Correlated correlation functions in random-bond ferromagnets

نویسندگان
چکیده

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Correlated correlation functions in random-bond ferromagnets

The two-dimensional random-bond Q-state Potts model is studied for Q near 2 via the perturbative renormalisation group to one loop. It is shown that weak disorder induces cross-correlations between the quenched-averages of moments of the two-point spin/spin and energy/energy correlation functions, which should be observable numerically in specific linear combinations of various quenched correla...

متن کامل

Correlation functions in the two-dimensional random-bond Ising model.

We consider long strips of finite width L ≤ 13 sites of ferromagnetic Ising spins with random couplings distributed according to the binary distribution: P (Jij) = 1 2(δ(Jij − J0) + δ(Jij − rJ0)), 0 < r < 1. Spin-spin correlation functions < σ0σR > along the “infinite” direction are computed by transfer-matrix methods, at the critical temperature of the corresponding two-dimensional system, and...

متن کامل

Freezing in random graph ferromagnets.

Using T=0 Monte Carlo and simulated annealing simulation, we study the energy relaxation of ferromagnetic Ising and Potts models on random graphs. In addition to the expected exponential decay to a zero energy ground state, a range of connectivities for which there is power law relaxation and freezing to a metastable state is found. For some connectivities this freezing persists even using simu...

متن کامل

Correlation Functions for Random Involutions

Our interest is in the scaled joint distribution associated with k-increasing subsequences for random involutions with a prescribed number of fixed points. We proceed by specifying in terms of correlation functions the same distribution for a Poissonized model in which both the number of symbols in the involution, and the number of fixed points, are random variables. From this, a de-Poissonizat...

متن کامل

Magnetic critical behavior of two-dimensional random-bond Potts ferromagnets in confined geometries.

We present a numerical study of two-dimensional random-bond Potts ferromagnets. The model is studied both below and above the critical value Qc=4, which discriminates between second- and first-order transitions in the pure system. Two geometries are considered, namely cylinders and square-shaped systems, and the critical behavior is investigated through conformal invariance techniques that were...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Nuclear Physics B

سال: 2000

ISSN: 0550-3213

DOI: 10.1016/s0550-3213(99)00786-5