n this report, novel series of unsaturated polyesters Vad and VIad containing indazole moiety were successfully prepared via interfacial polycondensation technique of indazole derivatives III and IV with different aromatic and aliphatic acid chlorides; isophthaloyl, terephthaloyl, adipoyl, and sebacoyl chlorides. The prepared polyesters were categorized by elemental analyses, IR, ¹H NMR, Mass spectra, GPC, Thermogravimetric (TGA), X-ray analyses (XRD), and therefore the morphology was examined by scanning microscopy (SEM). They showed high thermal stability and different morphology structure. The corrosion protection performance of prepared polyesters Vad and VIad on X65steel in molar oil of vitriol was assessed using potentiodynamic polarization (PDP), electrochemical impedance spectroscopy (EIS), and SEM. Electrochemical tests (EIS and PDP) displayed polymers could efficiently impede the …

We formulate the tripartite entropic uncertainty relation and predict its lower bound in a three-qubit Heisenberg XXZ spin chain when measuring an arbitrary pair of incompatible observables on one qubit while the other two are served as quantum memories. Our study reveals that the entanglement between the nearest neighbors plays an important role in reducing the uncertainty in measurement outcomes. In addition we have shown that the Dolatkhah’s lower bound (Phys Rev A 102(5):052227, 2020) is tighter than that of Ming (Phys Rev A 102(01):012206, 2020) and their dynamics under phase decoherence depends on the choice of the observable pair. In the absence of phase decoherence, Ming’s lower bound is time-invariant regardless the chosen observable pair, while Dolatkhah’s lower bound is perfectly identical with the tripartite uncertainty with a specific choice of pair.

We investigate the nonclassical correlations via local quantum Fisher information
(LQFI), local quantum uncertainty (LQU) and logarithmic negativity for the two-qubit Ising
model under a magnetic field in an arbitrary direction. The nonclassical correlations of LQFI, LQU and LN are explicitly derived when the magnetic field is perpendicular to the direction of the two-qubit Heisenberg Ising model. While when the magnetic field has an arbitrary direction, they are investigated numerically. The closed forms of the LQFI and LQU confirm the inequality between the quantum Fisher information and skewinformation, where the LQFI is always greater than or equal to the LQU, and both of them show very similar behavior with different amplitudes. It is found that when the system is in its ground state, the LQFI and LQU have the same closed form which can be used in calculating the LN. The dependence of the nonclassical correlations on the direction of the magnetic field is investigated with the effects of the magnitude of the applied magnetic field and the spin interaction coupling. The phenomenon of sudden change for the LQFI and LQU and the sudden death and sudden birth of the entanglement depend on the temperature and the magnitude of the applied magnetic field.