Variational quantum algorithms dominate gate-based applications of modern processors. The so-called layerwise trainability conjecture appears in various works throughout the variational computing literature. asserts that a circuit can be trained piecewise, e.g., few layers sequence to minimize an objective function. Here, we prove this false. Counterexamples are found by considering functions e...

We present a comprehensive investigation of the evolution helimagnetic correlations in Mn$_{1-x}$Fe$_x$Si with increasing doping. By combining polarised neutron scattering and high resolution Neutron Spin Echo spectroscopy we investigate three samples $x$=0.09, 0.11 0.14, i.e. compositions on both sides concentration $x^* \sim 0.11$ where Bragg peaks disappear between $x^*$ quantum critical $x_...

The hypothesis that abrupt visual onsets capture attention automatically, as suggested by Yantis and Jonides (1984) was tested in four experiments. A centrally located cue directed attention to one of several stimulus positions in preparation for the identification of a target letter embedded in an array of distractor letters. In all experiments, one stimulus (either the target or one of the di...