Reconciling Conflicting Approaches for the Tunneling Time Delay in Strong Field Ionization

Several recent attoclock experiments have investigated the fundamental question of a quantum mechanically induced time delay in tunneling ionization via extremely precise photoelectron momentum spectroscopy. The interpretations of those attoclock experimental results were controversially discussed, because the entanglement of the laser and Coulomb field did not allow for theoretical treatments without undisputed approximations. The method of semiclassical propagation matched with the tunneled wave function, the quasistatic Wigner theory, the analytical R-matrix theory, the backpropagation method, and the under-the-barrier recollision theory are the leading conceptual approaches put forward to treat this problem, however, with seemingly conflicting conclusions on the existence of a tunneling time delay. To resolve the contradicting conclusions of the different approaches, we consider a very simple tunneling scenario which is not plagued with complications stemming from the Coulomb potential of the atomic core, avoids consequent controversial approximations and, therefore, allows us to unequivocally identify the origin of the tunneling time delay.

Can a brief training intervention on schizophrenia and depression improve knowledge, attitudes and practices of primary healthcare workers? The experience in Armenia

BACKGROUND

Although the World Health Organization has called for mental health services to be integrated into primary care, mental health remains in most countries, and especially in low- and middle-income countries, one of the most neglected topics in the training curriculum of frontline health workers. As a result, primary healthcare professionals leave medical and nursing schools with insufficient knowledge, and often with negative attitudes towards mental disorders.

AIM

We investigated the effect of a brief training intervention on schizophrenia and depression conducted among general practitioners and nurses in Armenia.

METHODS

Training interventions were one-day, face-to-face, interactive workshops, including didactic presentations and discussions of case studies. We used a quasi-experimental design of the before/after type, to compare data on knowledge, attitudes and practices collected before and after the training sessions.

RESULTS

Mean scores for knowledge, attitudes and practices increased significantly (p < 0.001) among both nurses and GPs for both schizophrenia (111 GPs and 167 nurses) and depression (459 GPs and 197 nurses).

CONCLUSIONS

Our experience suggests that a brief training intervention can result in significant improvements in knowledge, attitudes and practices among primary healthcare workers and could help improve mental health services.