Another integrable case in the Lorenz model

A scaling invariance in the Lorenz model allows one to consider the usually discarded case sigma=0. We integrate it with the third Painlev\'e function.Comment: 3 pages, no figure, to appear in J. Phys.

Light-mediated strong coupling between a mechanical oscillator and atomic spins one meter apart

Engineering strong interactions between quantum systems is essential for many phenomena of quantum physics and technology. Typically, strong coupling relies on short-range forces or on placing the systems in high-quality electromagnetic resonators, restricting the range of the coupling to small distances. We use a free-space laser beam to strongly couple a collective atomic spin and a micromechanical membrane over a distance of one meter in a room-temperature environment. The coupling is highly tunable and allows the observation of normal-mode splitting, coherent energy exchange oscillations, two-mode thermal noise squeezing and dissipative coupling. Our approach to engineer coherent long-distance interactions with light makes it possible to couple very different systems in a modular way, opening up a range of opportunities for quantum control and coherent feedback networks.Comment: 24 pages, 9 figure

Confirmation Bias in Adoption of Seeker Exemplars in Crowdsourcing Ideation Contests

This study examineshow solutionexemplarsthat seekers providein crowdsourcing ideation contestsaffect the scanning, shortlisting, and selection of ideas by solvers; thesethreeideation activities are essential layersin the Knowledge Reuse for Radical Innovation model.Specifically, we consider the role of confirmation bias in solvers’ behaviors and their use of seeker exemplarsinthe ideation activities. We posit that solvers’ use of exemplars is affected by the extent to which the exemplars are consistent with solvers’ prior beliefand by different considerations in different ideation activities. The results from a crowdsourcing ideationcontest experiment largely support our theorizing, as we find that problem-related and problem-unrelated seeker exemplars affecteddifferent ideation activitiesdifferently. This research contributes insights into seeker involvements and solver behaviors in crowdsourcing ideation contests and offers practical implications for seekers

The effect of subgroup homogeneity of efficacy on contribution in public good dilemmas

open access articleThis paper examines how to maximize contribution in public good dilemmas by arranging people into homogeneous or heterogeneous subgroups. Past studies on the effect of homo- geneity of efficacy have exclusively manipulated group composition in their experimental designs, which might have imposed a limit on ecological validity because group membership may not be easily changed in reality. In this study, we maintained the same group composi- tion but varied the subgroup composition. We developed a public good dilemmas paradigm in which participants were assigned to one of the four conditions (high- vs. low-efficacy; homogeneous vs. heterogeneous subgroup) to produce their endowments and then to decide how much to contribute. We found that individuals in homogeneous and heteroge- neous subgroups produced a similar amount and proportion of contribution, which was due to the two mediating effects that counteracted each other, namely (a) perceived efficacy rel- ative to subgroup and (b) expectation of contribution of other subgroup members. This paper demonstrates both the pros and cons of arranging people into homogeneous and het- erogeneous subgroups of efficacy