A question about quantum entanglement

[RRoader]

Please forgive any ignorance in advance, I have a lot of general science knowledge but know little about physics. I'm not sure if two particles with mass can be entangled, but if they can what happens if you entangle two particles while only one is accelerated, do they both gain mass, or only the one that is being accelerated?

 

[Nugatory]

Neither. Particles don't gain mass when they are accelerated. (They do gain kinetic energy, but of you interact with one member of an entangled pair in a way that changes its energy you'll also break the entanglement).

For more on this bit about mass increasing with speed, take a look at this Insights article: https://www.physicsforums.com/insights/what-is-relativistic-mass-and-why-it-is-not-used-much/

 

[DrChinese]

I'm not sure if two particles with mass can be entangled, but if they can what happens if you entangle two particles while only one is accelerated, do they both gain mass, or only the one that is being accelerated?

And in case you didn't pick up from Nugatory's answer: particles with mass (such as electrons, ions, atoms, molecules) can be entangled. However, doing something (such as accelerating) to one does not automatically cause the same thing to happen to the other.