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ORCA

Das Programm ORCA ist ein modernes elektronisches Strukturprogrammpaket, geschrieben von Prof. F. Neese, mit Beiträgen von Ute Becker, Dmytro Bykov, Dmitry Ganyushin, Andreas Hansen, Robert Izsak, Dimitrios G. Liakos, Christian Kollmar, Simone Kossmann, Dimitrios A. Pantazis, Taras Petrenko, Christoph Reimann, Christoph Riplinger, Michael Roemelt, Barbara Sandhöfer, Igor Schapiro, Kantharuban Sivalingam, Frank Wennmohs, Boris Wezisla und Beiträgen unserer Mitarbeiter: Mihály Kállay, Stefan Grimme, Edward Valeev. Die Binärpakete von ORCA sind für akademische Anwender für eine Vielzahl von Plattformen kostenlos verfügbar.

ORCA ist ein flexibles, effizientes und einfach zu bedienendes Universalwerkzeug für die Quantenchemie mit besonderem Schwerpunkt auf spektroskopischen Eigenschaften von Open-Shell-Molekülen. Es bietet eine breite Palette von quantenchemischen Standardmethoden, die von semiempirischen Methoden über DFT bis hin zu Single- und Multireferenz korrelierten ab initio-Methoden reichen. Es kann auch Umwelt- und relativistische Effekte behandeln.

Aufgrund des benutzerfreundlichen Stils gilt ORCA als hilfreiches Werkzeug nicht nur für Computerchemiker, sondern auch für Chemiker, Physiker und Biologen, die daran interessiert sind, den vollen Informationsgehalt ihrer experimentellen Daten mit Hilfe von Berechnungen zu entwickeln.

Eine vollständige Liste der Möglichkeiten von ORCA finden Sie in unserem aktuellen Referenzhandbuch.

Frank Wennmohs

Dr. Frank Wennmohs

2018
Projektleiter am Max-Planck-Institut für Kohlenforschung
bis 2017
Projektleiter am Max-Planck-Institut für Chemische EnergieKonversion

Forschungsthemen

ORCA - An ab initio, DFT and semiempirical SCF-MO package

ORCA - An ab initio, DFT and semiempirical SCF-MO package

The program ORCA is a modern electronic structure program package written by Prof. F. Neese, with contributions from Ute Becker, Dmytro Bykov, Dmitry Ganyushin, Andreas Hansen, Robert Izsak, Dimitrios G. Liakos, Christian Kollmar, Simone Kossmann, Dimitrios A. Pantazis, Taras Petrenko, Christoph Reimann, Christoph Riplinger, Michael Roemelt, Barbara Sandhöfer, Igor Schapiro, Kantharuban Sivalingam, Frank Wennmohs, Boris Wezisla and contributions from our collaborators: Mihály Kállay, Stefan Grimme, Edward Valeev. The binaries of ORCA are available free of charge for academic users for a variety of platforms.

ORCA is a flexible, efficient and easy-to-use general purpose tool for quantum chemistry with specific emphasis on spectroscopic properties of open-shell molecules. It features a wide variety of standard quantum chemical methods ranging from semiempirical methods to DFT to single- and multireference correlated ab initio methods. It can also treat environmental and relativistic effects.

Due to the user-friendly style, ORCA is considered to be a helpful tool not only for computational chemists, but also for chemists, physicists and biologists that are interested in developing the full information content of their experimental data with help of calculations.

For a complete list of ORCA's capabilities, see our current reference manual.

New Features:

1) The parallelization of the program is now completed. All modules, including MRCI, are now parallel. Parallel performance has been improved in numerous cases.

2) A new module for performing efficient spin adpted single excitation configuration interaction calculations for open shell systems (ROCIS). This is particularly powerful for the calculation of transition metal L-edge X-ray absorption spectra. It is parallelized

3) A new module performing molecular dynamics calculations with ORCA. Also available for methods that only feature numerical gradients.

4) MDCI module:

  • Orbital optimized coupled cluster version for RHF and UHF (also parallelized)
  • Brückner coupled cluster (including triples) for RHF and UHF
  • SEIO functional for orbital invariant, stationary coupled pair calculations
  • Open shell LPNO-CEPA,QCISD and CCSD methods
  • Parameterized CCSD (pCCSD) in canonical and LPNO versions (RHF and UHF)

5) CASSCF:

  • Relativistic CASSCF for the variational treatment of spin orbit coupling. Also uses symmetry.
  • Projection SOC states on spin-free states possible
  • Kramers restricted RELCAS
  • Numerous improvements in NEVPT2 (COSMO, Trajectories and scans, Direct-RI modeless storage)
  • Improved convergence and convergence aids (... but we are still working on this)
  • Spin-Spin coupling in QDPT CASSCF/NEVPT2 for magnetic properties
  • Determinant based full CI program added for the CI step

6) MRCI

  • Fully parallelized including the QDPT procedure for magnetic properties

7) General/Misc. improvements

  • VDW10. Latest dispersion correction from the group of Grimme
  • Nonlocal DFT-NL for incorporation of dispersion in DFT
  • PW6 B95, PWP B95, RI-PWP B95 functionals
  • Rappoport/Furche optimized basis sets for properties
  • Basis set extrapolation now works also with def2 basis sets
  • Densities for interactive orca_plot
  • Differences and transition densities in orca_plot
  • Natural orbitals for unrelaxed MP2 density
  • SOS-MP2, SOS-RI-MP2, SOS-OO-RI-MP2 energies + gradients
  • DKH picture change for g-tensors
  • Overlap fitted RIJCOSX procedure leads to further speedups and improvements in accuracy
  • Libint2 for more efficient integral evaluation (uses contraction)
  • Parallelization of point charge correction for QM/MM
  • Interface to the MRCC program by Mihály Kállay
 

Mitarbeiter

Filter | Mitarbeitersuche

All A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
  •  Ute Becker

    Becker, Ute

    +49(0)208/306-3580

    ute.becker((atsign))kofo.mpg.de

     

  •  Dagmar Lenk

    Lenk, Dagmar

    +49 (0)208 306 - 3584

    dlenk((atsign))kofo.mpg.de

     

  • Dr. Dimitrios Liakos

    Dr. Liakos, Dimitrios

    +49 (0)208 306 - 3888

    dgliakos((atsign))kofo.mpg.de

     

  •  Kantharuban Sivalingam

    Sivalingam, Kantharuban

    +49 (0)208 306 - 3580

    kantharuban.sivalingam((atsign))kofo.mpg.de

     

  • Dr. Frank Wennmohs

    Dr. Wennmohs, Frank

    +49 (0)208 306 - 3598

    frank.wennmohs((atsign))kofo.mpg.de

     

Links

ORCA-Forum
ORCA Referenz Manual

Kommerzielle Nutzer der ORCA-Software wenden sich bitte an:
www.faccts.de

Bei Fragen zur ORCA Lizensierung schicken Sie bitte eine Mail an:
orca.license@cec.mpg.de