Causality between Stock Returns and Macroeconomic Variables in Emerging Markets

[No abstract available

Entanglement spectrum degeneracy and the Cardy formula in 1+1 dimensional conformal field theories

We investigate the effect of a global degeneracy in the distribution of the entanglement spectrum in conformal field theories in one spatial dimension. We relate the recently found universal expression for the entanglement Hamiltonian to the distribution of the entanglement spectrum. The main tool to establish this connection is the Cardy formula. It turns out that the Affleck-Ludwig non-integer degeneracy, appearing because of the boundary conditions induced at the entangling surface, can be directly read from the entanglement spectrum distribution. We also clarify the effect of the noninteger degeneracy on the spectrum of the partial transpose, which is the central object for quantifying the entanglement in mixed states. We show that the exact knowledge of the entanglement spectrum in some integrable spinchains provides strong analytical evidences corroborating our results

Analysis of photoneutron cross section accuracy obtained at quasimonochromatic gamma-beams

Using gamma-spectroscopic methods, comparative measurements of (γ, n) reaction yields on the isotopes 140Се and 142Се were carried out in the energy region of 9 - 18 MeV using gamma-quanta. It was shown, that for the isotopes of Cerium using the quasimonochromatic beams of photons [1] the error of the measurement of the (γ, n) reaction cross section due to the contribution of the (γ, 2n) reaction did not exceed 2%