Comment on U.S. Govt and researchers seemingly discover new type of superconductivity in an exotic, crystal-like material — controllable variation breaks temperature records

• CheezyWeezle@lemmy.world ⁨9⁩ ⁨months⁩ ago

  Maybe you should go read the article and actually read my comment. The article literally agrees with everything I said within the first few paragraphs. Negative temperatures do not and cannot exist under the classical definition, but the overall state of a system can reach a configuration that behaves like a negative temperature would, yet this is achieved by raising the temperature above what would tend towards infinity. Once again, it can be useful to represent certain configurations of systems of matter as a negative temperature with added context, and that’s why negative temperatures are a thing in science. It’s also why there are things like the summation of all natural numbers (1+2+3+4+…) being equal to -1/12. If you actually add up the natural numbers you get infinity, but ignoring that can yield useful results.

  You are also absolutely wrong about temperature being dependent on all energy. Temperature is literally defined as the measurement of kinetic energy in a system. Are you actually suggesting that if I put an apple on an elevator, it’s temperature is going to be increased when I send it up? Or that if I inject that apple with cold diesel fuel it will heat up? Those things would increase the energy of the apple, but not increase the kinetic energy and therefore the temperature does not rise.

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  • GiveMemes@jlai.lu ⁨9⁩ ⁨months⁩ ago

    From the article (which you clearly either didn’t read or didn’t understand):

    “Temperature, however, relates not only to kinetic energy, but to the total energy of the particles, which in this case includes interaction and potential energy.”

     “The inverted Boltzmann distribution is the hallmark of negative absolute temperature; and this is what we have achieved,” says Ulrich Schneider. “Yet the gas is not colder than zero kelvin, but hotter,” as the physicist explains: “It is even hotter than at any positive temperature – the temperature scale simply does not end at infinity, but jumps to negative values instead.”

    “At first sight it may sound strange that a negative absolute temperature is hotter than a positive one. This is simply a consequence of the historic definition of absolute temperature, however; if it were defined differently, this apparent contradiction would not exist.”

    “Temperature, however, relates not only to kinetic energy, but to the total energy of the particles, which in this case includes interaction and potential energy. The system of the Munich and Garching researchers also sets a limit to both of these. The physicists then take the atoms to this upper boundary of the total energy – thus realising a negative temperature, at minus a few billionths of a kelvin.”

    Again, very sure of yourself for being so incredibly incorrect…

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    • CheezyWeezle@lemmy.world ⁨9⁩ ⁨months⁩ ago

      Lmao you are the one who is actually tangibly misunderstanding the article. It clearly states that temperature RELATES to all forms of energy, which is true, but temperature is not directly affected by potential energy. Potential energy can, for example, raise the boiling point of a substance, but it does not actually change the temperature directly.

      Since you clearly need a refresher on the fundamentals of heat and temperature:

      www.houstonisd.org/cms/lib2/…/Thermal Energy.pdf

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