Catálogo de publicaciones - revistas

<jats:title>Reading a molecule without destroying it</jats:title> <jats:p> Achieving efficient quantum control of ultracold molecular systems may open opportunities in molecular precision spectroscopy, quantum information, and related fields. Sinhal <jats:italic>et al.</jats:italic> report a quantumnondemolition protocol for the detection of the spin-rovibronic state of a single trapped cold molecular ion co-trapped with an atomic ion. They show that monitoring the motion of Ca <jats:sup>+</jats:sup> after coherent motional excitation of the Ca <jats:sup>+</jats:sup> -N <jats:sub>2</jats:sub> <jats:sup>+</jats:sup> string makes it possible to detect the N <jats:sub>2</jats:sub> <jats:sup>+</jats:sup> state without destroying either the molecule or the state itself. The procedure can be repeated multiple times while preserving the high readout fidelity. </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="6483" page="1213" related-article-type="in-this-issue" vol="367" xlink:href="10.1126/science.aaz9837">1213</jats:related-article> </jats:p>

<jats:title>Looking for a crystalline 2D spin ice</jats:title> <jats:p> Spin ices—materials in which local magnetic spins respect “ice rules” similar to those in water ice—are typically three-dimensional. Two-dimensional (2D) ice rules can also be formulated and have been found to be satisfied in engineered nanomagnetic systems, usually referred to as artificial spin ices. Zhao <jats:italic>et al.</jats:italic> used neutron scattering and thermodynamic measurements to study a crystalline candidate for a 2D spin ice, the intermetallic compound HoAgGe. They found that at low temperatures, the local spins on the distorted kagome planes of this quasi-2D material respect 2D ice rules. Increasing the temperature led to a series of transitions consistent with theoretical expectations. </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="6483" page="1218" related-article-type="in-this-issue" vol="367" xlink:href="10.1126/science.aaw1666">1218</jats:related-article> </jats:p>