Negative mass achieved...

I had a cavity, it sucks man.

photon identity is a social construct

Negative mass AND cheap lasers?
What a time to be alive

So is this just a virtual particle (only works in a lab) or could it be produced in significant quantities?
Im guessing the former.

>virtual particle (only works in a lab)
That's not what a virtual particle is

this isn't another "ftl neutrino" type of story is it?

In after didn't actually happen.

No, it would just be like if two objects pushed at each other with equal force. Eventually one will just either break or slip past the other.

The authors don't even hint that that's the possibility but yes it certainly could be used for the FTL design.

OP here, this is how it works

Conservation of momentum
[math] m_{1}v_{1} = -m_{2}v_{2}[/math]

So if you think about it a positive mass object interacting with a negative mass object you have a negative [math]m_{2}[/math] so both sides of the equation will be positive. What this means is that if you have two objects of the same mass then you get this:
[math] mv_{1} = mv_{2}[/math] dividing both sides by m you get [math] v_{1}=v_{2} [/math] so both objects will leave in the same direction.

An example is you have two bowling balls, one of negative, and one of positive mass. The negative mass is at rest and the positive has a velocity of 1m/s striking the negative mass ball. because [math] v_{1}=v_{2} [/math] both balls leave in the same direction with 0.5 m/s velocity.