https://doi.org/10.1140/epjd/e2015-50814-4
Regular Article
Quantum tunneling and entanglement of dipolar spin-1 bosons in double well potentials
1 School of Science, Zhejiang
University of Science and Technology, Hangzhou, Zhejiang, 310023, P.R. China
2 Department of Physics and Center of
Theoretical and Computational Physics, The University of Hong Kong,
Hong Kong, P.R.
China
3 Department of Physics, Changchun
University of Science and Technology, Changchun
130022, P.R.
China
4 Department of Physics, Hangzhou
Normal University, Hangzhou
310036, P.R.
China
5 Zhejiang Institute of Modern Physics,
Department of Physics, Zhejiang University, Hangzhou
310027, P.R.
China
a e-mail: hyx1226@126.com
Received:
12
November
2014
Received in final form:
29
May
2015
Published online:
23
July
2015
We study spinor Bose-Einstein condensates with dipolar interaction in double well potentials. We consider the two-site Bose Hubbard model and find single atom tunneling occurs for the small tunneling strength. We also investigate the entanglement between the two wells and show that the entanglement is due to both number and spin degrees of freedom. The number entanglement is insensitive to the dipolar interaction, while the spin entanglement is suppressed by dipolar interaction. In addition, we show that the single atom tunneling behavior can be manipulated by adiabatically varying the energy offset between the two wells.
Key words: Quantum Information
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag 2015