Les 10 concurrents quantiki.org les plus visités

quantumcomputing.stackexchange.com

Q&A for engineers, scientists, programmers, and computing professionals interested in quantum computing

arxiv.org

A system of non-tradable credits that flow between individuals like karma, hence proposed under that name, is a mechanism for repeated resource allocation that comes with attractive efficiency and fairness properties, in theory. In this study, we test karma in an online experiment in which human subjects repeatedly compete for a resource with time-varying and stochastic individual preferences or urgency to acquire the resource. We confirm that karma has significant and sustained welfare benefits even in a population with no prior training. We identify mechanism usage in contexts with sporadic high urgency, more so than with frequent moderate urgency, and implemented as a simple (binary) karma bidding scheme as particularly effective for welfare improvements: relatively larger aggregate efficiency gains are realized that are (almost) Pareto superior. These findings provide guidance for further testing and for future implementation plans of such mechanisms in the real world.

techrxiv.org

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researchhub.com

ResearchHub is a collaborative community seeking to improve prioritization, collaboration, reproducibility, and funding of scientific research. Join us to discuss and discover academic research.

qit.ethz.ch

We congratulate Tony Metger on successfully passing his PhD defense with a thesis titled "Bounding entropies in general sequential quantum processes"! Tony is going to pursue a postdoc at Berkeley. We wish him the best of luck for his career!

chemrxiv.org

Single atom catalysts have gained significant attention due to their promise of maximum atom utilization and uniform active sites. However, significant knowledge gaps remain regarding how coordination environments evolve under realistic operating conditions and how that affects their ability to participate in chemical and physical processes. This study used infrared spectroscopy to investigate the effect of thermal chemical preprocessing on the 13CO adsorption capacity of 0.034 wt.% Pd/CeO2 to yield monomeric palladium carbonyl complexes. While the (13CO) band frequency of the monomer was only slightly responsive to thermal chemical preprocessing, the monomer density spanned an order-of-magnitude. The breadth of the monomer density suggests that single-atom coordination environments are better described as a distribution that can be systematically manipulated to control chemical processes as opposed to static, uniform active sites. Changes in the Pd coordination ensemble, manifested as changes in the monomer density, represented distinct metastable states that were accessed through specific thermal chemical histories. The dependence of the coordination ensemble on thermal chemical history led to different monomer densities under identical experimental conditions. This observation revealed that thermal chemical preprocessing is non-deterministic and that the Pd coordination ensemble is kinetically controlled rather than thermodynamically determined. This work establishes a methodology that uses molecules as both sensitive diagnostics and synthetic tools to direct material properties. The ability to reversibly control coordination distributions opens new pathways for catalyst design and provides fundamental insights into the dynamic nature of atomically dispersed metals.

authorea.com

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