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CHANGELOG
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CHANGELOG
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PySCF 1.7.6 (2021-03-28)
------------------------
* Added
- KMP2 2-particle density matrix
- PBC J, K matrices module rsjk (RangeSeparationJKBuilder)
- ADC (RADC, UADC, DFADC)
- Eigenvector analyzer for IP and EA, RADC and UADC
- Analytical nuclear gradients for state-average CASSCF
- Support SO3 symmetry
- ECP-SOC for GHF/GKS
- density fitting GMP2
- G0W0 approximations (analytic continuation, contour deformation)
- Auxiliary second-order Green's function perturbation theory (agf2)
- Smearing for molecules
- Visscher small component correction approximation for DHF
* Improved
- Threading safety in Mole temporary context
- Basis parser to support arithmetic expressions in basis data
- dmrgci interface refactored
- MP2 gradients performance
- Interface of polariazable embedding with integral batching
- Electron-phonon Hamiltonian module refactored
- Remove memorization of Ewald parameters.
- molden dumper refactored
* Fixed
- stack overflow in ecp integral code
- SCAN functional crashing problem
- Ghost atoms for IAOs/IBOs
- Fix fractional occupations for case of zero beta electrons
- mcscf project_init_guess
- Symmetry verification bug when deducting subgroup
- Mole.set_geom_ bug
- GDF with non-zero drop_eta (for diffused auxiliary basis)
- Paddings in KMP2 when remove_linear_dep_ is applied
- SC-NEVPT2 Sijr Srsi
PySCF 1.7.5 (2020-9-27)
-----------------------
* Added
- Upgrade cint library to v4
- Upgrade xcfun library to v2.1.0
- Kramers' restricted Dirac-Hartree-Fock, X2C, DHF-SOSCF
- Heavy elements basis in MINAO
- Coulomb integrals of short range part for attenuated Coulomb
- Polarizability and hyperpolarizability under PBC
* Improved
- Support pseudo potential Atomic HF
- Atomic HF for 1-electron system
- Check basis angular momentum in mol.intor (l < 7)
- FCIDUMP wrapper fcidump.py
* Fixed
- Bugs in Mole.fromstring
- Buffer size bug in DHF JK builder for very small systems
- Fix pbc-eom-eaccsd_star bug
- Bugs in integral screening for very tight direct_scf_tol
PySCF 1.7.4 (2020-8-2)
----------------------
* Added
- FCIDUMP reader to load FCIDUMP and generate custom system.
- Natural orbitals occupations to mc.mo_occ
- Supporting UHF orbitals in FCI factory function
* Improved
- Linear dependency treatment for basis uncontraction
* Fixed
- ECP gradients bug when the system contains two or more ecp atoms
- CHGCAR writer
- Basis parser for basis in Gaussian 94 format
PySCF 1.7.3 (2020-6-10)
-----------------------
* Added
- CcECP basis
- Spin 1RDM for shci
- PM localization for charge populations based on Becke partition
* Improved
- Compatibility of get_jk methods between mcscf class and scf class
- CPPE interface
- Interface between IAO and PM
* Fixed
- an CCSD integral bug introduced in 1.7.1
- Td as its subgroup C2v
- Fix an error when calculating grad of dft method with "HF" as xc
PySCF 1.7.2 (2020-5-13)
-----------------------
* Added
- Electron-phonon Hamiltonian under PBC (pbc.eph)
- State-average CASSCF example
- Spin density analysis to uhf.analyze()
- Passing point group and wfnsym to Dice
- Analytical nuclear gradients for PBC SCF methods (based FFTDF)
- Geometry optimizer and Gradients scanner for pbc
- ccECPs and corresponding basis sets
- Interacting hybrid method i-CCSD/MP2
- Allow FNOs to be specified by number of active virtuals
- Enable frozen natural orbital CC
- Partial Cholesky orthogonalization
- Use requested initial guess in DHF
* Improved
- libxc5 compatibility
- Redundant def2-*-jkfit basis sets were replaced by the def2-universal-jkfit basis
- FCIDUMP reader
- Treatment of breaksym in UHF init_guess function
- literature references and DOIs
- Ensure active orbitals are not changed during MCSCF canonicalization
- Improve linear dependency treatment in projection function in scf/addons.py
- Use customized get_xmat method for x2c if applicable
* Fixed
- Integral bug in magnetizability
- Integer overflow in multigrid
- pbc.mdf h5 file initialization
- density fitting auxiliary basis for cc-pV*Z
- Handle basis and pp for ghost atoms in pbc initialization
- ecp treatments for ghost atoms
- FCI wfnsym initial guess
- SCF initial guess for super-heavy elements
- Initial guess "atom" due to missing basis
- Bugs of prefix ghost
- Handle duplicated primitives in GAMESS WFN writer
PySCF 1.7.1 (2020-2-29)
-----------------------
* Added
- Equilibrium solvation for TDDFT
- ddcosmo TDDFT gradients to support TDDFT geometry optimization with solvent
- Polarizable embedding solvent model
- Non-canonical MP2
- Algebraic diagrammatic construction method
* Improved
- Atomic configuration in SCF initial guess
- IBO valence space configurations
- For icmpspt restart option and default settings
- TBLIS interface and compilation configurations
- DFT-KS initialization factory functions
- reset methods in many modules for scanner mode
- HF/KS conversion functions
- APIs for HF/KS response functions (used by TDDFT and other methods)
- transform_ci function to allow projection between FCI wavefunction in
different sizes
- The fractional occupancy atomic HF method in SCF initial guess
- Performance of non-local XC functional
- FCI Performance
- stability of linear equation solver in dynamic polarizability
- cubegen for PBC systems
* Bugfix
- Contributions of MM point charges in icmpspt energy
- ROHF and UHF orbital occupancy for negative mol.spin
- Four-component Dirac HF EFG tensor
- Avoid twice initialization in modules GDF, SGX etc.
