Bose-Einstein Condensate is

Bose-Einstein Condensate is

solid state of matter
fifth state of matter
plasma
state of condensed matter
This question was previously asked in
UPSC CDS-2 – 2019
Bose-Einstein Condensate (BEC) is considered a fifth state of matter, distinct from the common states of solid, liquid, gas, and plasma. It is formed when a gas of bosons is cooled to temperatures very near absolute zero, causing the particles to condense into the lowest quantum state, behaving as a single quantum mechanical entity.
Bose-Einstein Condensate represents a state of matter exhibiting unique quantum properties at extremely low temperatures.
The concept of BEC was predicted by Satyendra Nath Bose and Albert Einstein in the 1920s and first experimentally created in 1995 by Eric Cornell, Carl Wieman, and Wolfgang Ketterle, who shared the Nobel Prize in Physics in 2001 for this achievement. Plasma is often referred to as the fourth state of matter and exists at very high temperatures.