A few days ago, I stumbled upon an article about how Alcubierre warp drive would need negative mass to create and manipulate the warp bubble. It makes them go faster than light. I searched about what is negative mass. Here is what I have found about it.
The universe is full of diverse and fascinating forms of matter, some of which are familiar to us, such as atoms, molecules, and stars, and some of which are mysterious and exotic, such as dark matter, antimatter, and quark-gluon plasma. One of the most intriguing and counterintuitive types of exotic matter is negative mass, which is a hypothetical form of matter that has the opposite sign of the mass of normal matter.
For example, if a normal object has a mass of 5 kg, a negative-mass object would have a mass of -5 kg. This means that negative mass would behave very differently from normal matter in terms of inertia, gravity, and energy.
Negative mass has not been observed in nature, but some physicists have proposed ways to create it in the laboratory or to simulate its effects using other forms of matter. Using a simple analogy is one way to understand how negative mass would work.
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