2010/09/30 by Lih-King Lim, T. Troppenz, Thomas Troppenz +1 · 1 citation
Physics and Astronomy · #Bose–Einstein condensate #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Josephson effect #Momentum (technical analysis) #Optical lattice #Physics #Physics of Superconductivity and Magnetism #Quantum electrodynamics #Quantum mechanics #Strong Light-Matter Interactions #Superconductivity #Superfluidity #Vortex #cond-mat.quant-gas
paper · pdf · doi:10.1103/physreva.84.053609
published as Phys. Rev. A 84, 053609 (2011) · 8 pages, 6 figures
openalex publication_date 2011/11/11 · arxiv created 2011/11/16 · arxiv updated 2013/05/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The internal Josephson oscillations between an atomic Bose-Einstein condensate (BEC) and a molecular one are studied for atoms in a square optical lattice subjected to a staggered gauge field. The system is described by a Bose-Hubbard model with complex and anisotropic hopping parameters that are different for each species, i.e., atoms and molecules. When the flux per plaquette for each species is small, the system oscillates between two conventional zero-momentum condensates. However, there is a regime of parameters in which Josephson oscillations between a vortex-carrying atomic condensate (finite momentum BEC) and a conventional zero-momentum molecular condensate may be realized. The experimental observation of the oscillations between these qualitatively distinct BEC's is possible with state-of-the-art Ramsey interference techniques.