82 citations
- Bulgarian Academy of SciencesBG14 papers
- Sofia University "St. Kliment Ohridski"BG8 papers
- University of KaiserslauternDE2 papers
- University of OxfordGB2 papers
- Centre National de la Recherche ScientifiqueFR1 paper
- Charles Darwin UniversityAU1 paper
- Université Fédérale de Toulouse Midi-PyrénéesFR1 paper
- Université Toulouse III - Paul SabatierFR1 paper
- University Hospital MagdeburgDE1 paper
- University of California, Santa BarbaraUS1 paper
- University of Duisburg-EssenDE1 paper
- University of PaviaIT1 paper
7 papers · 1 filter
Diamond chains with multiple-spin exchange interactions
N. B. Ivanov, J. Richter, J. Schulenburg
We study the phase diagram of a symmetric spin-1/2 Heisenberg diamond chain with additional cyclic four-spin exchange interactions. The presented analysis supplemented by numerical…
Dynamic critical behavior of model A in films: Zero-mode boundary conditions and expansion near four dimensions
H. W. Diehl, H. Chamati
The critical dynamics of relaxational stochastic models with nonconserved -component order parameter and no coupling to other slow variables ("model A") is investigated i…
Intergranular flux pinning in underdoped and overdoped R(1-x)CaxBa2Cu3Oz (R=Y,Gd; x=0,0.2) samples
E. K. Nazarova, A. J. Zaleski, K. A. Nenkov +1
The temperature dependences of AC magnetic susceptibility at different magnetic field amplitudes and frequencies are investigated for underdoped and overdoped R(1-x)Ca(x)Ba(2)Cu(3)…
Resonant excitation amidst dephasing: An exact analytic solution
E. S. Kyoseva, N. V. Vitanov
An exact analytic solution is presented for coherent resonant excitation of a two-state quantum system driven by a time-dependent pulsed external field with a hyperbolic-secant sha…
Coherent pulsed excitation of degenerate multistate systems: Exact analytic solutions
E. S. Kyoseva, N. V. Vitanov
We show that the solution of a multistate system composed of N degenerate lower (ground) states and one upper (excited) state can be reduced by using the Morris-Shore transformatio…
Decoherence-free preparation of Dicke states of trapped ions by collective stimulated Raman adiabatic passage
I. E. Linington, N. V. Vitanov
We propose a simple technique for the generation of arbitrary-sized Dicke states in a chain of trapped ions. The method uses global addressing of the entire chain by two pairs of d…