Volume 52, Number 3, November I 2000
|Page(s)||251 - 256|
|Published online||01 September 2002|
Bose-Einstein condensation in inhomogeneous Josephson arrays
INFM and Dipartimento di Fisica,
Università di Parma - Parma, Italy
2 INFM and Dipartimento di Fisica, Politecnico di Torino - Torino, Italy
3 INFM and Dipartimento di Fisica, Università di Perugia - Perugia, Italy
Accepted: 5 September 2000
We show that spatial Bose-Einstein condensation of non-interacting bosons occurs in dimension d < 2 over discrete structures with inhomogeneous topology and with no need of external confining potentials. Josephson junction arrays provide a physical realization of this mechanism. The topological origin of the phenomenon may open the way to the engineering of quantum devices based on Bose-Einstein condensation. The comb array, which embodies all the relevant features of this effect, is studied in detail.
PACS: 03.75.Fi – Phase coherent atomic ensembles; quantum condensation phenomena / 85.25.Cp – Josephson devices / 74.80.-g – Spatially inhomogeneous structures
© EDP Sciences, 2000
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