42 citations · 90 across the 5 of their papers we have counts for
5 papers
Large-field versus discontinuous instantons in spin orientation tunneling
Anupam Garg, Ersin Kececioglu
Tunnel splitting oscillations in magnetic molecules are reconsidered within the simplest model for the problem, which does not contain fourth order anisotropy. It is shown that at…
Spin Tunneling in Magnetic Molecules: Quasisingular Perturbations and Discontinuous SU(2) Instantons
Ersin Kececioglu, Anupam Garg
Spin coherent state path integrals with discontinuous semiclassical paths are investigated with special reference to a realistic model for the magnetic degrees of freedom in the Fe…
SU(2) instantons with boundary jumps and spin tunneling in magnetic molecules
Ersin Kececioglu, Anupam Garg
Coherent state path integrals are shown in general to contain instantons with jumps at the boundaries, i.e., with boundary points lying outside classical parameter or phase space.…
Diabolical Points in Magnetic Molecules: An Exactly Solvable Model
Ersin Kececioglu, Anupam Garg
The magnetic molecule Fe_8 has been observed to have a rich pattern of degeneracies in its magnetic spectrum as the static magnetic field applied to the molecule is varied. The poi…
A generalizad Fokker-Planck equation for the ratchet problem: Memory effects
E. Kececioglu, B. Tanatar, M. Cemal Yalabik
We study stochastic ratchets with inertia in the limit where the time correlations become important. We have developed a Fokker-Planck type equation for the ratchet problem which i…