New global periodic orbit collision and separatrix reconnection scenarios exhibited by the standard nontwist map are described in detail, including exact methods for determining reconnection… (More)

The breakup of the shearless invariant torus with winding number ω = √ 2 − 1 is studied numerically using Greene’s residue criterion in the standard nontwist map. The residue behavior and parameter… (More)

The breakup of shearless invariant tori with winding number omega=(11+gamma)(12+gamma) (in continued fraction representation) of the standard nontwist map is studied numerically using Greene's… (More)

The breakup of shearless invariant tori with winding number = 11+ / 12+ in continued fraction representation of the standard nontwist map is studied numerically using Greene’s residue criterion. Tori… (More)

We examine a two-dimensional electron waveguide with a cut-circle cavity and conical leads. By considering Wigner delay times and the Landauer-Büttiker conductance for this system, we probe the… (More)