Synthetic complex Weyl superconductors, chiral Josephson effect and synthetic half-vortices

We show that the most generic form of spin-singlet superconducting order parameter for chiral fermions is of the $\Delta_s+i\gamma^5\Delta_5$ where $\Delta_s$ is the usual order parameter and $\Delta_5$ is the pseudo-scalar order parameter. After factoring out the $U(1)$ phase $e^{i\phi}$, this form of superconductivity admits yet additional complex structure in the plane of $(\Delta_s,\Delta_5)$. The polar angle $\chi$ in this plane dubbed chiral angle will be locked to the $U(1)$ phase $\phi$. We propose a synthetic setup based on stacking of topological insulators (TIs) and superconductors (SCs). Alternatively flux biasing the superconductors with a fluxes $\pm\Phi$ leads to $\Delta_5=\Delta_0 \sin(\chi)$, where $\Delta_0$ is the superconducting order parameter of the SC layers, and the chiral angle $\chi=\Phi/\Phi_0$ is directly given by the flux $\Phi$ in units of the flux quantum $\Phi_0=h/(2e)$. This can be used as a building block to construct a two-dimensional Josephson array. In this setup $\chi$ will be a background field defining a pseudoscalar $\Delta_5$ that can be tuned to desired configuration. While in a uniform background field $\Delta_5$ the dynamics of $\phi$ is given by standard XY model and its associated vortices, a {\em staggered} background $\pm\Delta_5$ (or equivalently $\chi$ and $\chi+\pi$ in alternating lattice sites) creates a new set of minima for the $\phi$ field that will support half-vortex excitations. An isolated single synthetic "half-vortex" in the $\chi$ field in an otherwise uniform background will bind a $\phi$-half-vortex. This is similar to the way a p-wave superconducting vortex core binds a Majorana fermion

Gambaran Tingkat Stress Kerja Antar Shift Kerja Pada Petugas Pengumpul Tol Surabaya

PT. (X), Surabaya is one of company that manages toll road or highway that implement the shift system of work. Shift work has the potential for job stress and other health problems. The purpose of this research was to identify descriptive the level of job stress between shift work at the toll collector in PT. (X), Surabaya. This research was an observational analytic study with cross sectional approach. 36 toll collector who work when the morning shift, afternoon, and evening at the toll gate x, toll gate y and toll gate z were chosen as sample by using Proportional Random Sampling method. The results showed when the shift I (morning) there were 15 respondents (41.7%) suffered mild job stress and 21 respondents (58.3%) suffered moderate job stress. At the shift II (evening) there were 12 respondents (33.3%) suffered mild stress of work and 24 respondents (66.7%) suffered moderate job stress, while at the shift III (evening) were 9 respondents (25%) suffered light work stress and 27 respondents (75%) suffered moderate job stress. Based on the research results, it can be concluded the level of job stress between of shift work on the toll collectors suffered mild and moderate stress. The greatest frequency of respondents suffered moderate job stress. Recommendation for the company is review the system of career development and maintaining training activities, while for workers is use the time to rest and regular exercise