Nature Physics March Issue

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TABLE OF CONTENTS March 2015 Volume 11, Issue 3 Editorial Commentary Thesis Books and Arts Research Highlights News and Views Letters Articles Erratum Futures Subscribe   Facebook   RSS   Recommend to library   Twitter   Editorial Top Physics, physicists and the bomb   p201 doi:10.1038/nphys3287 Scientists involved in nuclear research before and after the end of the Second World War continue to be the subjects of historical and cultural fascination. Commentary Top Too cool to work   pp202 - 205 Xavier Moya, Emmanuel Defay, Volker Heine and Neil D. Mathur doi:10.1038/nphys3271 Magnetocaloric and electrocaloric effects are driven by doing work, but this work has barely been explored, even though these caloric effects are being exploited in a growing number of prototype cooling devices. Thesis Top In search of Majorana   p206 Mark Buchanan doi:10.1038/nphys3275 Books and Arts Top Out from the cold   p207 Andrea Taroni reviews Half-Life: The Divided Life of Bruno Pontecorvo, Physicist or Spy by Frank Close doi:10.1038/nphys3278 Theatre: Boys and men   pp208 - 209 Iulia Georgescu doi:10.1038/nphys3274 Exhibition: Strange bedfellows   p209 Luke Fleet doi:10.1038/nphys3276 Research Highlights Top Dwarf-galaxy giants | Long enough by far | Aligned and polarized | Strange new worlds | Phase out News and Views Top Quantum mechanics: No more fields   pp211 - 212 Maciej Lewenstein doi:10.1038/nphys3226 A self-accelerating electronic wave packet can acquire a phase akin to the Aharonov-Bohm effect, but in the absence of a magnetic field. See also: Article by Kaminer et al. Spin chains: Long-distance relationship   pp212 - 213 Chiranjib Mitra doi:10.1038/nphys3249 Photons immediately spring to mind when we talk about long-distance entanglement. But the spins at the ends of one-dimensional magnetic chains can be entangled over large distances too — providing a solid-state alternative for quantum communication protocols. See also: Article by Sahling et al. Photonic crystals: Disorder sets light straight   pp213 - 214 Jorge Bravo-Abad doi:10.1038/nphys3257 Photonic crystals can control the flow of light but they are extremely sensitive to structural disorder. Although this often degrades performance, disorder can actually be used to enhance light collimation. See also: Article by Hsieh et al. Phononic crystals: Entering an acoustic phase   pp215 - 216 Julio T. Barreiro doi:10.1038/nphys3273 Electrons moving in a one-dimensional crystal can acquire a geometrical phase. Sound waves in phononic crystals are now shown to display the same effect — underlining the similarity between conventional solids and acoustic metamaterials. See also: Letter by Xiao et al. Tunnelling in chiral water clusters: Protons in concert   pp216 - 218 Christof Drechsel-Grau and Dominik Marx doi:10.1038/nphys3269 The transfer of protons across a high barrier only occasionally occurs through quantum-mechanical tunnelling. Low-temperature scanning tunnelling microscopy shows concerted tunnelling of four protons within chiral cyclic water tetramers supported on an inert surface. See also: Letter by Meng et al. Acoustics: Stretchy string theory   p218 Bart Verberck doi:10.1038/nphys3279 Ten years of Nature Physics: Jack of all trades   pp219 - 220 Robin Côté doi:10.1038/nphys3250 Over the past decade, ultracold polar molecules have found application in hybrid quantum computation and quantum simulation, directions established in three early papers published in Nature Physics. Physics JOBS of the week Postdoc Position In Biophysics, Biopolymer Physics / Bionanotechnology Norwegian University of Science and Technology (NTNU) Post-doctoral Research Associate in Physics of 2D Materials (24 months) The University of Sheffield Postdoctoral researcher in in Theoretical Condensed Matter Physics University of Amsterdam (UvA) Post-doc in Soft Matter Physics in ENS ENS Paris PhD student position in Materials Physics Chalmers University of Technology More Science jobs from Physics EVENT Satellite Meeting: University Physics in Light of Maxwell's Equations 18th Nov - 19th Nov 2015 Newport Pagnell, United Kingdom More science events from Letters Top Quantum criticality of Mott transition in organic materials   pp221 - 224 Tetsuya Furukawa, Kazuya Miyagawa, Hiromi Taniguchi, Reizo Kato and Kazushi Kanoda doi:10.1038/nphys3235 The Mott transition is investigated in three different organic insulators with triangular lattices and evidence of quantum criticality in an intermediate temperature regime is uncovered. Dynamics and inertia of skyrmionic spin structures   pp225 - 228 Felix Büttner, C. Moutafis, M. Schneider, B. Krüger, C. M. Günther et al. doi:10.1038/nphys3234 Understanding the motion of magnetic skyrmions is essential if they are to be used as information carriers in devices. It is now shown that topological confinement endows the skyrmions with an unexpectedly large mass, which