Entangled superfluids: Condensate dynamics of the entangled Bose-Einstein condensation

Journal Article · Thu Jul 15 04:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.013637· OSTI ID:21442986

Yu, Shi ^[1]

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1. Department of Physics, Fudan University, Shanghai 200433 (China)

We study the condensate dynamics of the so-called entangled Bose-Einstein condensation (EBEC), which is the ground state of a mixture of two species of pseudospin-(1/2) atoms with interspecies spin-exchange scattering in certain parameter regimes. EBEC leads to four interdependent superfluid components, each corresponding to the orbital wave function associated with a spin component of a species. The four superflows have various counter-relations, and altogether lead to a conserved total supercurrent and a conserved total spin supercurrent. In the homogeneous case, we also obtain the elementary excitations due to variations of the single-particle orbital wave functions, by exactly solving the generalized time-dependent Bogoliubov equations. There are three gapless Bogoliubov modes and one Klein-Gordon-like gapped mode. The origin of these excitations are also discussed from the perspective of spontaneous breaking of the symmetries possessed by the system.

• OSTI ID: 21442986
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 1 Vol. 82; 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
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANGULAR MOMENTUM
ATOMS
BOSE-EINSTEIN CONDENSATION
DIFFERENTIAL EQUATIONS
DISPERSIONS
ENERGY-LEVEL TRANSITIONS
EQUATIONS
EXCITATION
FIELD EQUATIONS
FUNCTIONS
KLEIN-GORDON EQUATION
MIXTURES
PARTIAL DIFFERENTIAL EQUATIONS
PARTICLE PROPERTIES
QUANTUM ENTANGLEMENT
SCATTERING
SPIN
SPIN EXCHANGE
SUPERFLUIDITY
SYMMETRY
TIME DEPENDENCE
VARIATIONS
WAVE EQUATIONS
WAVE FUNCTIONS