Internal Josephson effects in spinor dipolar Bose-Einstein condensates

Journal Article · Mon Feb 15 00:00:00 EST 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.81.023624· OSTI ID:21408296

Yasunaga, Masashi; Tsubota, Makoto ^[1]

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1. Department of Physics, Osaka City University, Sumiyoshi-ku, Osaka 558-8585 (Japan)

We theoretically study the internal Josephson effect, which is driven by spin-exchange interactions and magnetic dipole-dipole interactions, in a three-level system for spin-1 Bose-Einstein condensates, obtaining novel spin dynamics. We introduce single spatial mode approximations into the Gross-Pitaevskii equations and derive the Josephson-type equations, which are analogous to tunneling currents through three junctions between three superconductors. From an analogy with two interacting nonrigid pendulums, we identify unique varied oscillational modes, called the 0-{pi}, 0-running, running-running, 2n{pi} and running-2{pi}, single nonrigid pendulum, and two rigid pendulums phase modes. These Josephson modes in the three states are expected to be found in real atomic Bose gas systems.

• OSTI ID: 21408296
• Journal Information: Physical Review. A, Vol. 81, Issue 2; Other Information: DOI: 10.1103/PhysRevA.81.023624; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
APPROXIMATIONS
BOSE-EINSTEIN CONDENSATION
BOSE-EINSTEIN GAS
CURRENTS
EQUATIONS
INTERACTIONS
JOSEPHSON EFFECT
MAGNETIC DIPOLES
SPIN
SPIN EXCHANGE
SUPERCONDUCTORS
TUNNEL EFFECT
ANGULAR MOMENTUM
CALCULATION METHODS
DIPOLES
MULTIPOLES
PARTICLE PROPERTIES