- nuclear repulsion energy for single atom case
- MINDO gradients unit (from Hartree/Angstrom to Hartree/Bohr)
- Data prefetching bug in CCSD
- Total energy of CCSD and CISD with non-canonical HF reference
PySCF 1.7.0 (2020-1-1)
----------------------
* Added
- k-CCSD density matrix
- k-CCSD(T) with core frozen
- sgX method (a pseudo-spectral method like COSX)
- pre_kernel and post_kernel hooks in SCF driver
- Left eigenvectors of IP/EA-CCSD for molecular code
- EOM-IP/EA-KCCSD, EOM-IP/EA-KRCCSD
- Methods EOM-IP/EA-KCCSD(T) T*(a), EOM-IP/EA-KRCCSD(T) T*(a)
- kEOM-IP/EA-CCSD*
- KUMP2
- KCCSD function spatial2spin that transforms amplitudes in spatial orbital
representation to that in spin-orbital representation
- DOCI solver, DOCI-CASCI, and DOCI-CASSCf
- Support of RSH functionals in methods DF and sgX
- Add RSH functionals for all PBC DFT methods
- Semi-empirical method MINDO/3
- Analytical nuclear gradients with density-fitting
- Analytical nuclear hessian with density-fitting
- Thermo-chemistry and frequency analysis
- Huckel HF/KS initial guess
- QM/MM with implicit solvent
- Spin-Orbit ECP integrals
- Geometry optimization for state-average MCSCF method
- cube file parser
- Orbital localization methods VVO and LIVVO
* Improved
- Optimized regular get_j and density-fitting get_j
- Faster k-CCSD(T)
- Davidson diagonalization for multi-roots
- memory usage in CCSD
- Molecular orientation does not need to be changed when symmetry is enabled
- Performance of density fitting initialization
- Performance of JK-build function
- Using direct_spin1 as the default FCI solver
- Performance of SOSCF method (by using the direct-SCF technique)
- Performance of semi-incore AO-MO integral transformation
* Bugfix
- Carbon ANO data
- Initial guess for EOM-KCCSD
- state-average CASSCF analytical nuclear gradients
- ddCOSMO self-consistency (as fast solvent) for post-SCF methods
- range-separation parameter omega customization in RSH functionals
PySCF 1.6.6 (2020-1-1)
----------------------
* Improved
- Sanity check for Wigner-Seitz cell exchange kernel
- The linear dependency treatment for X2C uncontracted basis
- Energy cutoff estimation for non-orthogonal lattice
- Tolerance in geometry when detecting point group symmetry
* Fixed
- TDDFT symmetry representation
- cube file when containing ECP
PySCF 1.6.5 (2019-11-17)
------------------------
* Added
- spin_square method for UCCSD
* Improved
- Handling ".xc = None" (run DFT without exchange)
* Fixed
- Unit conversion bug between eV and wavenumber in TDDFT
- KGHF orbital gradients
- Analytical gradients for implicit solvent model in geometry optimization
PySCF 1.6.4 (2019-09-14)
------------------------
* Added
- aug-cc-pwCV*Z basis
* Improved
- Memory footprint of FCI module
- Mole.spin initialization. A guess can be made for spin multiplicity based on
neutral system.
