Nature Physics August Issue

Advertisement AIMResearch - Highlighting the latest research from the WPI Advanced Institute for Materials Research, Tohoku University, Japan Latest highlights: Spintronics: Both sides polarized | Cell imaging: Switching it up Oxide materials: Hidden layers | In the spotlight: Bringing mathematics to life (roundtable interview) Register today for monthly email alerts and never miss the latest in materials research from the WPI-AIMR! TABLE OF CONTENTS August 2012 Volume 8, Issue 8 Editorial Thesis Books and Arts Research Highlights News and Views Letters Articles Corrigendum Subscribe   Facebook   RSS   Recommend to library   Twitter   Advertisement Lindau Nobel Community The Interactive home of the Lindau Meetings The 62nd Lindau Meeting of Nobel Laureates is dedicated to physics. We invite you to visit the Lindau Nobel Community site to access multilingual blogs, follow tweets about the event and view pictures from Instagram. You can watch footage by Nature Video from past and present meetings and more. Access the site online.   Editorial Top We have it   p575 doi:10.1038/nphys2404 History has been made with the discovery of a Higgs-like particle at CERN. Thesis Top Instructions for assembly   p577 Mark Buchanan doi:10.1038/nphys2393 Books and Arts Top Renaissance man reborn   pp578 - 579 Alison Wright doi:10.1038/nphys2391 Research Highlights Top Force shield | Cavity-enhanced graphene | Mean machine | Higgs out in the cold | A Hall effect for superfluids News and Views Top Graphene plasmonics: All eyes on flatland   pp581 - 582 Stefan A. Maier doi:10.1038/nphys2381 Graphene could offer an efficient and controllable interface between nanoscale optics and electronics, and promises a new generation of optoelectronic devices. Quasicrystals: Tile at random   p582 Abigail Klopper doi:10.1038/nphys2392 Cell mechanics: Wave of migration   pp583 - 584 Manuel Théry doi:10.1038/nphys2374 Cells migrate en masse to generate and renew tissue — but inadequate resolution and incompatible timescales obscure the mechanism behind this migration. A unique approach reveals that stress mediates collective motion by propagating in a wave from the leading edge to the population centre. See also: Article by Serra-Picamal et al. Dark matter: Supersymmetry wimps out?   pp584 - 586 Alexander Merle and Tommy Ohlsson doi:10.1038/nphys2382 Supersymmetric particles are prime candidates to make up the dark matter of the Universe — yet the lack of evidence for them so far from the Large Hadron Collider could force a rethink. Electron microscopy: Atomic resolution comes into phase   pp586 - 587 Peter D. Nellist doi:10.1038/nphys2357 Atomic-resolution differential phase-contrast imaging using aberration-corrected scanning transmission electron microscopy now provides a sensitive probe of the electric field associated with individual atoms. See also: Letter by Shibata et al. Physics JOBS of the week Professor in Theoretical Physics University of Mainz, Institute of Physics, Germany Postdoctoral Researcher in Physics: In Situ Catalysis Investigations Lund University, Division of Synchrotron Radiation Research Post-doctoral / Engineering position at the interface between cell biology and physics CNRS (Centre National de la Recherche Scientifique, France) Permanent positions at the Applied Physics Department University of Sao Paulo Theoretical Chemical Physics University of Edinburgh - School of Chemistry More Science jobs from Physics EVENT Topical Research Meetings on Physics: Quantum Technologies: Taking Concepts through to Implementations 17th December - 18th December 2012 London, UK More science events from Letters Top Experimental estimation of the dimension of classical and quantum systems   pp588 - 591 Martin Hendrych, Rodrigo Gallego, Michal Mičuda, Nicolas Brunner, Antonio Acin and Juan P. Torres doi:10.1038/nphys2334 Is it possible to deduce the number of dimensions of a completely unknown system only from the results of measurements performed on it? So-called dimension witnesses allow such an estimation, and are now experimentally demonstrated using pairs of entangled photons. Experimental device-independent tests of classical and quantum dimensions   pp592 - 595 Johan Ahrens, Piotr Badzig, Adán Cabello and Mohamed Bourennane doi:10.1038/nphys2333 Hilbert space is made up of a potentially infinite number of dimensions that correspond to all the parameters needed to fully define a system. The idea is seen as an important resource for quantum information processing. A technique for estimating the number of dimensions in an unknown system based on the results of measurements performed on it—a so-called dimension witness—is now experimentally demonstrated. Ultrafast entangling gates between nuclear spins using photoexcited triplet states   pp596 - 600 Vasileia Filidou, Stephanie Simmons, Steven