Interdimensional travel

Interdimensional travel is defined as transit outside the borders of the four dimensions of our common space-time continuum.

Interdimensional travel can refer to many forms of FTL travel where the vessel, instead of making a transition to tachyonic matter, avoids the tachyonic boundary altogether by making a "short cut" through another realm of space-time paraller to our own in the Universe. Such technologies are referred to as Dimensional Propulsion Systems (DPS).

Common FTL drives that employ interdimensional travel are the PBDPS Drive, the TWDPS Drive, and several other such systems.

Spectral diagram

The Spectral Diagram illustrates the similarities of the multidimensional universe and the nature of electromagnetic radiation; the properties of both can be shown in a two-dimensional linear logarithmic diagram. Much like visible light is only a certain set of wavelengths of electromagnetism, our local spatial dimension is only a part of a larger set of dimensional "wavelengths" which increase and decrease exponentially.

Other common forms of FTL travel

FTL travel methods that do not involve interdimensional travel as it is commonly thought of, include Hyperdrive and Subspace Drive. While Hyperdrive accelerates matter into a form of tachyonic matter called imaginary matter, vessels employing the Subspace Drive never enter a tachyonic state at all. Instead, they move through space inside a localized sub-spatial phenomenon referred to as the "Warp bubble". While this is indeed a short cut, Subspace, like Hyperspace, is not a separate dimensional continuum of its own; rather, it is a property of our own particular space-time. Therefore, in both cases, the traveler never exits our dimension during transit. This is also the case with wormhole travel.