Why does nothing exist below "absolute zero"?
Why does nothing exist below "absolute zero"?
In contrast to the heat of the stars shining in the night sky, there is a "lower limit to temperature" in the universe. That is absolute zero (approximately -273.15°C). We will explain the definitive reason why it cannot get any colder, as well as the exceptional phenomena that modern physics has uncovered.
1. The true nature of temperature is "particle vibration"
The true nature of what we perceive as "cold" or "warm" is the "thermal motion" of the atoms and molecules that make up matter.
* High temperature: A state where particles are colliding violently and flying around.
* Low temperature: A state where particle movement becomes gentle and calm.
As you lower the temperature, the movement of these particles slows down more and more. Finally, it reaches a limit where it "cannot get any quieter." This limit point is the zero point of absolute temperature (0 K).
> Trivia: Even at absolute zero, a slight vibration called "zero-point energy" remains due to quantum mechanics. It is physically forbidden to come to a complete "standstill."
2. The paradoxical world of "negative temperature"
While the basic rule of physics is that "there is nothing below absolute zero," the concept of "negative temperature" (negative Kelvin) exists in cutting-edge research.
This does not refer to coldness like "-280°C." It refers to a strange state where, under very specific conditions, adding too much energy results in "passing through an infinitely hot state and, conversely, becoming ordered."
In fact, matter in this "negative temperature" state has higher energy than any matter at a positive temperature. In other words, rather than being cold, it is in an extremely "hot" state.
Conclusion: Absolute zero is the "terminal point of coldness"
As far as we know, absolute zero, where the thermal motion of matter is at its minimum, is the dead end of coldness in the universe. By exploring this extreme world, scientists are trying to discover next-generation technologies such as superconductivity and quantum computers.
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