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Superfluid to Mott insulator quantum phase transition in a 2D permanent magnetic lattice

Ghanbari, Saeed; Blakie, P. Blair; Hannaford, Peter; … - In: The European Physical Journal B - Condensed Matter and … 70 (2009) 3, pp. 305-310

Persistent link: https://www.econbiz.de/10009282401

Enhanced fluxon transmission through impurities

Zolotaryuk, Y. - In: The European Physical Journal B - Condensed Matter and … 62 (2008) 3, pp. 349-355

Fluxon transmission through several impurities of different strength and type (i.e., microshorts and microresistors), placed in a long Josephson junction is investigated. Retrapping current on the impurities is computed as a function of the distance between them, their amplitudes and the...

Persistent link: https://www.econbiz.de/10009282594

On the critical point of an interacting two-dimensional trapped Bose gas

Simula, T. P. - In: The European Physical Journal B - Condensed Matter and … 68 (2009) 3, pp. 453-455

Persistent link: https://www.econbiz.de/10009282610

Physical realization and possible identification of topological excitations in quantum Heisenberg anti-ferromagnet on a two dimensional lattice

Chaudhury, R.; Paul, S. K. - In: The European Physical Journal B - Condensed Matter and … 69 (2009) 4, pp. 491-498

Persistent link: https://www.econbiz.de/10009282822

Numerical study of detailed flow field and performance of Savonius wind turbines

Zhou, Tong; Rempfer, Dietmar - In: Renewable Energy 51 (2013) C, pp. 373-381

The Savonius vertical axis wind turbine is simple in structure, has good starting characteristics, relatively low operating speeds, and an ability to accept wind from any direction, although it has a lower efficiency than some other vertical axis wind turbines. So far a number of experimental...

Persistent link: https://www.econbiz.de/10010805445

Soliton trains and vortex streets as a form of Cerenkov radiation in trapped Bose–Einstein condensates

Carretero-González, R.; Kevrekidis, P.G.; … - In: Mathematics and Computers in Simulation (MATCOM) 74 (2007) 4, pp. 361-369

We numerically study the nucleation of gray solitons and vortex–antivortex pairs created by a moving impurity in, respectively, 1D and 2D Bose–Einstein condensates (BECs) confined by a parabolic potential. The simulations emulate the motion of a localized laser-beam spot through the trapped...

Persistent link: https://www.econbiz.de/10011050487

Vortices in rotating Bose–Einstein condensates confined in homogeneous traps

Rindler-Daller, T. - In: Physica A: Statistical Mechanics and its Applications 387 (2008) 8, pp. 1851-1874

We investigate analytically the thermodynamical stability of vortices in the ground state of rotating 2D Bose … contributions due to vortices. As an application, we consider a general potential of the form V(x,y)=(x2+λ2y2)s/2 with slope s∈[2 … derive the critical angular velocities for the existence of vortices and show that all vortices are single …

Persistent link: https://www.econbiz.de/10011057081

Entropic Coulomb Forces in Ising and Potts Antiferromagnets and Ice Models

Moore, Cristopher; Nordahl, Mats G.; Minar, Nelson; … - Santa Fe Institute - 1999

We study topological defects in the triangular Ising antiferromagnet, a related model on the square lattice equivalent to the six-vertex ice model, and the three-state antiferromagnetic Potts model on the square lattice. We suggest that in each case, defects are attracted or repelled with a...

Persistent link: https://www.econbiz.de/10005623656