Fluid-dynamical scheme for equilibrium properties of two trapped fermion species with pairing interactions

We present a generalization of the fluid-dynamical scheme developed for nuclear physics to the case of two trapped fermion species with pairing interactions. To establish a macroscopic description of the mass and momentum conservation laws, we adopt a generalization of the usual Thomas-Fermi approac...

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Autor principal: Capuzzi, P.
Otros Autores: Hernández, Ester Susana, Szybisz, L.
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: 2008
Acceso en línea:Registro en Scopus
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100 1 |a Capuzzi, P. 
245 1 0 |a Fluid-dynamical scheme for equilibrium properties of two trapped fermion species with pairing interactions 
260 |c 2008 
270 1 0 |m Capuzzi, P.; Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, 1428 Buenos Aires, Argentina 
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506 |2 openaire  |e Política editorial 
520 3 |a We present a generalization of the fluid-dynamical scheme developed for nuclear physics to the case of two trapped fermion species with pairing interactions. To establish a macroscopic description of the mass and momentum conservation laws, we adopt a generalization of the usual Thomas-Fermi approach that includes the pairing energy. We analyze the equilibrium density and gap profiles for an equal population mixture of harmonically trapped Li6 atoms for different choices of the local equation of state. We examine slight departures from equilibrium within our formulation, finding that density oscillations can propagate as first sound coupled to pairing vibrations, that in a homogeneous fermion system exhibit a Bogoliubov-like quasiparticle spectrum. In this case, the dispersion relation for the coupled modes displays a rich scenario of stable, unstable, and damped regimes. © 2008 The American Physical Society.  |l eng 
593 |a Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, 1428 Buenos Aires, Argentina 
593 |a Consejo Nacional de Investigaciones Científicas y Técnicas, 1033 Buenos Aires, Argentina 
593 |a Departamento de Física, Comisión Nacional de Energía Atómica, 1428 Buenos Aires, Argentina 
690 1 0 |a EQUATIONS OF STATE 
690 1 0 |a FLOW INTERACTIONS 
690 1 0 |a NUCLEAR PHYSICS 
690 1 0 |a BOGOLIUBOV 
690 1 0 |a COUPLED MODES 
690 1 0 |a DENSITY OSCILLATIONS 
690 1 0 |a DISPERSION RELATIONS 
690 1 0 |a EQUATION OF STATES 
690 1 0 |a EQUILIBRIUM DENSITIES 
690 1 0 |a EQUILIBRIUM PROPERTIES 
690 1 0 |a FERMION SYSTEMS 
690 1 0 |a GAP PROFILES 
690 1 0 |a LI6 ATOMS 
690 1 0 |a MOMENTUM CONSERVATION LAWS 
690 1 0 |a PAIRING INTERACTIONS 
690 1 0 |a QUASIPARTICLE SPECTRUMS 
690 1 0 |a FERMIONS 
700 1 |a Hernández, Ester Susana 
700 1 |a Szybisz, L. 
773 0 |d 2008  |g v. 78  |k n. 4  |p Phys Rev A  |x 10502947  |t Physical Review A - Atomic, Molecular, and Optical Physics 
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856 4 0 |u https://doi.org/10.1103/PhysRevA.78.043619  |y DOI 
856 4 0 |u https://hdl.handle.net/20.500.12110/paper_10502947_v78_n4_p_Capuzzi  |y Handle 
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