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Bose-Einstein condensation in low dimensional layered structures

P. Salas, Solis

Bulletin of the American Physical SocietyMar 12, 20080 citations

Variational calculations on multilayer stacks of dipolar Bose-Einstein condensates

Andrej Junginger, Jörg Main, Günter Wunner

We investigate a multilayer stack of dipolar Bose-Einstein condensates in terms of a simple Gaussian variational ansatz and demonstrate that this arrangement is characterized by the existence of several stationary states. Using a Hamiltonian picture we show that in an excited stack there is a coupled motion of the individual condensates by which they exchange energy. We find that for high excitations the interaction between the single condensates can induce the collapse of one of them. We furthermore demonstrate that one collapse in the stack can force other collapses, too. We discuss the possibility of experimentally observing the coupled motion and the relevance of the variational results found to full numerical investigations.We investigate a multilayer stack of dipolar Bose-Einstein condensates in terms of a simple Gaussian variational ansatz and demonstrate that this arrangement is characterized by the existence of several stationary states. Using a Hamiltonian picture we show that in an excited stack there is a coupled motion of the individual condensates by which they exchange energy. We find that for high excitations the interaction between the single condensates can induce the collapse of one of them. We furthermore demonstrate that one collapse in the stack can force other collapses, too. We discuss the possibility of experimentally observing the coupled motion and the relevance of the variational results found to full numerical investigations.

arXiv:1006.4798Physical Review AAug 4, 20109 citations

Bose-Einstein Condensation in Two-Dimensional Systems

Y. Imry, David J. Bergman, Leon Gunther

Springer eBooksJan 1, 19742 citations

Generation of Quantized Vortices in Multilayered Bose-Einstein Condensates

Qiang Zhao

International Journal of Theoretical PhysicsJan 1, 20220 citations

Multilayer atom chips for versatile atom micromanipulation

M. Trinker, S. Groth, Stefan Haslinger +6 more

We employ a combination of optical and electron-beam lithography to create an atom chip combining submicron wire structures with larger conventional wires on a single substrate. The multilayer fabrication enables crossed wire configurations, greatly enhancing the flexibility in designing potentials for ultracold quantum gases and Bose–Einstein condensates. Large current densities of >6×107A∕cm2 and high voltages of up to 65V across 0.3μm gaps are supported by even the smallest wire structures. We experimentally demonstrate the flexibility of the next generation atom chip by producing Bose–Einstein condensates in magnetic traps created by a combination of wires involving all different fabrication methods and structure sizes.We employ a combination of optical and electron-beam lithography to create an atom chip combining submicron wire structures with larger conventional wires on a single substrate. The multilayer fabrication enables crossed wire configurations, greatly enhancing the flexibility in designing potentials for ultracold quantum gases and Bose–Einstein condensates. Large current densities of >6×107A∕cm2 and high voltages of up to 65V across 0.3μm gaps are supported by even the smallest wire structures. We experimentally demonstrate the flexibility of the next generation atom chip by producing Bose–Einstein condensates in magnetic traps created by a combination of wires involving all different fabrication methods and structure sizes.

arXiv:0801.3351Applied Physics LettersJun 23, 200850 citations

Bose–Einstein Condensation in Layered Systems Under Repulsive Interaction

I. Ţifrea, I. Grosu

Journal of SuperconductivityOct 1, 20011 citation

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