plays a key role in their dynamics. Many-body transitions in a single molecule visualized by scanning tunnelling microscopy   pp229 - 234 Fabian Schulz, Mari Ijäs, Robert Drost, Sampsa K. Hämäläinen, Ari Harju et al. doi:10.1038/nphys3212 A single-particle model is usually used to interpret the tunnelling spectra of molecules on surfaces, but scanning tunnelling microscopy now shows that many-body effects can occur in a single molecule. Direct visualization of concerted proton tunnelling in a water nanocluster   pp235 - 239 Xiangzhi Meng, Jing Guo, Jinbo Peng, Ji Chen, Zhichang Wang et al. doi:10.1038/nphys3225 Many-body tunnelling is a complex but important phenomenon. Scanning tunnelling microscopy experiments with a Cl-terminated tip on a cyclic cluster of hydrogen-bonded water molecules now demonstrate controllable concerted tunnelling of four protons. See also: News and Views by Drechsel-Grau & Marx Geometric phase and band inversion in periodic acoustic systems   pp240 - 244 Meng Xiao, Guancong Ma, Zhiyu Yang, Ping Sheng, Z. Q. Zhang et al. doi:10.1038/nphys3228 The behaviour of sound waves in phononic crystals—metamaterials with spatially varying acoustic characteristics—is similar to that of electrons in solids. Now, phononic band inversion and Zak phases have been measured for a 1D phononic system. See also: News and Views by Barreiro Evidence for dark matter in the inner Milky Way   pp245 - 248 Fabio Iocco, Miguel Pato and Gianfranco Bertone doi:10.1038/nphys3237 The rotation curve of a galaxy reflects the galactic mass distribution. For the Milky Way, such observational data are incompatible with models based on baryonic matter alone, which could be due to the presence of dark matter in the inner Milky Way. Articles Top Measurements on the reality of the wavefunction   pp249 - 254 M. Ringbauer, B. Duffus, C. Branciard, E. G. Cavalcanti, A. G. White et al. doi:10.1038/nphys3233 Whether the wavefunction corresponds to reality or represents our limited knowledge of a quantum system is still under debate. A photonic experiment provides evidence for the former. Experimental realization of long-distance entanglement between spins in antiferromagnetic quantum spin chains   pp255 - 260 S. Sahling, G. Remenyi, C. Paulsen, P. Monceau, V. Saligrama et al. doi:10.1038/nphys3186 Quantum communication relies on the ability to entangle quantum states. Experiments now show that this is possible in a bulk material, with unpaired spins at the ends of antiferromagnetic spin chains entangled over long distances. See also: News and Views by Mitra Self-accelerating Dirac particles and prolonging the lifetime of relativistic fermions   pp261 - 267 Ido Kaminer, Jonathan Nemirovsky, Mikael Rechtsman, Rivka Bekenstein and Mordechai Segev doi:10.1038/nphys3196 By engineering the electron wavefunction it is possible to create Aharonov-Bohm-like phases and relativistic effects such as length contraction and time dilation in a non-relativistic setting and in the absence of electromagnetic fields. See also: News and Views by Lewenstein Photon transport enhanced by transverse Anderson localization in disordered superlattices   pp268 - 274 P. Hsieh, C. Chung, J. F. McMillan, M. Tsai, M. Lu et al. doi:10.1038/nphys3211 Photonic-crystal waveguides can control light propagation on subwavelength scales, but structural disorder typically causes scattering and broadening. It is now shown that disorder can enhance light collimation beyond conventional limits. See also: News and Views by Bravo-Abad Non-reciprocal Brillouin scattering induced transparency   pp275 - 280 JunHwan Kim, Mark C. Kuzyk, Kewen Han, Hailin Wang and Gaurav Bahl doi:10.1038/nphys3236 By exploiting the interaction between light and phonons in a silica microsphere resonator it is possible to generate Brillouin scattering induced transparency, which is akin to electromagnetically induced transparency but for acoustic waves. Electrical control of optical emitter relaxation pathways enabled by graphene   pp281 - 287 K. J. Tielrooij, L. Orona, A. Ferrier, M. Badioli, G. Navickaite et al. doi:10.1038/nphys3204 The relaxation processes of light-emitting excited ions are tunable, but electrical control is challenging. It is now shown that graphene can be used to manipulate the optical emission and relaxation of erbium near-infrared emitters electrically. Erratum Top Erratum: A universal origin for secondary relaxations in supercooled liquids and structural glasses   p287 Jacob D. Stevenson and Peter G. Wolynes doi:10.1038/nphys3286 Futures Top The black hole and the entropy collector   p288 Alvaro Zinos-Amaro doi:10.1038/nphys3288 Hope on the horizon. Top Advertisement npj Quantum Information An online open access journal providing a platform for the latest important research on quantum information, including quantum computing, quantum communications and quantum information theory. The Journal is now open for submissions. 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