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MathematicalPhysicist
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In the book A Quantum Approach to Condensed Matter Physics by Taylor and Heinonen they write the following passage on page 87:
Now I don't understand what does it mean "macroscopic number", how many particles?
Thus there is a temperature ##T_c##, defined by ##N_0(T_c)=N##, below which the zero-energy state is occupied by a macroscopic number of particles. This phenomenon is known as the Bose-Einstein condensation, and is remarkable in being a phase transition that occurs in the absence of inter-particle forces.
Now I don't understand what does it mean "macroscopic number", how many particles?