Europhys. Lett.
Volume 61, Number 2, January 2003
Page(s) 148 - 154
Section General
Published online 01 January 2003
DOI: 10.1209/epl/i2003-00200-6
Europhys. Lett., 61 (2) , pp. 148-154 (2003)

Stern-Gerlach entanglement in spinor Bose-Einstein condensates

S. Cruz-Barrios1, M. C. Nemes2 and A. F. R. de Toledo Piza2

1  Departamento de Física Atómica, Molecular y Nuclear Aptdo 1065, 41080 Sevilla, Spain and Departamento de Física Aplicada I, Universidad de Sevilla - Sevilla, Spain
2  Departamento de Física-Matemática, Institutos de Física, Universidade de São Paulo C.P. 66318, 05315-970 São Paulo, S.P., Brazil

(Received 8 July 2002; accepted in final form 31 October 2002)

Entanglement of spin and position variables produced by spatially inhomogeneous magnetic fields of Stern-Gerlach type acting on spinor Bose-Einstein condensates may lead to interference effects at the level of one-boson densities. A model is worked out for these effects which is amenable to analytical calculation for Gaussian-shaped condensates. The resulting interference effects are sensitive to the spin polarization properties of the condensate.

03.75.Fi - Phase coherent atomic ensembles; quantum condensation phenomena.

© EDP Sciences 2003