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Quantum phase transition in a multi-component Bose-Einstein condensate in optical lattices by Chen, Guang-Hong; Wu, Yong-Shi is a scholarly article available to read on EtoBox.

What is Quantum phase transition in a multi-component Bose-Einstein condensate in optical lattices about?

We present the general lattice model for a multi-component atomic Bose-Einstein system in the optical lattice. Using the model, we analytically study the quantum phase transition between Mott insulator and superfluid. A mean-field theory is developed from the Mott insulator ground state. When the inter-species interactions are strong enough, the Mott insulator demonstrates the phase separation behavior. For weak inter-species interactions, the multi species system is miscible. Finally, the phase diagram is discussed with the emphasis on the role of inter-species interactions. The tips of the Mott insulator lobes do not depend on the inter-species interactions, but they indeed modify the range of lobes.

Author

Chen, Guang-Hong; Wu, Yong-Shi

Published

2002

Language

EN