Is there a certain fixed degree of uncertainty? Like for example, we can't reach absolute zero because we would know both the momentum and position of the particle. But if it is say, 3-4 K above absolute zero, there would be a really small degree of uncertainty involved, because its quite localized and its momentum is quite small as well. So, is there a point of "minimum" uncertainty? and would it be useful in experiments? Is my understanding of absolute zero and the uncertainty relation flawed around here?