If we increase the temperature of a body so much that its wavelength becomes less than the Planck length, the quantum nature could break down as the wavelength of the particle is lesser than the so-called least possible length.
So my question is:
How will the particle behave when it will go through such a transition?
Does it mean that the existence of such a particle beyond this temperature collapses?
Or it enters into a whole new state of matter where the particles behave entirely different, like BEC?