# Why doesn't Helium freeze at 0K?

I have read that Helium does not freeze at absolute zero under normal pressures.

How could this be possible given that the absolute zero is the lowest attainable temperature and at that temperature, all random movements of the atom stop?

Shouldn't the atoms just stop vibrating and solidify instantly? Why do they possess kinetic energy at absolute zero?

• Actually nothing ever gets to 0K, so in a sense 0K is the lowest unattainable temperature, not attainable. Try reading something about superfluidity. – QuantumBrick Aug 17 '16 at 17:28
• But how can anything exist in liquid state at 0K? The atoms just don't contain any kinetic energy! – AmeyaS Aug 17 '16 at 17:32
• The zero-point energy of helium is too high to allow freezing – hebetudinous Aug 17 '16 at 17:32
• – QuantumBrick Aug 17 '16 at 17:35
• Why do they possess kinetic energy at absolute zero? They must keep moving, otherwise we would know what this article says we are not able to....en.wikipedia.org/wiki/Uncertainty_principle – user108787 Aug 17 '16 at 17:47

At $$0K$$ there is still zero point energy. As He is very light and inert the associated zero point motion this is enough to prevent solidification.