| Issue |
Europhys. Lett.
Volume 52, Number 3, November I 2000
|
|
|---|---|---|
| Page(s) | 251 - 256 | |
| Section | General | |
| DOI | https://doi.org/10.1209/epl/i2000-00431-5 | |
| Published online | 01 September 2002 | |
Bose-Einstein condensation in inhomogeneous Josephson arrays
1
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
Received:
7
June
2000
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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