Constraints from TcT_c and the isotope effect for MgB2_2

With the constraint that $T_c = 39$ K, as observed for MgB$_2$, we use the Eliashberg equations to compute possible allowed values of the isotope coefficient, $\beta$. We find that while the observed value $\beta= 0.32$ can be obtained in principle, it is difficult to reconcile a recently calculated spectral function with such a low observed value

Short time evolved wave functions for solving quantum many-body problems

The exact ground state of a strongly interacting quantum many-body system can be obtained by evolving a trial state with finite overlap with the ground state to infinite imaginary time. In this work, we use a newly discovered fourth order positive factorization scheme which requires knowing both the potential and its gradients. We show that the resultaing fourth order wave function alone, without further iterations, gives an excellent description of strongly interacting quantum systems such as liquid 4He, comparable to the best variational results in the literature.Comment: 5 pages, 3 figures, 1 tabl

Insights from the Federal Mediation and Conciliation Service

In recent years, mediation has become increasingly popular as a means to resolve conflict. One important issue that arises out of the recent explosive growth in the practice of mediation is. what do mediators need to know in order to assist the parties in resolving their conflicts? This research attemtps to identify the determinants of mediator competence by examining the knowledge, skills and abilities of mediators in public sector labor relations. The research focuses on the core competencies requirements for mediators with the Federal Mediation and Conciliation Service and suggests which of the competencies may be applicable to mediation in other contexts.Yeshttps://us.sagepub.com/en-us/nam/manuscript-submission-guideline