When many quantum particles interact, complex systems can be formed. And this complexity allows reaching a temperature of absolute zero – at least in principle.
Erasing data perfectly and reaching the lowest possible temperature — those two things seem to be completely different, but they are closely intertwined. The absolute lowest temperature possible is -273.15 degrees Celsius. It is never possible to cool any object exactly to this temperature — one can only approach absolute zero. This is the third law of thermodynamics.
A research team at TU Wien (Vienna) has now investigated the question: How can this law be reconciled with the rules of quantum physics? They succeeded in developing a “quantum version” of the third law of thermodynamics: Theoretically, absolute ze...
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