* Fixed
- PBC SCF orbital canonicalization
- Missed complex conjugation in HF/KS modules
- SHCI runtime directory
- Normalization issue for Cartesian basis in Molden output
- cc-pwCV5Z basis
PySCF 1.6.3 (2019-07-28)
------------------------
* Added
- cube customization for cubegen
- Integral prescreening for RSH functional when evaluating K matrix
* Improved
- Performance of exchange integrals in RSH functionals
* Fixed
- handle xc = '' in eval_ao
- cube shape in cubegen
- Basis parser when parsing last elements in some basis set
- ROHF-SOSCF for diatomic molecules
PySCF 1.6.2 (2019-6-17)
-----------------------
* Added
- Slow version of KTDSCF and KGW methods for molecular systems
- Slow version of TDSCF and GW methods for PBC systems
- The support of various dtype (int, complex etc.) in numpy_helper functions
- Point group symmetry conservation in geometry optimization
* Improved
- DFHF class structure and method hooks
- Sanity checks when saving and loading FCIDUMP file
- Integral performance for solvent model
- Integral performance for QM/MM interface
- GCC 9 compatibility
* Bugfix
- Cartesian GTOs was not handled in RSH integrals
- geometric_solver for latest geomeTRIC release
- Initial guess of orbital localization solver
- MCSCF analyze function for state-averaged calculations
- The zero-norm bug in the non-hermitian matrix diagonalization function when
solving the complex eigenvectors for real eigenvalues.
- IOError when reading initial guess from chkfile in SCF scanner function
PySCF 1.6.1 (2019-03-15)
------------------------
* Added
- k-point orbitals to gamma-point orbitals transformation function k2gamma
- Wigner D-matrix and d-matrix
- The interface geometric_solver to geometry optimization library geomeTRIC
- k-CCSD(T) for PBC k-point sampled systems
- AO basis truncation shortcut "@?s?p?d"
- Function in basis parser to restore general basis contraction from NWChem
optimized format
- inertia_moment function in Mole object
- keyword resolution in CHGCAR writer
- IAO for each k-point in PBC systems
* Improved
- Geometry optimization module (GeometryOptimizer class, output format etc.)
- SCF Gradients class. A hook "extra_force" was added.
- MRLCC2 interface
- Import gradients, properties, solvent, and all post-SCF/extended methods in SCF class
- DFT-D3 interface
- Pople basis parser (supporting e.g. 6311++g(2d,p)).
- Normalizing SCF initial guess in PBC (to the right number of electrons/cell)
- mesh estimation for inf-vacuum
- Tuned threshold in point group symmetry detection functions
- SCF summary in the output message
* Bugfix
- Solvent object initialization in SCF scanner function
- GHF get_jk function
- QM/MM object initialization in SCF scanner function
- Missing virtual orbitals in MCSCF project_init_guess function
- MINAO basis data
- Analytical Fourier transform zero elements when basis functions do not overlap
- make_rdm1 function in state_average mcscf wrapper
PySCF 1.6 (2018-12-31)
----------------------
* Added
- DFT-D3 interface
- semi_incore ao2mo transformation
* Improved
- Linear dependency threshold of qr decomposition in davidson solver
- Optimized KUCCSD, EOM-KUCCSD performance
* Bugfix
- hasattr issue for attributes with @property
- DDCOSMO wrapper and kernel function
- Num eletrons bug in PBC smearing function for custom systems
- return value of NPTaggedArray ufunc (returning np array now)
- PBC density fitting dimension error caused by numerical noise when handling linear dependency
- Parsers for molpro basis and gaussian basis
- Selected-CI returned data type
PySCF 1.6 beta (2018-11-26)
---------------------------
* Added
- PBC k-point SCF stability analysis
- PBC KUCCSD
- PBC EOM-IP/EA-KRCCSD
- PBC EOM-IP/EA-KUCCSD
- Non-relativistic static and dynamic polarizability and hyper-polarizability tensor
* Improved
- The treatment of HF exchange in PBC system when calling PBC MP2, CISD, CCSD code
- Convergence performance of KCCSD iterations for low-dimension systems
* Bugfix
- Complex density in pbc.get_j function
PySCF 1.6 alpha (2018-08-15)
----------------------------
* Added
- X2C-UKS (LDA functional only)
- PBC gamma point ROHF/ROKS and GKS
- PBC KROHF/KROKS and KGKS for k-point sampling
- DFT Coulomb and XC integrals with multigrid
- Periodic UCCSD with k-point sampling
- perturbative DMRG method
- Interface to Cornell SHCI
- PBC dipole memont and Makov-Payne correction
- Overlap of two CISD wavefunctions
- EFG and Mossbauer spectroscopy of crystal and molecule
- Molecular magnetizability for HF and DFT
- ddCOSMO and ddPCM for MCSCF, MP, CI and CC methods
* Improved
- numint performance (eval_rho, eval_mat)
- Energy cutoff estimation
- CCSD convergency for 2D-PBC AFTDF, GDF and MDF methods
- Integral transformation performance in GW
PySCF 1.5.5 (2018-12-31)
------------------------
* Improved
- Fix symmetrization for k-point density in pbc.dft.numint.
