Shukrinov Y.M.,BLTP |
Hamdipour M.,Institute for Advanced Studies in Basic Sciences |
Kolahchi M.R.,Institute for Advanced Studies in Basic Sciences |
Botha A.E.,University of South Africa |
Suzuki M.,Kyoto University
Physics Letters, Section A: General, Atomic and Solid State Physics | Year: 2012
Manifestation of chaos in the temporal dependence of the electric charge is demonstrated through the calculation of the maximal Lyapunov exponent, phase-charge and charge-charge Lissajous diagrams and correlation functions. It is found that the number of junctions in the stack strongly influences the fine structure in the current-voltage characteristics and a strong proximity effect results from the nonperiodic boundary conditions. The observed resonance-related chaos exhibits intermittency. The criteria for a breakpoint region with no chaos are obtained. Such criteria could clarify recent experimental observations of variations in the power output from intrinsic Josephson junctions in high temperature superconductors. © 2012 Elsevier B.V.
Physics of Particles and Nuclei Letters | Year: 2015
We discuss a U(1) gauged version of the 2+1 dimensional planar Skyrme model supplemented by the Maxwell term. We show that there exist variety of static multi-soliton configurations coupled to the noninteger fluxes of magnetic field, which revert to the usual planar Skyrmions in the limit of the gauge coupling constant vanishing. The structure of the multisoliton solutions of the model strongly depends on the particular choice of the potential term which may break the rotational invariance. We investigate the dependency of the shapes, masses and magnetic fluxes of the gauged planar Skyrmions with broken symmetry on the gauge coupling constant. We further find that in the strong coupling limit the magnetic fluxes associated with the parton components of the solitons became quantized in fractional units of topological charge. © 2015, Pleiades Publishing, Ltd.
Hyperfine Interactions | Year: 2012
Neutron spectra from the low-energy K - + d → π + Σ + n reaction were calculated. This quantity should carry information on the Λ(1405) resonance. We checked the possibility of extracting this information. © 2012 Springer Science+Business Media B.V.
Nuclear Physics B - Proceedings Supplements | Year: 2011
The new manifestations of Axial Anomaly (AA) are considered. The generalization of dispersive approach to AA and its applications to hadronic physics are outlined. The couplings of quark currents to magnetic fields and vorticity generated in heavy-ion collisions are also discussed. © 2011.
Mandal S.,Institute of Physics, Bhubaneswar |
Maiti M.,BLTP |
Varma V.K.,Abdus Salam International Center For Theoretical Physics
Physical Review B - Condensed Matter and Materials Physics | Year: 2016
We investigate the von Neumann entanglement entropy and Schmidt gap in the vortex-free ground state of the Kitaev model on the honeycomb lattice for square/rectangular and cylindrical subsystems. We find that, for both the subsystems, the free-fermionic contribution to the entanglement entropy SE exhibits signatures of the phase transitions between the gapless and gapped phases. However, within the gapless phase, we find that SE does not show an expected monotonic behavior as a function of the coupling Jz between the suitably defined one-dimensional chains for either geometry; moreover, the system generically reaches a point of minimum entanglement within the gapless phase before the entanglement saturates or increases again until the gapped phase is reached. This may be attributed to the onset of gapless modes in the bulk spectrum and the competition between the correlation functions along various bonds. In the gapped phase, on the other hand, SE always monotonically varies with Jz independent of the subregion size or shape. Finally, further confirming the Li-Haldane conjecture, we find that the Schmidt gap Δ defined from the entanglement spectrum also signals the topological transitions but only if there are corresponding zero-energy Majorana edge states that simultaneously appear or disappear across the transitions. We analytically corroborate some of our results on entanglement entropy, the Schmidt gap, and the bulk-edge correspondence using perturbation theory. © 2016 American Physical Society.