Holtzman drive

Holtzman drive

The effect is used in this case to fold space at the quantum level, allowing the Spacing Guild's heighliner ships to instantaneously travel far distances across space without actually moving at all. However, the chaotic and seemingly non-deterministicquantum nature of "foldspace" requires at least limited prescience on the part of the human navigator; otherwise the absurdly complex mathematics involved in producing reliable physical projections of such events would only be possible with advanced computers, which are strictly prohibited because of mankind's crusade against thinking machines, the Butlerian Jihad. To this effect, the Guild produces melange-saturated Navigators who intuitively "see paths through foldspace" in this way. This stumbling block is overcome several thousand years after the events of Dune when Ixian scientists develop mechanical replacements for Guild Navigators.