- Molden parser to handle UHF orbitals
* Bugfix
- Get_fermi in KHF and KUHF
- Execute call in dmrgci
- Directories and paths in dmrgci
- Read of 3-pdm and 4-pdm produced by block-1.5
- Initialization wrapper in pbc.scf.__init__
- Complex density in pbc.get_j function
- Initial guess of KROHF method
- PBC get_jk interface when calling molecular MCSCF with pbc scf object
- keyword argument with_df of pbc.dft density_fit wrapper
PySCF 1.5.4 (2018-11-16)
------------------------
* Improved
- Add support for GTH pseudopotentials beyond d electrons
- Data structure of TDDFT response amplitudes (X, Y vectors): X[nvir,nocc] -> X[nocc,nvir]
* Bugfix
- OpenMP race condition in FCI solver
- Undefined HDF5 dataset in PBC MDF initialization
- TD-KRHF vind function
- SCF hessian
- interface between DMRG-CI and DMRG-NEVPT2. Making DMRG-NEVPT2 read Block
code settings in DMRG-CI.
- Dimension error in pbc.fftdf.get_jk for KUHF density matrix
- pbc.mpicc for keyword frozen
- Periodic pseudopotential calculations with ghost atoms
PySCF 1.5.3 (2018-09-06)
------------------------
* Bugfix
- get_jk prescreen for non-hermitian density matrices.
- Inaccurate estimation of memory usage in ccsd rdm.
- Frozen orbital EA-EOM-KRCCSD
- IOError due to 4GB chunk size limit in HDF5 library
PySCF 1.5.2 (2018-08-15)
------------------------
* Improved
- IO performance of pbc.GDF initialization
- Default linear dependence treatment in GDF to improve accuracy
* Bugfix
- Selected-ci 2-particle density matrices for two electron systems
PySCF 1.5.1 (2018-07-01)
------------------------
* Improved
- The memory usage for a large number of MM particles (issue #193)
* Bugfix
- Frozen orbitals in MCSCF canonicalization
- Dimension error when initializing DF-CCSD integral tensor
- EOM-EE-UCCSD initial guess and intermediates (issue #199)
- mpi ip/eaccsd w/ frozen orbitals
- the tdscf.get_nto function when mol.symmetry is enabled (issue #196)
- the interface between QMMM wrapper and the gradients of post-HF methods
PySCF 1.5 (2018-06-08)
----------------------
* Added
- Fake PySCF method adapter for arbitrary energy/gradients function in
berny_solver wrapper
- Function to restore DIIS object from DIIS file
- Restart function to restore CCSD calculations
* Improved
- CASSCF optimization step size
- State-averaged CASSCF output message
- RCCSD(T) and UCCSD(T) performance
- Reduced DIIS memory footprint
- Frozen orbitals for KRCCSD
- PBC-TDDFT eigenvalue filter to keeps more eigenvalues which has small
imaginary part
- FCI convergence tolerance
- Conversion between KRHF, KUHF, and KGHF
- In the SOSCF solver, the diagonalization code to handle singularity in Hessian
- In the Scanner function, to support an input of geometry (string or list)
- SCF convergence hook
- Density_fit hooks in mp2, cisd, and ccsd modules
- Warning for gapless system in ccsd
- Energy cutoff for PBC GDF method.
- XC functional parser to support '-' in XC name and XC functional
abbreviations (SVWN, BLYP, PBE, M05, etc.)
- Orbital frozen in core and virtual space for KMP2 and KCCSD modules
* Bugfix
- The ghost atom is now treated as a regular atom in berny_solver wrapper.
- QM/MM nuclear gradients
- Updating 6-31+G* basis which is now equivalent to the EMSL published basis
- Symmetry detection code to discover D2d, D4d, D6d group
- xcfun O3LYP functional which is now the same to libxc definition (but
different to the equation in the original paper)
- xcfun cam-b3lyp functional interface
- HCI wrapper to handle the system without beta electrons
- Dimension error for spinor integrals in general JK-build function
- The orbital ordering of the returned orbitals of the UHF stability analysis
- Filling up the upper triangular part for symmetry Hamiltonian in fcidump.read
- The attributes kpts and kpt of PBC SCF class when SCF data are loaded from
chkfile
- Nuclear Hessian in ECP and all-electron mixed systems
- Natural orbitals of state-averaged CASSCF
PySCF 1.5 beta (2018-04-15)
---------------------------
* Added
- ddCOSMO analytical nuclear gradients
- TDA and TDDFT analytical nuclear gradients for UHF and UKS
- CISD/GCISD/UCISD 1-particle transition density matrix
* Improved
- Memory usage of KRHF-KCCSD and IP/EA-EOM-KCCSD
* Bugfix
- Fock matrix of ddCOSMO and ddPCM method.
