Zobrazeno 1 - 10
of 208
pro vyhledávání: '"Kladko, K."'
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. Building upon chaotic dynamics, criticality at phase transitions, CAP
Externí odkaz:
http://arxiv.org/abs/1103.6219
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 significant quantitative conflict with recently obtained results by M. S
Externí odkaz:
http://arxiv.org/abs/cond-mat/0210349
Publikováno v:
Eur. Phys. J. B 14, 293-300 (2000)
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 the partition function Z and the cumulant expansion in powers of 1/S.
Externí odkaz:
http://arxiv.org/abs/cond-mat/9905061
We develop a general mapping from given kink or pulse shaped travelling-wave solutions including their velocity to the equations of motion on one-dimensional lattices which support these solutions. We apply this mapping - by definition an inverse met
Externí odkaz:
http://arxiv.org/abs/patt-sol/9812004
We formulate the calculation of the ground-state wavefunction and energy of a system of strongly correlated electrons in terms of scattering matrices. A hierarchy of approximations is introduced which results in an incremental expansion of the energy
Externí odkaz:
http://arxiv.org/abs/cond-mat/9812032
Publikováno v:
Europhys. Lett. 46, 425-430 (1999)
A method is proposed for obtaining a systematic expansion of thermodynamic functions of spin systems with large spin S in powers of 1/S. It uses the cumulant technique and a coherent-state representation of the partition function Z. The expansion of
Externí odkaz:
http://arxiv.org/abs/cond-mat/9811254
A generalization of Faddeev's approach of the 3-body problem to the many-body problem leads to the method of increments. This method was recently applied to account for the ground state properties of Hubbard-Peierls chains (JETP Letters 67 (1998) 105
Externí odkaz:
http://arxiv.org/abs/cond-mat/9810371
Publikováno v:
PHYSICAL REVIEW LETTERS, 76(#10)1607-1610 MAR 4,1996
We analyze the classical and quantum properties of the integrable dimer problem. The classical version exhibits exactly one bifurcation in phase space, which gives birth to permutational symmetry broken trajectories and a separatrix. The quantum anal
Externí odkaz:
http://arxiv.org/abs/cond-mat/9808332
Publikováno v:
EUROPHYSICS LETTERS,43(#3)326,1998
We consider the contribution of magnetic impurities to the nuclear magnetic susceptibility $\chi$ and to the specific heat $C$ of a metal. The impurity contribution to the magnetic susceptibility has a $1/T^2$ behaviour, and the impurity contribution
Externí odkaz:
http://arxiv.org/abs/cond-mat/9709151
Autor:
Flach, S., Kladko, K.
Publikováno v:
PHYSICAL REVIEW E, 54(#3), 2912-2916 SEP 1996
We present a perturbation theory of kink solutions of discrete Klein-Gordon chains. The unperturbed solutions correspond to the kinks of the adjoint partial differential equation. The perturbation theory is based on a reformulation of the discrete ch
Externí odkaz:
http://arxiv.org/abs/cond-mat/9709069