Hans Lischka (born July 26, 1943) is an Austrian computational theoretical chemist specialized on development and application of multireference methods for the study of molecular excited states.

[2] He is the main developer of the software package Columbus[3] for ab initio multireference calculations and co-developer of the Newton-X program.

[4] In 1980, he was a visiting professor with Isaiah Shavitt at the Ohio State University, where he started the development of a set of codes for multireference calculations in collaboration with Ron Shepard, Frank Brown, and Russel Pitzer.

[6] 2008 International Symposium on “Electron Correlation and Molecular Dynamics for Excited States and Photochemistry”, International Symposium in honor of Hans Lischka's 65th birthday, July 4, 2008 Hans Lischka has published over 500 scientific papers, which have been cited more than 24,000 times with h-index=80, according to Google Scholar.

[10] In 2010, Lischka's group published the first ab initio mapping of the deactivation mechanism of UV-excited canonical nucleobases.