PySCF 1.5 alpha (2018-03-21)
----------------------------
* Added
- ddCOSMO solvent model
- VV10 NLC functional for molecule
- range-separated hybrid features for RKS and UKS, including
> Analytical nuclear gradients
> Second order SCF
> Hessian and frequency
> TDDFT
> TDDFT gradients
> NMR
- IAO and IBO for molecular and PBC systems
- UHF analytical nuclear Hessian
- UKS analytical nuclear Hessian
- FFT for low-dimension (2D) PBC systems
- Generalized CCSD (GCCSD)
- Generalized CCSD lambda solver
- Generalized Hartree-Fock with PBC
- PBC GCCSD and RCCSD with k-point sampling
- PBC GCCSD(T) and RCCSD(T) with k-point sampling
- RCCSD(T) and UCCSD(T) for non-canonical HF orbitals
- RCISD and UCISD analytical nuclear gradients
- RCISD, UCISD analytical nuclear gradients for excited states
- RMP2 and UMP2 analytical nuclear gradients
- UCCSD analytical nuclear gradients
- Frozen orbitals in MP2, CISD, CCSD, CCSD(T) nuclear gradients
- SF-X2C-1E analytical nuclear gradients
- SF-X2C-1E analytical nuclear hessian
- Analytical nuclear gradients and hessian for ECP integrals
- GIAO-ECP integrals for NMR shielding
- Interface to pyWannier90
- Restricted MP2 with k-point sampling
- RCCSD(T), UCCSD(T) and GCCSD(T) 1-particle and 2-particle density matrices
- RCCSD(T), UCCSD(T) analytical nuclear gradients
- CASCI/CASSCF analytical nuclear gradients
- CASCI analytical nuclear gradients for excited states
- Cartesian GTO (6d 10f) basis in PBC calculations
- Natural transition orbital analysis
- direct-RPA (no exchange, aka TDH)
- direct-TDA (TDA without exchange)
- Function to set OpenMP threads
* Improved
- Independent OpenMP threads in FCI solver
- Supported even number of grids in pbc calculations
- Performance of UCCSD lambda solver
- The function to get SCF initial guess from the chkfile of the molecule with
different geometry
- The mcscf natural orbitals in the state-average calculation
- Performance of ECP integrals
- Prescreening for PBC 3-center integrals
- Performance and memory efficiency of G0W0
- KMP2 memory efficiency
- Efficiency to evaluate the value of periodic AO on grids
- libxc parser to support the customized Range-separated XC functionals
PySCF 1.4.7 (2018-04-15)
------------------------
* Bugfix
- Outcore ao2mo transform when basis functions are cartesian Gaussians
- Fix errors in dmrg-nevpt interface, which overwrite nevpt configure files by
variational dmrg configure files.
- The order of elements of a list that are loaded by chkfile.load
PySCF 1.4.6 (2018-04-02)
------------------------
* Added
dip_moment method for ROHF class
PySCF 1.4.5 (2018-03-23)
------------------------
* Bugfix
- Numerical grids not converged in ECP integrals
- Python3 compatibility in shci module
PySCF 1.4.4 (2018-03-20)
------------------------
* Improved
- Non-Hermitian matrix diagonalization
- Symmetric grids in cubegen
- FCI initial guess when the system has Dooh or Doov symmetry
- Using stable sort when sorting orbital energies
- Attribute "e_tot" in the MP2 methods to access the total energy
* Bugfix
- meta-GGA density in dft.numint.eval_rho2
- intor parser in ao2mo module
- ecp parser if ecp data not found
- 1-electron system for UCCSD
- Python-3 compatibility for dmrgscf module
- Handling the errors which were raised in the background threads
- UHF/ROHF density matrices in nao localization method
PySCF 1.4.3 (2018-01-17)
------------------------
* Improved
- Assert convergence in geometry optimization
- Initial guess in SCF PES scanning
- Memory usage for generating Becke-grids in DFT
* Bugfix
- XC parser to support the scaled compound functional
- In the second order SCF algorithm, removing level_shift
- k-point RCCSD for non-canonical HF reference
- ECP integrals
PySCF 1.4.2 (2017-12-06)
------------------------
* Added
- Frank Jensen, Polarization consistent basis sets
* Improved
- Memory usage of pbc KHF calculation when HF exchange is computed with FFTDF
* Bugfix
- pyberny interface
- PBC GDF initialization for hybrid functional
- guess of wfn symmetry for given fci wfn
- Entropy of Gaussian smearing
PySCF 1.4.1 (2017-11-12)
------------------------
* Bugfix
- meta-GGA functional detection code in XC parser
- Orbital symmetry label in mcscf initial guess projection
- Eigenvalue ordering for Davidson eigen solver
- Madelung constant of non-orthogonal lattice
- Convergence of Madelung constant for huge number of k-points samples
- basis parser for pople-type basis
- RCCSD when running large number of virtual orbitals on small memory machine
PySCF 1.4 (2017-10-05)
----------------------
* Improved
- Kinetic energy cutoff estimation
