I'm not really a science whiz, but I know lasers generally use photons to increase the kinetic energy of atoms in their path, thus raising the temperature. Now I know electrons have negative energy, but this is only in relation to being less than infinity if I'm not mistaken (https://chemistry.mcmaster.ca/esam/Chapter_3/intro.html#:~:text=When%20a%20stable%20atom%20is,the%20energy%20will%20be%20negative.) So my question is could a laser with negative energy suck the kinetic energy from an atom, thus cooling it and transfer into the gun (in which a tremendous amount of waste heat would be released), thus slowing down the atom and cooling down the energy of its target massively? If not, what laws of physics would this violate and how?
I'm not really a science whiz [...] I know electrons have negative energy, but this is only in relation to being less than infinity
In my chemistry book in high school the concept of energy levels for electrons was explained with this metaphor: imagine having a ladder, where you don't know how high it is above the ground, but you can only measure the distance between the steps.
With the above metaphor, negative energy applies because we have set the 0 at infinity from a nucleus, thus whenever the electron gets closer and loses energy it goes negative. The same is applied to gravitational field, where a 2 body system with positive total energy is unbound, negative total energy is bound.
However this is just a convenient way to deal with the fact that we "don't know" where to put the absolute 0 for energy.
For dark energy/matter, it's called dark because whatever it produces it, it doesn't interact with photons, aka light, of any sort. It follows that a laser of dark energy is a nonsense.
Last but not least, antiparticles annihilates when combining with particles, producing a gamma photon: that goes in the opposite direction of cooling something down, if it wasn't that, as stated in the comments, a photon is its own antiparticle, thus no annihilation at all.