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Abstract:

Nonequilibrium dynamics of a Bose-Einstein condensate (BEC) dynamics with fluctuations was analyzed using nonequilibrium many-body approaches beyond the Hartree-Fock-Bogoliubov (HFB) approximation. Nonequilbrium dynamics of BEC was loaded in an optical lattice was described by the closed-time-path (CTP) functional formalism for two-particle irreducible (2PI) Green's function. It was observed that second-order 2PI approximations were able to capture the damping effects due to the multiplarticle scattering in a systematic way. It was also observed that second-order 2PI approximation worked at intermediate times when correlations were not negligible and standard mean-field techniques.

Registro:

Documento: Artículo
Título:BEC Dynamics with Fluctuations: Beyond HFB Approximation
Autor:Rey, A.M.; Hu, B.L.; Calzetta, E.; Roura, A.; Clark, C.
Filiación:Inst. for Phys. Sci. and Technology, University of Maryland, College Park, MD 20742, United States
U.S. Department of Commerce, Technology Administration, Natl. Inst. of Std. and Technology, Gaithersburg, MD 20899-8410, United States
Departamento de Fisica, Fac. de Ciencias Exactas y Naturales, Ciudad Universitaria, Buenos Aires, 1428, Argentina
Palabras clave:Approximation theory; Condensation; Convergence of numerical methods; Correlation methods; Green's function; Hamiltonians; Kinetic energy; Oscillations; Perturbation techniques; Superlattices; Multiparticle scattering; Optical lattices; Quantum theory
Año:2004
Volumen:14
Número:2
Página de inicio:318
Página de fin:330
Título revista:Laser Physics
Título revista abreviado:Laser Phys.
ISSN:1054660X
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1054660X_v14_n2_p318_Rey

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Citas:

---------- APA ----------
Rey, A.M., Hu, B.L., Calzetta, E., Roura, A. & Clark, C. (2004) . BEC Dynamics with Fluctuations: Beyond HFB Approximation. Laser Physics, 14(2), 318-330.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1054660X_v14_n2_p318_Rey [ ]
---------- CHICAGO ----------
Rey, A.M., Hu, B.L., Calzetta, E., Roura, A., Clark, C. "BEC Dynamics with Fluctuations: Beyond HFB Approximation" . Laser Physics 14, no. 2 (2004) : 318-330.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1054660X_v14_n2_p318_Rey [ ]
---------- MLA ----------
Rey, A.M., Hu, B.L., Calzetta, E., Roura, A., Clark, C. "BEC Dynamics with Fluctuations: Beyond HFB Approximation" . Laser Physics, vol. 14, no. 2, 2004, pp. 318-330.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1054660X_v14_n2_p318_Rey [ ]
---------- VANCOUVER ----------
Rey, A.M., Hu, B.L., Calzetta, E., Roura, A., Clark, C. BEC Dynamics with Fluctuations: Beyond HFB Approximation. Laser Phys. 2004;14(2):318-330.
Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1054660X_v14_n2_p318_Rey [ ]