Journal
PHYSICAL REVIEW A
Volume 83, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.83.023614
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Funding
- National Science Foundation (NSF) of China [10774095, 11074153]
- National Basic Research Program of China (973 Program) [2010CB923103, 2011CB921601]
- NSF of Shanxi Province
- Shanxi Scholarship Council of China
- Program for New Century Excellent Talents in University (NCET)
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We study the ground-state properties of a mixture formed by two spin-1 condensates in the absence of an external magnetic field. As the collisional symmetry between interspecies bosonic atoms is broken, the interspecies coupling interaction (beta) and interspecies singlet-pairing interaction (gamma) arise. The ground state can be calculated using the angular momentum theory analytically for gamma = 0. The full quantum approach of exact diagonalization is adopted numerically to consider the more general case as gamma not equal 0. We illustrate the competition between the two interspecies interactions and find that as singlet-pairing interaction dominates (or the total spin vanishes), there are still different types of singlet formations which are well determined by beta.
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