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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/226869
The Two-Fluid Model of Superfluidity
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Liquid 4He presents a continuous phase transition at Tλ ≈ 2.17 K from a normal fluid (He I) to a superfluid (He II). This work explores the theoretical framework explaining He II’s unique behavior. We will focus on Landau’s two-fluid model, which treats He II as a mixture of a superfluid component with zero entropy that remains in the ground state, and a normal fluid component associated to the excitations of Helium. The model successfully explains key experimental phenomena and predicts the existence of second sound, a temperature wave unique to quantum fluids.
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Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Curs: 2026, Tutor: Alberto Fernández-Nieves
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MOLINA RUIZ, Fernando. The Two-Fluid Model of Superfluidity. [consulted: 7 of June of 2026]. Available at: https://hdl.handle.net/2445/226869