3 ms·

Being able to move space around a ship, and being able to move space around a ship faster than the speed of light seem to require orders of magnitude different

Being able to move space around a ship, and being able to move space around a ship faster than the speed of light seem to require orders of magnitude different energies. being in a 'warp bubble' doesn't mean that bubble is traveling at super luminal speeds.

JumpCrisscross 2y ago
> being able to move space around a ship faster than the speed of light seem to require orders of magnitude different energies They require different kinds of energies. Specifically, the latter requires negative energy, something we have no evidence exists. > being in a 'warp bubble' doesn't mean that bubble is traveling at super luminal speeds Nobody claimed as much. The physically-possible warp bubble lets you slow down time. So a 100,000-year journey would feel, to the ship’s occupants (and its structure and computers, et cetera), like possibly months. (You also get the capability to transport people and things forward in time without degradation. Or, I believe, to speed up time inside e.g. a production or computational environment.)
- altruios 2y ago
  > The physically-possible warp bubble lets you slow down time. that... seems odd to me. without substantial changes in velocity - how does a warp bubble (that's sub-luminal - so relativistic velocities) alter the fabric of space-time so fantastically? It's not moving fast: so where does the time dilation come from?!
  - JumpCrisscross 2y ago
    > not moving fast: so where does the time dilation come from?! I think it’s from shifting momentum?? The paper is far beyond me [1]. But as I understood it, you’re directly modifying space-time with energy instead of using acceleration as a go-between. [1] https://arxiv.org/html/2405.02709v1 https://arxiv.org/html/2405.02709v1
  - ben_w 2y ago
    The mass distribution in the metric can do that; IIRC this was chosen in order to not have time dilation, so I think someone's getting confused (and maybe that someone is me?)

JumpCrisscross 2y ago

> being able to move space around a ship faster than the speed of light seem to require orders of magnitude different energies They require different kinds of energies. Specifically, the latter requires negative energy, something we have no evidence exists. > being in a 'warp bubble' doesn't mean that bubble is traveling at super luminal speeds Nobody claimed as much. The physically-possible warp bubble lets you slow down time. So a 100,000-year journey would feel, to the ship’s occupants (and its structure and computers, et cetera), like possibly months. (You also get the capability to transport people and things forward in time without degradation. Or, I believe, to speed up time inside e.g. a production or computational environment.)

altruios 2y ago
> The physically-possible warp bubble lets you slow down time. that... seems odd to me. without substantial changes in velocity - how does a warp bubble (that's sub-luminal - so relativistic velocities) alter the fabric of space-time so fantastically? It's not moving fast: so where does the time dilation come from?!
- JumpCrisscross 2y ago
  > not moving fast: so where does the time dilation come from?! I think it’s from shifting momentum?? The paper is far beyond me [1]. But as I understood it, you’re directly modifying space-time with energy instead of using acceleration as a go-between. [1] https://arxiv.org/html/2405.02709v1 https://arxiv.org/html/2405.02709v1
- ben_w 2y ago
  The mass distribution in the metric can do that; IIRC this was chosen in order to not have time dilation, so I think someone's getting confused (and maybe that someone is me?)