Quantum entangled ground states of two spinor Bose-Einstein condensates
- Resource Type
- Working Paper
- Authors
- Xu, Z. F.; Lü, R.; You, L.
- Source
- Phys. Rev. A 84, 063634 (2011)
- Subject
- Condensed Matter - Quantum Gases
- Language
We revisit in detail the non-mean-field ground-state phase diagram for a binary mixture of spin-1 Bose-Einstein condensates including quantum fluctuations. The non-commuting terms in the spin-dependent Hamiltonian under single spatial mode approximation make it difficult to obtain exact eigenstates. Utilizing the spin z-component conservation and the total spin angular momentum conservation, we numerically derive the information of the building blocks and evaluate von Neumann entropy to quantify the ground states. The mean-field phase boundaries are found to remain largely intact, yet the ground states show fragmented and entangled behaviors within large parameter spaces of interspecies spin-exchange and singlet-pairing interactions.
Comment: 7 pages, 5 figures