190 citations · 525 across the 19 of their papers we have counts for
19 papers
The weak password problem: chaos, criticality, and encrypted p-CAPTCHAs
T. V. Laptyeva, S. Flach, K. Kladko
Vulnerabilities related to weak passwords are a pressing global economic and security issue. We report a novel, simple, and effective approach to address the weak password problem.…
On the correllation effect in Peierls-Hubbard chains
J. Malek, S. -L. Drechsler, S. Flach +2
We reexamine the dimerization, the charge and the spin gaps of a half-filled Peierls-Hubbard chain by means of the incremental expansion technique. Our numerical findings are in si…
Theory of 2D metal-insulator transition I: Zero Magnetic field
Konstantin Kladko
We propose a scaling theory of 2D metal insulator transition discovered by Kravchenko and coworkers. In this theory conductance/resistance duality is an exact relation. The exponen…
On some upper bounds for spin velocity and instability of gapless state of 1-d Heisenberg chains
Konstantin Kladko
We derive upper bounds for spin velocity in half-integer-spin Heisenberg antiferromagnetic chains. We relate these upper bounds to the instability of the gapless state, which is ob…
Intrinsic localized modes in the charge-transfer solid PtCl
Konstantin Kladko, Jiri Malek, Alan R. Bishop
We report a theoretical analysis of intrinsic localized modes in a quasi-one-dimensional charge-transfer-solid (PtCl). We discuss strongly nonli…
Quasiclassical Hamiltonians for large-spin systems
D. A. Garanin, K. Kladko, P. Fulde
We propose a method for obtaining effective classical Hamiltonians \cal H for many-body quantum spin systems with large spins. This method uses the coherent-state representation of…