47 citations · 54 across the 2 of their papers we have counts for
7 papers
3D Lorentzian Quantum Gravity from the asymmetric ABAB matrix model
J. Ambjorn, J. Jurkiewicz, R. Loll +1
The asymmetric ABAB-matrix model describes the transfer matrix of three-dimensional Lorentzian quantum gravity. We study perturbatively the scaling of the ABAB-matrix model in the…
Is Econophysics a Solid Science?
Z. Burda, J. Jurkiewicz, M. A. Nowak
Econophysics is an approach to quantitative economy using ideas, models, conceptual and computational methods of statistical physics. In recent years many of physical theories like…
Free Levy Matrices and Financial Correlations
Z. Burda, J. Jurkiewicz, M. A. Nowak +2
We consider a covariance matrix composed of asymmetric and free random Levy matrices. We use the results of free random variables to derive an algebraic equation for the resolvent…
Levy Matrices and Financial Covariances
Z. Burda, J. Jurkiewicz, M. A. Nowak +2
In a given market, financial covariances capture the intra-stock correlations and can be used to address statistically the bulk nature of the market as a complex system. We provide…
Free Random Levy Matrices
Z. Burda, R. A. Janik, J. Jurkiewicz +3
Using the theory of free random variables (FRV) and the Coulomb gas analogy, we construct stable random matrix ensembles that are random matrix generalizations of the classical one…
Lorentzian and Euclidean Quantum Gravity - Analytical and Numerical Results
J. Ambjorn, J. Jurkiewicz, R. Loll
We review some recent attempts to extract information about the nature of quantum gravity, with and without matter, by quantum field theoretical methods. More specifically, we work…