- Density fitting default auxiliary basis
- Memory usage for FFTDF module
- libxc interface
* Bugfix
- KUHF dimension error in smearing function
- SCF results inconsistency in chkfile and SOSCF solver
- OMP stack overflow in GTO basis evaluator
- Default grids in DFT gen_grid function for system with ECP/PP
- mol.intor function to generate STG and YP integrals in 8-fold symmetry
- TDDFT analytical gradients
- DMRG-CI runtime scratch path
- PBC GDF integrals for auxiliary basis with g functions
- post-HF initialization function when mean-field object is DF-SOSCF method
- Single orbital localization
- Race condition in MP2 IO
PySCF 1.4 beta (2017-08-22)
---------------------------
* Added
- Generalized Hartree-Fock (GHF)
- Second order SCF solver for GHF
- non-relativistic UHF, UKS g-tensor (with various SOC approximations)
- non-relativistic UHF, UKS hyperfine coupling
- SHCI interface to Dice program
- spin-orbital CISD
- UCISD and UCISD 1- and 2-RDM
- Restricted CC2 method
- Density-fitting CCSD
- Heat-bath selected CI (HCI) spin-orbital 1- and 2-RDM
- "scanner" function for HF, DFT and CCSD to simplify energy or
gradients scanning for systems of different geometry.
- Interface to pyberny geometry optimizer (geometry optimization for
RHF, RKS and RCCSD are supported).
* Improved
- U-CCSD(T) performance
- Package structure (following "The Hitchhiker's Guide to Python")
- ECP basis localization in Mulliken pop analysis
- Changing the CASCI/CASSCF default FCI solver (the default solver will not
use spin symmetry for singlet state)
- Supporting remove_linear_dep function to handle basis linear dependence in
k-point SCF
- cell.rcut estimation for better integral accuracy
- Convergence rates of PM localization
- MP2 and RCISD integral transformation performance
- Disk usage of CCSD-DIIS
- Input basis parser to support union basis set (eg mol.basis=(bas1,bas2))
- SCF initial guess for systems with pseudopotential (or ECP)
- SCF initial guess for low-dimension PBC systems
* Bugfix
- wfnsym of FCI solver for Dooh symmetry
- In CIAH newton solver, the special treatment of negative hessian has
been revised.
- import lock which freezes threads for functions running in background
PySCF 1.4 alpha (2017-07-24)
----------------------------
* Added
- General function to evaluate Spinor GTO on real space grids
- Dirac-Kohn-Sham (LDA functional)
- EDIIS and ADIIS
- Periodic CCSD with k-point sampling
- Periodic EOM-IP-CCSD and EOM-EA-CCSD for single k-point calculation
- spin-square value (per unit cell) of KUHF calculation
- Update interface to fciqmc for standalone executing
- Routines in fciqmc to read in the spinned one and two RDMs
- Heat-Bath CI
- Functions in dmrgci interface to access 3-pdm and 4-pdm
- Function get_fermi
- UCCSD lambda equation and 1,2-particle density matrix
- SCF wfn stability analysis
- Many-Body van der Waals Interactions (MBD)
- Second order SCF solver for periodic HF and DFT
- TDDFT for periodic k-point HF and DFT
- U-TDHF and U-TDDFT for molecular and crystal systems
- Many-body dispersion
- MP2-F12 and F12 basis and F12 RI basis
- Cartesian GTO (6d 10f) basis in molecular calculations
- CP2K's HF pseudopotential data
- Frozen core MP2
- Molecular electrostatic potential (MEP)
- CPHF and UCPHF solver
- Non-relativistic RHF, UHF 4-component UHF spin-spin coupling
- non-relativistic UHF, 4-component UHF g-tensor (in testing)
- non-relativistic UHF, 4-component UHF hyperfine coupling (in testing)
- non-relativistic UHF zero-field splitting (in testing)
* Improved
- Performance of PBC-Gaussian function evaluator
- Performance of analytical Fourier transformation for AO product
- Performance of PBC 3-center integrals
- Performance of PBC PP local-part integrals
- Numerical stability associated to OpenMP reduce function
- Performance of FCI 2-electron contraction function
- Basis parser for Pople style basis sets
- Arbitrary problem size in FCI solver
- Symmetry labels in orbital coefficients
- Disk usage of integral transformation in MP2
- Performance of J/K contractions in molecular density fitting code
- Input geometry parser for ghost atoms
* Bugfix
- PBC super cell function. Atoms was missing on the super cell boundary
- PBC dft atomic grids for low-dimension systems
- The missing occ-vir blocks of Fock matrix in UCCSD
- MGGA integration error
* Removed
- Dependence to joblib library
PySCF 1.3.5 (2017-08-11)
------------------------
* Bugfix
- The undefined += operation (numpy issue #5241) in CISD and CCSD methods
PySCF 1.3.4 (2017-08-08)
------------------------
* Improvements
- Handle ghost atom in HF initial guess.
