Read our kids news articles on science. Meet Ozmo, The Environmentally-Friendly Window Cleaning Robot. The exponential growth in skyscrapers worldwide, most of which feature large glass panes to highlight the breathtaking views, has led to a high demand for window washers. Authors of primary research articles are encouraged to submit their work to a subject-appropriate journal, rather than to Earth-Science Reviews. Earth Science Reviews offers authors the rare opportunity to explore a particular subject without any limitation on the number of words used. We encourage authors to adopt a writing style which.
The Institute of Physics (IOP) is a leading scientific society promoting physics and bringing physicists together for the benefit of all. It has a worldwide membership of around 50 000 comprising physicists from all sectors, as well as those with an interest in physics. It works to advance physics research, application and education; and engages with policy makers and the public to develop awareness and understanding of physics. Its publishing company, IOP Publishing, is a world leader in professional scientific communications. Authors are encouraged to submit a general scientific summary to accompany their work.
The purpose of this additional feature is to increase theaccessibility of articles in New Journal of Physics (NJP) to a broad, non-specialist readership, and to raise the overall visibility and understandingof the journal's content.We hope that this additional content will provide another valuable resource for NJP's many users worldwide. Author guidelinesThe aim of the general scientific summary in NJP is for an author to explain to a general reader (with an assumed graduate physics background) why theirresearch was done and why the results are important. It is therefore a crucial requirement for the summary to be written in terms that are understandable toreaders outside of the immediate field of the article. Summaries that do not meet these criteria will not be published. We investigate finite-size scaling of genuine multisiteentanglement in the ground state of quantum spin-1/2 Heisenbergladders. We obtain the ground states of odd- and even-leggedHeisenberg ladder Hamiltonians and compute genuine multisiteentanglement, the generalized geometric measure (GGM), which showsthat for even rungs, GGM increases for odd-legged ladder while itdecreases for even ones.
Interestingly, the ground state obtainedby short-range dimer coverings, under the resonating valence bondansatz, encapsulates the qualitative features of GGM for both theladders. We find that while the quantity converges to a singlevalue for higher legged odd- and even-ladders, in the asymptoticlimit of a large number of rungs, the finite-size scaling exponentsof the same tend to diverge. The scaling exponent of GGM istherefore capable to distinguish the odd–even dichotomy inHeisenberg ladders, even when the corresponding multisiteentanglements merge. Thresholds of stimulated Brillouin scattering (SBS) insolid-state whispering gallery mode (WGM) microresonators areanalyzed. It is shown that the SBS interaction is substantiallydifferent here from that known in the bulk case and in the case ofwater droplet resonators. The reason is the absence of purelongitudinal acoustic WGMs owing to strong coupling of thelongitudinal (l) and transverse (t) acoustic displacements at the surface of the resonator.As a result, a considerable increase of the SBS thresholds takesplace, and the lowest thresholds correspond to the hybridtl-modes with very large radial indices.
Nevertheless, thethresholds lie in theμW range of the pump power. Dependence of the SBS powerthresholds on the modal numbers and the possibility of self-tuningto the SBS resonance are analyzed. At optical frequencies metals behave as an electron plasma andconventional antenna designs need modifications when transferred tothis regime. In contrast to antenna theory and to the effectivewavelength picture, the position and width of the dipolar resonanceof a rectangular cuboidal plasmonic nanoantenna scales nonlinearlywith its length, width and height, as shown in this paper directlyby analytical formulae. Moreover we show that the quality factorcalculated for different sizes varies significantly with size, incontrast to the quasi-static approximation which predictsinvariance. We present analytical expressions that provide a toolfor direct and precise calculation of the dipolar plasmon resonancewhich can be applied to the antenna design process.
Theseexpressions enable both physical insight and the quick explorationof a wide range of parameters to tailor the plasmon resonanceresponse or scattering by nanoparticles, for either metals ordielectrics, for numerous promising applications in optical sensor,photovoltaic and light emitting device design. We introduce a quantum phase space representation for theorientation state of extended quantum objects, using the Eulerangles and their conjugate momenta as phase space coordinates. Itexhibits the same properties as the standard Wigner function andthus provides an intuitive framework for discussing quantum effectsand semiclassical approximations in the rotational motion.
Examplesillustrating the viability of this quasi-probability distributioninclude the phase space description of a molecular alignmenteffect.