Bose-Einstein condensation - PowerPoint PPT Presentation

Bose-Einstein condensation BEC equation of state compressibility V > V c diverges at z = 1

Bose-Einstein condensation BEC entropy (fixed ) entropy per particle contribution to entropy from normal particles only

Bose-Einstein condensation BEC heat capacity (fixed N ) U classical ideal gas classical ideal gas T 3/2 T 5/2 T c T

Bose-Einstein condensation BEC phase diagram p-V -diagram p-T -diagram BEC

Bose-Einstein condensation BEC superfluid 4 He bosonic atoms BEC superfluid frictionless flow rigidity of condensate normal superfluid „ - transition “

Bose-Einstein condensation BEC ultra-cold atomic gases Boson 87 Rb 37 electrons + 87 nucleons = 124 Fermions T c = 170 nK 2000 Rb atoms in a trap velocity distribution T ~ T c T < T c T > T c macroscopic occupation of state with p = 0