Catálogo de publicaciones - revistas

<jats:title>Making quick turns</jats:title> <jats:p> Hummingbirds are well known for their impressive maneuvering during flight. Dakin <jats:italic>et al.</jats:italic> used a computer vision approach to characterize the details of flight in &gt;200 hummingbirds from 25 species (see the Perspective by Wainwright). Larger species had enhanced agility owing to increased muscle mass. In all species, muscles dictated transitional movement, whereas wing shape facilitated sharp turns and rapid rotations. Species, and individuals within species, played on their strengths by combining inherent traits and learned skills. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6376" page="653" related-article-type="in-this-issue" vol="359" xlink:href="10.1126/science.aao7104">653</jats:related-article> ; see also p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6376" page="636" related-article-type="in-this-issue" vol="359" xlink:href="10.1126/science.aar7615">636</jats:related-article> </jats:p>

<jats:title>A window on hippocampal neurogenesis</jats:title> <jats:p> Addition of new neurons to the adult brain is key to the hippocampal functions of learning and memory. Pilz <jats:italic>et al.</jats:italic> labeled individual progenitor cells in the mouse hippocampus and watched them in situ for the next 2 months (see the Perspective by Götz). The results revealed the developmental progression as progenitor cells gave rise to mature cells of the dentate gyrus. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6376" page="658" related-article-type="in-this-issue" vol="359" xlink:href="10.1126/science.aao5056">658</jats:related-article> ; see also p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6376" page="639" related-article-type="in-this-issue" vol="359" xlink:href="10.1126/science.aar7732">639</jats:related-article> </jats:p>

<jats:title>Building up to superradiance, one by one</jats:title> <jats:p> Superradiance is a quantum phenomenon that occurs when emitters are sufficiently close to change spontaneous emission. Controlling the position and state of emitters within an atomic ensemble, however, is technically challenging. Kim <jats:italic>et al.</jats:italic> show that spatial correlations can be replaced by temporal correlations to achieve superradiance (see the Perspective by Meschede). They dropped prepared atoms into a high-quality optical cavity and found that the number of photons within the cavity built up superradiantly as the atoms dropped through one by one. The method provides a versatile platform for generating nonclassical states of light. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6376" page="662" related-article-type="in-this-issue" vol="359" xlink:href="10.1126/science.aar2179">662</jats:related-article> ; see also p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6376" page="641" related-article-type="in-this-issue" vol="359" xlink:href="10.1126/science.aas9067">641</jats:related-article> </jats:p>

<jats:title>Connecting quantum emitters</jats:title> <jats:p> Exploiting topological properties of a system allows certain properties to be protected against the disorder and scattering caused by defects. Barik <jats:italic>et al.</jats:italic> demonstrate a strong light-matter interaction in a topological photonic structure (see the Perspective by Amo). They created topological edge states at the interface between two photonic, topologically distinct regions and coupled them to a single quantum emitter. The chiral nature of single-photon emission was used to inject single photons of opposite polarization into counterpropagating topological edge states. Such a topological quantum optics interface may provide a powerful platform for developing robust integrated quantum optical circuits. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6376" page="666" related-article-type="in-this-issue" vol="359" xlink:href="10.1126/science.aaq0327">666</jats:related-article> ; see also p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6376" page="638" related-article-type="in-this-issue" vol="359" xlink:href="10.1126/science.aar7396">638</jats:related-article> </jats:p>

<jats:title>Programmed nanoparticle stacking</jats:title> <jats:p> A polymer pore template can control the order of assembly of nanoparticles into well-defined stacks and create superlattices. Lin <jats:italic>et al.</jats:italic> used DNA strands on gold nanoparticles to control interparticle distance. The DNA strands contained modified adenines with more rigid ribose groups that formed stronger base pairs. The height of the stacks of three different types of gold nanoparticle could be changed with different solvents, which in turn changed their optical response. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6376" page="669" related-article-type="in-this-issue" vol="359" xlink:href="10.1126/science.aaq0591">669</jats:related-article> </jats:p>

<jats:title>Seeding a laser amplifier</jats:title> <jats:p> Amplification of femtosecond laser pulses requires a lasing medium or a nonlinear crystal. The chemical properties of the lasing medium or adherence to momentum conservation rules in the nonlinear crystal constrain the frequency and the bandwidth of the amplified pulses. Vampa <jats:italic>et al.</jats:italic> seeded modulation instability in a laser crystal pumped with femtosecond near-infrared pulses. This provided a method for the high gain amplification of broadband and short laser pulses up to intensities of 1 terawatt per square centimeter. The method avoids constraints related to doping and phase matching and can be expected to be applied to a wide pool of glasses and crystals. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6376" page="673" related-article-type="in-this-issue" vol="359" xlink:href="10.1126/science.aaq0053">673</jats:related-article> </jats:p>

<jats:title>Crystallography of sensitive materials</jats:title> <jats:p> High-resolution transmission electron microscopy is an invaluable tool for looking at the crystalline structures of many materials. However, the need for high beam doses, especially as a sample is rotated to find the crystal axes, can lead to damage, particularly in fragile materials. Zhang <jats:italic>et al.</jats:italic> combined a state-of-the-art direct-detection electron-counting camera with ways to limit the overall electron dose to analyze delicate materials such as metal organic frameworks. With this approach, they could see the benzene rings in a UiO-66 linker and the coexistence of ligand-free (metal-exposing) and ligand-capped surfaces in UiO-66 crystals. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6376" page="675" related-article-type="in-this-issue" vol="359" xlink:href="10.1126/science.aao0865">675</jats:related-article> </jats:p>