2015/12/17 by V. E. Barragán, M. Fortes, M. A. Solís +1 · 2 citations
Physics and Astronomy · #Bose gas #Bose–Einstein condensate #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Materials science #Physics #Quantum, superfluid, helium dynamics #Strong Light-Matter Interactions #cond-mat.quant-gas
paper · pdf · doi:10.1142/s0217979216500995
published in International Journal of Modern Physics B 30(17), 1650099 (World Scientific) · Six pages and 8 eps figures
arxiv created 2015/12/17 · openalex publication_date 2016/05/20 · arxiv updated 2016/07/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Disorder effects in the thermodynamic properties of an ideal Bose gas confined in a semi-infinite multi-layer structure within a box of thickness [Formula: see text] and infinite lateral extent, are analyzed. The layers are first modeled by a periodic array of [Formula: see text] Dirac-delta functions of equal intensity. Then, we introduce structural and compositional disorder, as well as a random set of layer vacancies in the system to calculate the internal energy, chemical potential and the specific heat for different configurations. Whereas structural and compositional disorder do not reveal a significant change, a dramatic increase in the maximum of the specific heat is observed when the system is depleted a fraction of the order of 0.1–0.2 of random layers compared to the original, fully periodic array. Furthermore, this maximum, which is reminiscent of a Bose–Einstein condensation for an infinite array, occurs at higher temperatures.