Question

What is the bose-einstein condensate?

Answer 1

Bose-Einstein condensate is a state of matter that arises because of quantum mechanical effects on a collection of entities called bosons These boson form condensate when cooled to temperatures very near to absolute zero. Helium–4 forms this condensate. At absolute zero temperature, it becomes a superfluid. 

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Answer 2

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A Bose-Einstein condensate (BEC), the first of which was shown experimentally 22 years ago, isn't your garden variety state of matter. It formed at a fraction above absolute zero and only in atoms that act like bosons, one of two types of fundamental particles.

Bose-Einstein condensate (BEC), a state of matter in which separate atoms or subatomic particles, cooled to near absolute zero (0 K, − 273.15 °C, or − 459.67 °F; K = kelvin), coalesce into a single quantum mechanical entity—that is, one that can be described by a wave function—on a near-macroscopic scale.