The Spacetime Metric
Lecture 440 min 50 sec

The Alcubierre warp metric

A geometry that moves without locally outrunning light.

Read the idea behind the warp bubble, then separate a valid mathematical solution from the unresolved matter and energy needed to realize it.

Season 1 · remastered lesson

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40 min 50 sec · Captions: English · Español · Português · Français · Polski

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Visual explanation

Explore the central idea

Motion is optional · static explanation always available

A craft at rest inside a bubble with space contracted ahead and expanded behind.
The craft remains locally at rest while the surrounding geometry contracts ahead and expands behind. The geometry is established mathematics; the required stress-energy is the open problem.

Read alongside

The Metric Tensor, Warp Drives, and Wormholes

The experiments, equations, and original papers behind the lesson.

Open the companion chapter →