- Remove special treatments on CIAH negative hessians which often cause convergence problem
- Memory usage in CISD
- Proper treatment of ECP/PP in Mulliken pop analysis
* Bugfix
- For ROHF reference, CCSD function takes UCCSD method.
- Handle zero beta electrons in UCCSD.
- Fix bug in FCI solver when system has Dooh symmetry.
- Fix bug in KUHF gradients which affects newton SCF convergence.
- Fix bug in gradients of PM localization which affects convergence.
- Fix "hcore" initial guess for KHF.
- Fix bug in Mulliken pop analysis caused by wrong overlap matrix for PBC calculations.
PySCF 1.3.3 (2017-07-05)
------------------------
* Bugfix
- GIAO contributions to the off diagonal part of NMR shielding tensor.
- Handle zero core electrons in ECP parser.
- Handle zero occupied orbitals in CCSD module.
- Handle 1-electron system in UHF.
- Fix orbital ordering in SCF canonicalization when point group symmetry is used.
- Fix the missing fov term in UCCSD intermediates.
- Fix pbc atomic grids for low dimensional system.
- Avoid negative hessian in second order SCF solver.
- Fix bug in fci solver when system has cylinder spatial symmetry
- Fix eval_rho for GGA functional for non-hermitian density matrix
PySCF 1.3.2 (2017-06-05)
------------------------
* Bugfix
- CCSD frozen core when using AO-driven algorithm
- DFT UKS orbital hessian
- PBC gamma-point UHF exxdiv=ewald correction
- KUHF get_bands function
PySCF 1.3.1 (2017-05-14)
------------------------
* Bugfix
- CISD output message for multiple roots
- UHF hessian function in the second order SCF solver
- Integer overflow in npdot
- Module import error in PBC second order SCF solver
- Update makefile due to the bugfix in libcint library
PySCF 1.3 (2017-04-25)
----------------------
* Improved
- Treatment of auxiliary basis linear dependence in PBC DF/MDF module
- Cutoff radius in real space lattice summation for better accuracy
- PBC get_bands to compute the bands of arbitrary input k-points
- Ewald sum convergence
- Atomic grids in PBC DFT calculation
* Bugfix
- Analytical Fourier transformation for non-orthogonal lattice
- Spinor integral buffer size when kappa!=0
- AVAS active space when mol.symmetry is enabled
- Input parser for Gaussian nuclear model
- Sorting CISD RDM2 in Chemist's ordering
- runtimeDir in dmrg interface
- numpy.exp overflow in PBC smearing function
- The FFT-based MO integrals in compressed format
- Input parser to handle unicode
- UHF spin-square function for complex orbitals
- Setfault in FCI 4-particle transition density matrix
* Removed
- The cache of PBC AO value on grids
- Split-fitting MDF module
PySCF 1.3 beta (2017-02-15)
---------------------------
* Added
- sf-X2C for PBC Hamiltonian
- Overlap of two CI wavefunctions over different orbital bases
- EOM-CCSD for user guess, Koopmans' excitations, etc
- Approximate EOM-CCSD (MBPT2 ground state and partitioned EOM Hbar)
- AVAS method for constructing mcscf active space
- Molpro XML file reader and interface to read Molpro orbitals
- UCCSD
* Improved
- EOM-EE-RCCSD and EOM-EE-UCCSD performance
- memory usage of the non-symmetric Davidson solver in EOM-CCSD
PySCF 1.3 alpha-2 (2017-01-04)
------------------------------
* Added
- Supports for 1D, 2D PBC systems
* Improved
- Integral transformation for PBC 2-electron integrals
- CASSCF state-average interface to handle sub-solvers of different spins
- Numerical stability for Davidson diagonalization solver
- Numerical stability of FCI contraction function under multithreading environment
- FCI 2-electron contraction function with point group symmetry
* Bugfix
- X2C to use custom basis for X matrix
PySCF 1.3 alpha-1 (2016-12-04)
------------------------------
* Added
- Quantum chemistry ECP for solid
- AO-direct RCCSD
- CI coefficients transformation for one-particle basis rotation
- CIAH second order SCF solver for PBC KRHF and KUHF methods
- CISD and CISD 1, 2-particle density matrices
- Selected-CI and Selected-CI 1, 2-particle density matrices
- Smearing for PBC mean-field calculation
- PBC density fitting
* Improved
- Performance of CCSD(T)
- Change the default kpts mesh (to always include gamma point)
- PBC repeated images used by lattice summation
PySCF 1.2.3 (2017-04-24)
------------------------
* Bugfix
- PBC 2e integrals for wrap-around k-points
- CI coefficients in GAMESS WFN format
- Input parser for Gaussian nuclear model
- Density fitting outcore module for user input auxiliary basis
PySCF 1.2.2 (2017-02-15)
------------------------
* Bugfix
- GTO normalization in molden file
- multi-threading dgemm
PySCF 1.2.1 (2017-01-26)
------------------------
* Added
- transition metal BFD basis
- script to fix dylib library dependence for Mac
* Bugfix
- active space 1pdm in mc chkfile if natural orbitals are required
- dmrg example
- state-average dmrgci interface
- analytic GTO-PW integral
- for population analysis when ecp is presented.
