[2] Haisch, with Alfonso Rueda, developed a speculative theory that the non-zero lowest energy state of the vacuum, as predicted by quantum mechanics, might provide a physical explanation for the origin of inertia, and might someday be used for spacecraft propulsion.
Since 2002, Haisch has been involved with ManyOne Networks and related Digital Universe projects that aim to produce, among other things, a multimedia online encyclopedia.
His primary research from the mid-1970s until the late 1990s was high energy astrophysics, specifically the ultraviolet and X-ray emissions from coronae and flares on the Sun and other late-type stars.
[3][4][5] The inertialess "SHARP drive" in Arthur C. Clarke's 3001: The Final Odyssey was named for Andrei Sakharov, Haisch, Rueda, and Harold E.
Since 2004, he also served as president of the now defunct Digital Universe Foundation, which, among other things, aimed to create a peer-reviewed alternative to English Wikipedia, seeking to provide a comprehensive and reliable account of current mainstream scientific theory, evidence, and belief.