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Automatic Programming of Cellular Automata and Artificial Neural Networks Guided by Philosophy
(2019)arXivMany computer models such as cellular automata have been developed and successfully applied. However, in some cases these models might be restrictive on the possible solutions or their solution is difficult to interpret. To overcome this problem, we outline an approach, the so-called allagmatic method, that automatically creates and programs models with as little limitations as possible but still maintaining human interpretability. We ...Working Paper -
Accuracy enhancing protocols for quantum clocks
(2019)arXivThe accuracy of the time information generated by clocks can be enhanced by allowing them to communicate with each other. Here we consider a basic scenario where a quantum clock receives a low-accuracy time signal as input and ask whether it can generate an output of higher accuracy. We propose protocols that, using a clock with a $d$-dimensional state space, achieve an accuracy enhancement by a factor $d$ (in the limit of large $d$). If ...Working Paper -
Local gravitational energy in higher dimensions
(2019)arXivIn general relativity, the local gravitational energy is best characterised by the quasilocal mass. The small sphere limit of quasilocal mass provides us the most local notion of gravitational energy. In four dimensions, the limits were shown be the stress tensor in non-vacuum and the Bel-Robinson tensor in vacuum. We study the local gravitational energy in higher dimensions through the lens of the small sphere limits of various quasilocal ...Working Paper -
Introduction to UniversalQCompiler
(2019)arXivWe introduce an open source software package UniversalQCompiler written in Mathematica that allows the decomposition of arbitrary quantum operations into a sequence of single-qubit rotations (with arbitrary rotation angles) and controlled-NOT (C-NOT) gates. Together with the existing package QI, this allows quantum information protocols to be analysed and then compiled to quantum circuits. Our decompositions are based on Phys. Rev. A 93, ...Working Paper -
Geocoding of worldwide patent data
(2019)KOF Working PapersThe dataset provides geographic coordinates for inventor and applicant locations in 18.8 million patent documents spanning over more than 30 years. The geocoded data are further allocated to the corresponding countries, regions and cities. When the address information was missing in the original patent document, we imputed it by using information from subsequent filings in the patent family. The resulting database can be used to study ...Working Paper -
Giant porphyry copper deposits require large magma reservoirs at the verge of eruption
(2019)Working Paper -
Russian-Western Blind Spots: From Dialogue on Contested Narratives to Improved Understanding
(2019)This report is the result of a collective effort by the participants in the Russian-German Dialogue Project ‘Reflecting on Conflict Narratives’. It draws on a dialogue process of two workshops held in Moscow and Berlin in September and November 2018. The report highlights the competing narratives following the end of the Cold War, outlines their consequences, and provides recommendations to increase Russian-German cooperation.Report -
Appliance-level Flexible Scheduling for Socio-technical Smart Grid Optimisation
(2019)arXivParticipation in energy demand response programs requires an active role by users of residential appliances: they contribute flexibility in how they use their appliances as the means to adjust energy consumption and improve Smart Grid reliability. Understanding the collective potential that appliance-level flexibility has on Smart Grid reliability is challenging and complex. Physical characteristics of appliances, usage preferences, habits, ...Working Paper