In other threads topics were discussed about concepts of frame dragging and stability of de Sitter space.
In the present question a topic is being explored about eventual high speed travel in deep space, and whether or not it might destabilize space time in an extreme case of high energy.
Other researchers have published methods of calculating sizes of Anti de Sitter bubbles that would shrink and disappear, compared to larger sizes that were predicted to expand and propagate.
In other threads discussion centered on possibility of spontaneous wormholes opening when kinetic energy reaches a critical value, suggesting that the Anti de Sitter bubble might not form or reach critical size.
The question is asking for opinions about stability of space time at extreme high energy.
How Close To Light Speed Can A Large Vehicle Go Without Propagating Anti de Sitter Bubble In A Dragged Frame?
According to Yangton and Yington Theory, photon is a free Wu's Pair escaped from light source (parent object). Also, light speed in vacuum (no any particle) can change as follows:
1. Space and Time don’t change. However the dimension and duration of an object or event can change with local gravitational field and aging of the universe of the object or event. Also subject to the unit quantities used for the measurements, which are dependent on the local gravitational field and aging of the universe of the reference point, the amounts of unit quantities can vary with measurements.
2. Light speed observed at the reference point C' is the vector summation of light speed observed at light source C (Absolute Light Speed which is a constant 3 x 108 m/s on earth) and the speed of light source (Inertia Light Speed) observed at the reference point V. This is called Equation of Light Speed.
C’ = C + V
3. Because of the various speeds of light source (Inertia Light Speed V), Acceleration Doppler Effect and Even Horizon can be observed. In other words, object can travel in space with a speed faster than light speed.
4. The Absolute Light Speed is constant (except depending on the local gravitational field and aging of the universe) no matter of light frequency and light source. Because Wu's Pairs (a Yangton and Yington circulation pairs) are the building blocks of the universe, also Wu's Unit Length (diameter of Wu's Pair) and Wu's Unit Time (period of circulation) are dependent on the local gravitational field (and aging of the universe). Both Wu's Unit Length and Wu's Unit Time are bigger as local gravitational field is bigger such as that on a massive star. In other words, under equilibrium conditions, for corresponding identical object or event (with constant amounts of units), their dimension and duration become bigger, while their speed and acceleration get smaller. As a result Absolute Light Speed also gets smaller on a massive star.
5. Absolute Light Speed doesn't change with velocity and acceleration (except gravitational acceleration caused by gravitational field).
6. Light speed observed at the reference point is also subject to the unit length (or Wu's Unit Length) and unit time (or Wu's Unit Time) used for measurement which are dependent on the local gravitational field at the reference point. For example, because Wu's Unit Length (lyy) and Wu's Unit Time (tyy) are bigger at a massive star with large gravitational field. Under equilibrium conditions, for a corresponding identical object or event (constant amounts of unit quantities), their total length and duration are bigger and their speed and acceleration are smaller, because Wu's Unit Length and Wu's Unit Time are bigger at the massive star. In addition, as it is observed on earth, because the unit length (or Wu's Unit Length) and unit time (or Wu's Unit Time) on earth are smaller, therefore the amounts of unit length and unit time measured are bigger, also the velocity and acceleration are measured smaller on earth than that measured on the star. As a result, Absolute Light Speed on the massive star is also measured smaller on earth.
7. Yangton and Yington Theory agrees very well with General Relativity that Dimension, Duration, Speed and Acceleration of an object or event are dependent on the local gravitational field (and aging of the universe – Einstein missed this part in his theory), except the relativistic factor 1/(1-V2/C2)1/2 which has no actual meaning in Yangton and YIngton Theory. Because in Wu’s Spacetime Shrinkage Theory, there is no fixed formula between Wu’s Unit Length (and Wu’s Unit Time tyy = γlyy 3/2) and gravitational field (or aging of the universe).
The comment is interesting. This question is asking for opinions of energy densities so high that General Relativity is not accurate.
The main assertion is that kinetic energy travels as a local field in and around an object in agreement with Quantum Field Theory. Then the object exchanges quanta of energy with the field as it accelerates. Without such a field there is nothing to resist the change of path or enforce light speed as a limit.
Everything physical tested is found to have a limit that prevents infinities from occurring. A limit of energy density in space is expected to be found beyond which a change of quantum state occurs. It is the Squeezed Quantum States, Scale Relativity, and Hierarchy of Plancks.
One key to understanding is the Planck h which is constant in General Relativity. It has units of angular momentum, and can be thought of as the quantized angular momentum of something like zero point energy, or the quantized stress field of kinetic energy.
Extreme energy density may boost the angular momentum to 2h or 3h or more which provides more degrees of freedom in which more energy may be safely contained. This also is thought to reach a limit in which de Sitter universe is in doubt and Anti de Sitter universe becomes possible.
At 4h in this representation spontaneous wormholes open around the object powered by local kinetic energy field, possibly preventing decay of de Sitter universe, unless it has already decayed at a lower speed.
The question is asking opinions about stability of space and time under extreme stress and what precautions may be taken in next generation deep space travel.
A speed is a relative quantity - you can achieve as near lightspeed c as you want easily by chosing coordinates.
Interesting reply. A coordinate system might be chosen to be moving near light speed with respect to the destination. Then the traveler could claim near light speed with respect to the chosen coordinate system, making a contradiction.
A more reasonable choice of coordinate system speeds would be the isotropic CMB representing space that a starship ship would be interacting with.
Already with dragged frame and Anti de Sitter bubble the question is reaching beyond GR in extreme high energy densities.
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