D. Karlen, Feliciano Giustino, Harry L. Anderson and John J. L. Morton doi:10.1038/nphys2353 Nuclear spin is seen as a robust qubit. Electrons can be used to 'read' to the nuclear state, but their presence causes decoherence. Researchers now show that this problem can be circumvented using a temporary spin state, thus enabling entanglement of the nuclear state at unprecedented speeds. Density functional theory for atomic Fermi gases   pp601 - 605 Ping Nang Ma, Sebastiano Pilati, Matthias Troyer and Xi Dai doi:10.1038/nphys2348 Density functional theory provides a powerful framework for probing electronic structure in many-body systems. A new functional for particles interacting via short-range potentials extends its applicability to ultracold atoms in optical lattices. The origin and non-quasiparticle nature of Fermi arcs in Bi2Sr2CaCu2O8+δ    pp606 - 610 T. J. Reber, N. C. Plumb, Z. Sun, Y. Cao, Q. Wang, K. McElroy, H. Iwasawa, M. Arita, J. S. Wen, Z. J. Xu, G. Gu, Y. Yoshida, H. Eisaki, Y. Aiura and D. S. Dessau doi:10.1038/nphys2352 How and why Fermi arcs—disconnected segments of the Fermi surface—emerge in the pseudogap phase of cuprate superconductors is a mystery. A technique for analysing angle-resolved photoemission spectroscopy data that removes momentum broadening effects suggests these arcs do not reflect true Fermi surface states, which would explain why they do not form continuous loops. Differential phase-contrast microscopy at atomic resolution   pp611 - 615 Naoya Shibata, Scott D. Findlay, Yuji Kohno, Hidetaka Sawada, Yukihito Kondo and Yuichi Ikuhara doi:10.1038/nphys2337 A technique capable of detecting the electric field associated with individual atoms is now demonstrated. Atomic-resolution differential phase-contrast imaging using aberration-corrected scanning transmission electron microscopy provides a sensitive probe of the gradient of the electrostatic potential in a crystal lattice. See also: News and Views by Nellist Articles Top Hedgehog spin texture and Berry's phase tuning in a magnetic topological insulator   pp616 - 622 Su-Yang Xu, Madhab Neupane, Chang Liu, Duming Zhang, Anthony Richardella, L. Andrew Wray, Nasser Alidoust, Mats Leandersson, Thiagarajan Balasubramanian, Jaime S´nchez-Barriga, Oliver Rader, Gabriel Landolt, Bartosz Slomski, Jan Hugo Dil, Jürg Osterwalder, Tay-Rong Chang, Horng-Tay Jeng, Hsin Lin, Arun Bansil, Nitin Samarth and M. Zahid Hasan doi:10.1038/nphys2351 Breaking the time-reversal symmetry of the surface states of topological insulators is predicted to produce many exotic and potentially useful phenomena. Spin-resolved angle-resolved photoemission spectroscopy spectra reveal that magnetic dopants can induce such symmetry breaking in Be2Se3 thin films. A wideband, low-noise superconducting amplifier with high dynamic range   pp623 - 627 Byeong Ho Eom, Peter K. Day, Henry G. LeDuc and Jonas Zmuidzinas doi:10.1038/nphys2356 An ideal amplifier has low noise, operates over a broad frequency range and has large dynamic range. A superconducting-resonator-based amplifier that combines all of these qualities is now demonstrated. The concept is applicable throughout the microwave, millimetre-wave and submillimetre-wave bands and can achieve a noise limit very close to that set by quantum mechanics. Mechanical waves during tissue expansion   pp628 - 634 Xavier Serra-Picamal, Vito Conte, Romaric Vincent, Ester Anon, Dhananjay T. Tambe, Elsa Bazellieres, James P. Butler, Jeffrey J. Fredberg and Xavier Trepat doi:10.1038/nphys2355 Tissue growth and regrowth rely on the collective migration of sheets of cells. Gradients in tension established through intercellular forces guide this migration, but the mechanism driving the gradients has remained unclear. Innovative experiments now reveal their origin—in a mechanical wave set up by sequential cell reinforcement and fluidization. See also: News and Views by Thery Corrigendum Top Experimental demonstration of a universally valid error-disturbance uncertainty relation in spin measurements   p634 Jacqueline Erhart, Stephan Sponar, Georg Sulyok, Gerald Badurek, Masanao Ozawa and Yuji Hasegawa doi:10.1038/nphys2398 Top Advertisement Nature Communications #4 in multidisciplinary sciences with first Impact Factor Nature Communications has joined Nature at the top of the multidisciplinary sciences category with its first impact factor of 7.396* Launched in April 2010, Nature Communications is a multidisciplinary online-only journal publishing high quality research across the natural sciences. *2011 Journal Citation Reports® (Thomson Reuters, 2012)   Natureevents is a fully searchable, multi-disciplinary database designed to maximise exposure for events organisers. The contents of the Natureevents Directory are now live. The digital version is available here. 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