Quantum entangled ground states of two spinor Bose-Einstein condensates

Journal Article · Thu Dec 15 04:00:00 EST 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.84.063634· OSTI ID:22095685

Xu, Z. F.; Lue, R.; You, L. ^[1]

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1. State Key Laboratory of Low Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084 (China)

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 noncommuting terms in the spin-dependent Hamiltonian under the single-spatial-mode approximation make it difficult to obtain exact eigenstates. Utilizing spin-z-component conservation and total spin angular momentum conservation, we numerically derive information on the building blocks and evaluate the 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.

• OSTI ID: 22095685
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 6 Vol. 84; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
APPROXIMATIONS
BINARY MIXTURES
BOSE-EINSTEIN CONDENSATION
EIGENSTATES
ENTROPY
FLUCTUATIONS
GROUND STATES
HAMILTONIANS
MEAN-FIELD THEORY
PAIRING INTERACTIONS
PHASE DIAGRAMS
QUANTUM ENTANGLEMENT
SPIN
SPIN EXCHANGE