- for mcscf state-specific function to support ground state as the target state
- get_coulG round-off bug
- unit cell size estimation for non-orth crystals
- lib.norm function for complex vector
PySCF 1.2 (2016-11-07)
----------------------
PySCF 1.2 beta (2016-09-13)
---------------------------
* Added
- State average CASSCF helper function for mixed spin/spatial-symmetry FCI solvers
- Example for transition dipole momentum
- U-CCSD (based on spin-orbital formulation)
- IP/EA/EE-EOM-CCSD
- Function to dump CASSCF canonical orbitals in molden format
- Analytical Fourier transformation for AO and AO product
- Co-iterative augmented hessian (CIAH) orbital optimizer
- Optimized einsum function using numpy.tensordot function
- Burkatzi-Filippi-Dolg pseudo potential
- FCI solver to support integrals which do not have 8-fold symmetry
- Dual interface to call pyFFTW or numpy.fft
- Maximum overlap method (MOM) method for SCF method
* Improved
- Memory usage for MDF method (molecular and PBC systems)
- PBC AO value evaluation performance
- Orbitals space symmetrization
- CASSCF subspace (core, active, external) symmetrization
- Created X2C object to hold X2C functions and parameters
- Boys, Edmiston, Pipek-Mezey Localization with general CIAH optimizer
- PBC integrals to handle ghost atom in PBC calculation
- Asynchronized IO to overlap integration and IO for ao2mo integral transformation
- SCF gradients to eliminate the symmetry forbidden matrix elements
- Fixing orbital ordering for degenerated SCF orbitals
- Efficiency of transpose_sum function
- FCIDUMP output format
* Bugfix
- CASSCF/QMMM interface for the missing term in nuclear repulsion
- Screening small density for MGGA functionals
- Molden interface to handle symmetry broken orbitals
- MP2 density matrix to include HF DM
PySCF 1.2 alpha (2016-8-5)
--------------------------
* Added
- MDF (mixed density fitting) method for molecule and PBC 2-election integrals
- GAMESS WFN wirter
- Periodic boundary condition (PBC) for gamma point RHF, UHF, RKS, UKS
- PBC RHF, UHF, RKS, UKS with k-point sampling
- PBC AO integrals
- PBC MO integral transformation
- PBC density fitting
- IC-MPS-PT2
- DMET decomposition to generate CASSCF active space
- FCI electron-phonon coupling solver
- meta-GGA for ground state DFT
Version 1.1 (2016-6-4):
* Improved
- "unc-" prefix for uncontracted basis in the input
- linear dependence problem in mcscf.project_init_guess
* Bugfix
- CCSD(T) rdm
- CASCI.analyze for multiple CI roots
- function to write FCIDUMP when system has symmetry
Version 1.1 beta (2016-4-11):
* Added
- Orbital hessian for SCF Newton solver
- (maximum overlap method) for Delta SCF
- determinant overlap
- Canonicalization flag for Newton solver
* Improved
- Default density fitting basis for heavy atoms
- Density fitting MCSCF to allow inputing 3-center integrals
- Rewriting NEVPT2 interface
- Mole object serialization with json
- Orbital energy output format for ROHF
* Bugfix
- meta-lowdin orthogonalization for high angular memontum basis
- Orbital occupancy for ROHF with symmetry
- CASSCF initializing from x2c-UHF
- ECP accuracy
- QMMM interface
Version 1.1 alpha-2 (2016-3-8):
* Added
- CCSD(T) and CCSD(T) gradients
- General JK contraction function
- RHF analytical nuclear Hessian
- RKS analytical nuclear Hessian
- Function to symmetrize given orbital space
- General XC functional evaluator (using Libxc or Xcfun)
- Intrinsic Atomic Orbital (IAO)
* Improved
- NEVPT interface