Quantum Statistics O Bose-Einstein statistics(1924) O Fermi-Dirac statistics (1926 Bose-Einstein condensate Fermi sea E Bose enhancement Pauli Exclusion ho 083N T<7、ho k。(6N)0 superfluid He, dilute gases, le. electrons in metals, atoms excitons neutron starsQuantum Statistics Quantum Statistics 3He, electrons in metals, atoms, neutron stars, … Fermi-Dirac statistics (1926) E F Fermi sea Pauli Exclusion T << T = ( 6 N ) F 1/ 3 k B h ω Bose-Einstein statistics (1924) Bose-Einstein condensate Bose enhancement (0.8 3 N)1/3 T = C k B h ω superfluid 4He, dilute gases, excitons