Ballot design can have a huge impact on voter participation, especially in nonpartisan elections

The ballot is one of the most fundamental implements of democracy – but can ballot design influence the outcome of an election? Chris W. Bonneau and Eric Loepp find that ballots that give voters the ability to vote for all candidates with the same party label (the straight-ticket voting option) in multiple elections may have major consequences for electoral participation, especially in ‘down-ticket’ races. They argue that while straight ticket voting may enhance participation in these races if they are partisan, non-partisan ‘down ticket’ races are much more likely to see reduced voter participation

Quantum walks: a comprehensive review

Quantum walks, the quantum mechanical counterpart of classical random walks, is an advanced tool for building quantum algorithms that has been recently shown to constitute a universal model of quantum computation. Quantum walks is now a solid field of research of quantum computation full of exciting open problems for physicists, computer scientists, mathematicians and engineers. In this paper we review theoretical advances on the foundations of both discrete- and continuous-time quantum walks, together with the role that randomness plays in quantum walks, the connections between the mathematical models of coined discrete quantum walks and continuous quantum walks, the quantumness of quantum walks, a summary of papers published on discrete quantum walks and entanglement as well as a succinct review of experimental proposals and realizations of discrete-time quantum walks. Furthermore, we have reviewed several algorithms based on both discrete- and continuous-time quantum walks as well as a most important result: the computational universality of both continuous- and discrete- time quantum walks.Comment: Paper accepted for publication in Quantum Information Processing Journa