Dimensional crossover of a boson gas in multilayers
Por:
Salas, P, Sevilla, FJ, Fortes, M, de Llano, M, Camacho, A, Solis, MA
Publicada:
30 sep 2010
Categoría:
Atomic and Molecular Physics, and Optics
Resumen:
We obtain the thermodynamic properties for a noninteracting Bose gas constrained on multilayers modeled by a periodic Kronig-Penney delta potential in one direction and allowed to be free in the other two directions. We report Bose-Einstein condensation (BEC) critical temperatures, chemical potential, internal energy, specific heat, and entropy for different values of a dimensionless impenetrability P >= 0 between layers. The BEC critical temperature T(c) coincides with the ideal gas BEC critical temperature T(0) when P = 0 and rapidly goes to zero as P increases to infinity for any finite interlayer separation. The specific heat C(V) as a function of absolute temperature T for finite P and plane separation a exhibits one minimum and one or two maxima in addition to the BEC, for temperatures larger than that of BEC T(c). This highlights the effects due to particle confinement. We then discuss a distinctive dimensional crossover of the system through the specific heat behavior driven by
Filiaciones:
Salas, P:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, Mexico
Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, Mexico
Sevilla, FJ:
Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, Mexico
Fortes, M:
Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, Mexico
de Llano, M:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City 04510, DF, Mexico
Camacho, A:
Univ Nacl Autonoma Mexico, Fac Ingn, Mexico City 04510, DF, Mexico
Solis, MA:
Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, Mexico
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