dyson method (W. Skomorowski, A.I. Krylov)
  • Stability improvements in EOM-CC (P. Pokhilko, A.I. Krylov)
New features and improvements in MP2 methods:
  • Geometry optimization with regularized orbital-optimized second-order Moller-Plesset perturbation theory (kappa-OOMP2) (Joonho Lee, M. Head-Gordon)
New capabilities for intermolecular interactions:
  • Implementation of the XSAPT+MBD method (K. Carter-Fenk, J. Herbert)
QM/MM improvements:
  • L-BFGS algorithm for geometry optimization (B. Rana and J. Herbert)
  • Harmonic confining potentials (S. Dasgupta and J. Herbert)
New methods and capabilities:
  • Nuclear electronic orbital DFT and TD-DFT methods (F. Pavosevic, Zhen Tao, S. Hammes-Schiffer)
  • New module for RAS-SF methods (S. Houck, N. Mayhall)
  • A family of configuration-interaction methods: non-orthogonal configuration interaction singles (NOCIS), static exchange (STEX), and one-center NOCIS (K. Oosterbaan, M. Head-Gordon)
  • Integral screening and resolution-of-the-identity capabilities for complex basis functions (T.-C. Jagau)
  • RI-MP2 method for complex basis functions (M. Hernandez Vera, T.-C. Jagau)
  • New method (concentric localization) for truncating the virtual space in projector-based embedding theory (Yuezhi Mao)
  • Square gradient minimization for excited state orbital optimization (D. Hait, M. Head-Gordon)
  • Resonance Raman spectroscopy simulation (S. Dasgupta, B. Rana, J. Herbert)
  • Population analysis of antibonding orbitals (A. Aldossary)
  • Fragment-based diabatization schemes (Yuezhi Mao)
  • Enabled ghost atoms without basis functions (B. Alam and J. Herbert)
  • Electron localization function (A. Bushra, J. Herbert)
  • New input options for wavefunction analysis (F. Plasser)
New features of the BrianQC GPU module:
  • Extended support for GPU accelerated DFT exchange-correlation with support for LDA, GGA, and meta-GGA functionals
  • Partially GPU accelerated DFT frequency calculations

Other Fixes and Improvements

  • Added NTO/NBO plots for multiple CIS/TDDFT states with the new format of \$plots input section
  • Added capability to produce AIMPAC WFN files in GEN_SCFMAN (J. Herbert)
  • Improved readability of SAPT output (J. Herbert)
  • Added spin density plots capability using ALMO-EDA (Yuezhi Mao)
  • Added visualization of fragment orbitals using ALMO-EDA (Yuezhi Mao)
  • Resolved a numerical problem with zero initial gradient in the GDM algorithm for SCF (Yuezhi Mao)
  • Resolved an issue with SCF convergence during geometry optimization with SM8 (Yuezhi Mao)
  • Resolved an issue with frozen active-space ROHF calculation giving inconsistent results (Yuezhi Mao)
  • Resolved an issue causing not-a-number errors when evaluating empirical D3 corrections
  • Resolved multiple issues with the Poisson-Boltzmann solver (C. Stein)
  • Resolved an issue with the normalization of vectors in CVS-EOMIP-CCSD (P. Pokhilko and A.I. Krylov)
  • Resolved an issue preventing the computation of CCSD to EOM-EE transition properties (P. Pokhilko)
  • Resolved an issue with unrestricted EOM-DIP transition properties (P. Pokhilko)
  • Resolved EOM convergence issues due to violation of permutational symmetry (P. Pokhilko)
  • Resolved an issue with EOM two-photon absorption due to an incorrect prefactor in the response equation (K. Nanda)
  • Resolved an issue with evaluating Hirshfeld charges for open-shell systems with basis sets containing high angular momentum functions (Yuezhi Mao)
  • Resolved an issue that caused SOS-ADC(2) computations to crash
  • Resolved issues with using user-specified MM force field parameter file
  • Resolved an issue preventing BSSE computations from properly executing (Yuezhi Mao)
  • Resolved an issue causing incorrect SM12/CM5 solvation energies (Yuezhi Mao; note: only development versions of Q-Chem were affected by this issue)
  • Resolved an issue with ghost atoms in PCM calculations (Yuezhi Mao)
  • Resolved an issue with wavefunction analysis in QM/MM (J. Herbert)
  • Resolved an issue with missing MM energies in QM/MM calculations (Yuezhi Mao)
  • Resolved multiple issues in ALMO-EDA (Yuezhi Mao)
  • Resolved an issue causing ALMO-EDA computations to terminate abnormally on Windows
  • Restored the behavior of EDA_ALIGN_FRGM_SPIN as documented (Yuezhi Mao)