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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 where
is the usual order parameter and is the pseudo-scalar
order parameter. After factoring out the phase , this form of
superconductivity admits yet additional complex structure in the plane of
. The polar angle in this plane dubbed chiral angle
will be locked to the phase . We propose a synthetic setup based
on stacking of topological insulators (TIs) and superconductors (SCs).
Alternatively flux biasing the superconductors with a fluxes leads to
, where is the superconducting order
parameter of the SC layers, and the chiral angle is directly
given by the flux in units of the flux quantum . This can
be used as a building block to construct a two-dimensional Josephson array. In
this setup will be a background field defining a pseudoscalar
that can be tuned to desired configuration. While in a uniform background field
the dynamics of is given by standard XY model and its
associated vortices, a {\em staggered} background (or
equivalently and in alternating lattice sites) creates a new
set of minima for the field that will support half-vortex excitations.
An isolated single synthetic "half-vortex" in the field in an otherwise
uniform background will bind a -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
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