Bose-Einstein condensation - - PowerPoint PPT Presentation

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bose einstein condensation bec equation of state

Bose-Einstein condensation - - PowerPoint PPT Presentation

Apr 13, 2023 241 likes •311 views

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

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SLIDE 1

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

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SLIDE 2

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

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SLIDE 3

Bose-Einstein condensation BEC heat capacity (fixed N)

U T

Tc

T3/2

T5/2

classical ideal gas classical ideal gas

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SLIDE 4

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

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SLIDE 5

Bose-Einstein condensation BEC superfluid 4He bosonic atoms

BEC superfluid frictionless flow rigidity of condensate

„ - transition “

normal

superfluid

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SLIDE 6

Bose-Einstein condensation BEC ultra-cold atomic gases

87Rb

37 electrons + 87 nucleons = 124 Fermions

Boson

2000 Rb atoms in a trap

Tc = 170 nK

velocity distribution

T > Tc T ~ Tc T < Tc

macroscopic

ccupation of

state with p = 0