hello, ZeroEm; A history lesson; ) In 1848 Lord Kelvin ( William Thomson is credited with developing the concept and scale for absolute zero; setting it at -273.15 C. ( = 0 Kelvin. ) or -459.67 F. this was calculated by the means where atmosphere becomes flattened having no height. and all movement of matter stops meaning no energy can be produce at that temperature;
( second question; ) Anti matter is a science fiction creation; knowing what matter is in the first place in physics has to relate to something in the form of a matter opposite that would create energy is somewhat not possible;
because Energy is absolutely made from non-anti matter being ( existing matter of weight or mass in movement only -- ( ONLY )
people outside the knowledge of physics; may think energy is something magic; but it is ONLY weight of matter in movement;
E=Mc>2 -- matter in movement makes energy
Saying if Anti-matter comes in contact with matter could make energy; What would that energy be because each in theory
( Cancels the other one OUT ) meaning nothing is left to make energy in the first place

even Mr. Spock would have to say; the logic to that is indeed raising one eyebrow; if one Cancels the other; there is nothing left to make are Star-ship run : on the anti-mater reactor - on that concept; Opps; The science fiction writers missed that day of class;
But the story of such non-sense; is though to be true; in light of the fact; it is ( indeed - impossible ) putting the eyebrow back down; this is why I said; if people pass on the false truth as fact; a fool being born every day; as said be the head of the circus of errors; could it really be possible people would ever believe the world could have ever been ( FLAT )
Indeed; they could; ((( Why do you think I laugh at people so much ))) They are the very fun stuff the earth is made with; confusion or you asked about fusion;
Did you know the fusion reactors are built in the same ways as the nuclear bombs ( and the nuclear materials needed in 30 years will not exist to even start the first one; and the reaction speed is about 1/200 th. of a second travel in 1 mile
knowing engineering valves; to stop a backfire in a few feet from the fuel source to the reaction inside the reactor;
The time ON and OFF Well; you do the math; Boom and big Boom
The scientist working on the fusion reactors will all be dead before the first is ever tested; doesn't that sound a little funny to you.
They will have made a big living on the scam of the idea; and be dead living on the scam money from people funding the projects that don't have the common sense to understand the basic scam going on in their mist.
But if people want to fund a scam like fusion energy; again the fool born every day applies; ( I guess ? )
Din ma - Tom