The science of Symmetry: Subspace

Story by Jaffea on SoFurry

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Subspace

Subspace is an alternate form of

spacetime used for faster than light travel and communications. Contrary to its

suggestive colloquial name, it is not a higher dimension or alternate universe,

but instead is simply an altered form of normal spacetime which possesses

covariant laws of physics. 

Subspace travel is facilitated via

the production of gravitational bosons known as gravitophotons. Gravitophotons are the particles responsible for

transmitting the gravitomagnetic force exploited in modern gravitational

technology. In gravitophoton generators, pairs of the bosons are generated via

pair production- one with positive energy density and the other with negative

energy density. The gravitophoton possessing negative energy (and consequently

transmitting an attractive force) interacts with matter to produce a

gravitomagnetic field, resembling a magnetic field but exhibiting the

universally-attracting properties of gravitation- with a vastly larger coupling

constant, of course, making the generation of powerful gravitational fields a

trivial matter via a rotating superconductor.

The gravitophoton possessing positive energy (exhibiting a repulsive

gravitomagnetic force, but with a vastly reduced

coupling constant, barely interacting with matter), however, soon decays

quickly into a particle known as a quintessence

particle. The quintessence particle is responsible for mediating the

gravitational interaction between matter and dark energy (latent energy of the spacetime

field); consequently, whenever one is produced, matter exchanges momentum with

the spacetime field, leading to a small expansion of spacetime and a consequent

increase in dark energy.

The important fact to consider is

that the increase in dark energy results in a local decrease in inertial mass due to the relativistic relationship of

momentum and inertial mass. The contribution from the negative (attractive) gravitophoton

and the dark energy normally cancel out exactly, however, leaving the inertial mass

of the object unchanged. There is a process, however, involving the production

of anyons which can cause a disproportionately large number of quintessence

particles to form, causing a local decrease in inertial mass not entirely

balanced by the negative gravitophoton. Then, because of relativistic

conservation of energy, the speed of light must increase such that c' > c.

This causes the local properties

of spacetime to be altered in the vicinity of the quintessence field. The speed

of light increases, inertial mass decreases (allowing higher velocities than

normal), and the gravitational constant varies in ways such that the laws of

physics remain covariant within the altered spacetime field. Matter in a

Subspace field follows the same exact laws of physics as matter in normal

spacetime, but the exact coefficients for the various physical constants are

altered, allowing matter to travel faster than what it normally could in normal

spacetime.

The physical manifestation of

Subspace fields is differing depending on their strengths. Low-level Subspace

fields are commonly used to locally reduce inertial mass and make objects less

strenuous and costly to move. When Subspace fields of sufficient power form,

the fabric of spacetime is distorted such that it is visible to the naked eye. Such

a powerful Subspace field is used for faster than light travel and is commonly

referred to as a Subspace rupture,

even though that term is somewhat of a misnomer. The field is not at all a "rupture"

in spacetime, such as a black hole, but is instead a typical Subspace field

with a speed of light discrepancy high enough to become visible to the naked

eye.

The reason that powerful Subspace

fields are visible to the naked eye is due to a combination of diffraction and

spatial expansion. The speed of light inside a field is much higher than it is

outside said field, refracting whatever light enters and consequently

generating a visible distortion. The latter reason, spatial expansion, is an

expected phenomenon upon the rapid increase in the energy of the local dark

energy field. Spacetime expands as a result of dark energy, and having such a

tremendous degree of the energy in a local region can visibly distort

spacetime.

Subspace ruptures, however, are

accompanied by the release of extreme amounts of gravitomagnetic radiation several orders of magnitude more

powerful than the gravitational fields of whole stars, making their formation extraordinarily

hazardous. This is why starships cannot simply form a powerful Subspace field

around themselves: The gravitomagnetic radiation would maul the starship and utterly

destroy. The radiation, due to its short range (remember that gravitomagnetic

fields have the geometry of magnetic fields but the power of extraordinarily

strong gravitational fields), will disperse in a few kilometres distance and a

few seconds after formation, but it is extremely hazardous within the immediate

vicinity nonetheless.

When created within an atmosphere,

the effects of a Subspace rupture are even more destructive. The atmosphere is

violently blown aside by the extreme release of gravitomagnetic radiation

(which has the property of transferring kinetic

energy rather than electromagnetic energy,

as is typical for electromagnetic radiation), creating compressions of

atmosphere with wind speeds of thousands of kilometres per hour. There is also

an extremely large amount of heat released, creating an explosion resembling

that of a nuclear detonation. The Ihggom'Sann Accords of 1621 (Earth calendar)

abhor the use of Subspace ruptures as weaponry, declaring their nefarious use

to be considered an immediate act of war.