Two-Fluid Model for Anisotropic Superfluids
Two-Fluid Model for Anisotropic Superfluids
Two-Fluid Model for Anisotropic Superfluids
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Introduction Action Principle Classic Approach Sound Propagation Anisotropy<br />
Sound velocities<br />
sound velocities<br />
[ (∂p )<br />
u1,2‖,⊥ 2 =1 2 ∂ ˜ρ<br />
¯s<br />
[<br />
√ (∂p )<br />
±<br />
√1<br />
4 ∂ ˜ρ<br />
+ ρ ]<br />
s 0‖,⊥ T¯s 0<br />
2<br />
ρ n0‖,⊥ c ν<br />
¯s<br />
+ ρ s 0‖,⊥<br />
ρ n0‖,⊥<br />
T¯s 2 0<br />
c ν<br />
] 2<br />
− ρ s 0‖,⊥<br />
ρ n0‖,⊥<br />
( T¯s<br />
2<br />
0<br />
c ν<br />
) ( ) ∂p<br />
∂ ˜ρ<br />
T<br />
expression remains complicated, because we do not assume, ) that<br />
pressure and temperature fluctuations are uncoupled ≠ 0<br />
(<br />
∂p<br />
∂T<br />
ρ<br />
<strong>Two</strong>-<strong>Fluid</strong> <strong>Model</strong> <strong>for</strong> <strong>Anisotropic</strong> <strong>Superfluids</strong><br />
Carolin Wille