2003/05/31 by D. V. Fil, S. I. Shevchenko
Chemistry · Physics and Astronomy · #Bilayer #Chemistry #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Current (fluid) #Drag #Drag coefficient #Josephson effect #Magnetic field #Magnetic flux #Mechanics #Persistent current #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Quantum, superfluid, helium dynamics #Superconductivity #Superfluidity #cond-mat.soft
paper · pdf · doi:10.1063/1.1808194
published as Low Temp. Phys. -- 2004 -- V. 30, - pp. 770-777 · 12 pages, 2 figures, new section is added, refs are added
arxiv created 2004/04/20 · openalex publication_date 2004/10/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
An effect of nondissipative drag of a superfluid flow in a system of two Bose gases confined in two parallel quasi-two-dimensional traps is studied. Using an approach based on the introduction of density and phase operators, we compute the drag current at zero and finite temperatures for arbitrary ratio of particle densities in the adjacent layers. We demonstrate that in a system of two ring-shaped traps the “drag force” influences the drag trap in the same way as an external magnetic flux influences a superconducting ring. This allows one to use the drag effect to control persistent current states in superfluids and opens up the possibility of implementing a Bose analog of the superconducting Josephson flux qubit.