Below link You showed me it is about Quantum Computer

I'm sorry I'm not a partner to speak with You about all problems

I want to ask You about words that I already found in link

Dynamic nuclear polarisation via conduction electrons has, however, not yet been demonstrated at room temperature which is crucial for the method to be useful in practice for the development of quantum computers. The main problem is that the spin orientation in the electrons can easily be lost at room temperature, since it is sensitive to disruptions from its surroundings.

Temperature ? can You explain me temperature problem ?
Why the can in lover temperature and have problem with high temp?