Bose-Einstein condensation in inhomogeneous Josephson arrays

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 o...

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Veröffentlicht in:	Europhysics letters 2000-11, Vol.52 (3), p.251-256
Hauptverfasser:	Burioni, R, Cassi, D, Meccoli, I, Rasetti, M, Regina, S, Sodano, P, Vezzani, A
Format:	Artikel
Sprache:	eng
Schlagworte:	03.75.Fi 74.80.-g 85.25.Cp Classical and quantum physics: mechanics and fields Condensed matter: structure, mechanical and thermal properties Exact sciences and technology Matter waves Phase coherent atomic ensembles quantum condensation phenomena Physics Quantum effects on the structure and dynamics of nondegenerate fluids (e.g., normal phase liquid 4he) Quantum fluids and solids liquid and solid helium
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Beschreibung
Zusammenfassung:	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.
ISSN:	0295-5075 1286-4854
DOI:	10.1209/epl/i2000-00431-5