6533b855fe1ef96bd12b14ea

RESEARCH PRODUCT

Second sound near lambda transition in presence of quantum vortices

David JouLidia SalutoMaria Stella Mongiovì

subject

PhysicsCouplingApplied MathematicsGeneral MathematicsAttenuation010102 general mathematicsPhase (waves)Lambda transition01 natural sciences010305 fluids & plasmasVortexSuperfluidityQuantum electrodynamics0103 physical sciencesSecond sound0101 mathematicsQuantumSettore MAT/07 - Fisica MatematicaSecond sound Lambda phase transition Superfluid helium Quantum vortices

description

In this paper, temperature waves (also known as second sound) are consid- ered, with their respective coupling with waves in the order parameter describing the transition from normal phase to superfluid phase, and with waves in the vortex length density. We analyze the coupling between these three kinds of waves and explore its relevance in situations not far from the lambda transition. In particular, the expres- sions for the second sound speed and second sound attenuation are explicitly obtained within some approximations, showing the influence of the order parameter and the vortex length density, which is decisive close to the transition.

yearjournalcountryeditionlanguage
2018-06-09
10.1007/s11587-018-0410-zhttp://hdl.handle.net/10447/357452