Nature Physics September Issue

If you are unable to see the message below, click here to view.

TABLE OF CONTENTS September 2015 Volume 11, Issue 9 Editorial Commentary Correction Thesis Books and Arts Research Highlights News and Views Progress Article Letters Articles Futures Subscribe   Facebook   RSS   Recommend to library   Twitter   Advertisement Nature Energy: Call for Papers Launching in January 2016, Nature Energy is now open for submissions and inviting high-quality research from across the natural and social sciences. The journal will be dedicated to exploring all aspects of the on-going discussion of energy provision; from the generation and storage of energy, to its distribution and management, the needs and demands of the different actors, and the impacts that energy technologies and policies have on societies. Submit your next research paper to the journal.     Editorial Top After a Weyl   p697 doi:10.1038/nphys3481 Like London buses, you wait for a Weyl then a few come along at once. Commentary Top It's been a Weyl coming   pp698 - 699 B. Andrei Bernevig doi:10.1038/nphys3454 Condensed-matter physics brings us quasiparticles that behave like massless fermions. See also: Letter by Yang et al. | Letter by Lv et al. | Article by Xu et al. Correction Top Correction   p699 doi:10.1038/nphys3479 Thesis Top Earthly powers   p700 Mark Buchanan doi:10.1038/nphys3466 Books and Arts Top Film: Still procrastinating   pp701 - 702 Iulia Georgescu doi:10.1038/nphys3463 Humanity divided   p702 Liesbeth Venema reviews Roboteer by Alex Lamb doi:10.1038/nphys3462 Research Highlights Top Precision measurements: Symmetry unchallenged | Quasicrystals: Relaxing defects | Superconductivity: The pressure to succeed | Active colloids: Made to order | Topological photonics: Go Weyl'd News and Views Top High-energy physics: From generation to generation   pp705 - 706 Robert Kowalewski doi:10.1038/nphys3464 A new measurement from the LHCb experiment at CERN's Large Hadron Collider impinges on a puzzle that has been troubling physicists for decades — namely the breaking of the symmetry between matter and antimatter. See also: Article by Aaij et al. Ultracold atoms: How hot is the coldest matter?   pp706 - 707 Martin Zwierlein doi:10.1038/nphys3467 A thermometer for atomic Bose-Einstein condensates and a new way of cooling below the critical temperature will help the exploration of the coldest states of matter. See also: Letter by Olf et al. Ultrafast spintronics: Back to basics   pp707 - 708 Hiroto Adachi doi:10.1038/nphys3428 A model describing spin-dependent conduction in metals underpins modern magnetic technologies. Magnetotransport under the fundamental conditions of this model has now been probed experimentally. See also: Article by Jin et al. Granular matter: Charges dropped   pp709 - 710 Frank Spahn and Martin Seiβ doi:10.1038/nphys3417 Granular charging can create some spectacular interactions, but gravity obscures our ability to observe and understand them. A neat desktop experiment circumvents this problem, shining a light on granular clustering — and perhaps even planet formation. See also: Letter by Lee et al. Ten years of Nature Physics: Frozen motion   pp710 - 711 Ania Bleszynski Jayich doi:10.1038/nphys3446 Cooling the motion of mechanical resonators to the ground state and subsequent advances in cavity optomechanics have been made possible by resolved-sideband cooling — an atomic-physics-inspired technique — first demonstrated in a 2008 Nature Physics paper. Physics JOBS of the week Associate / Full Professor of Physics and Director of Louisiana Accelerator Center University of Louisiana at Lafayette Assistant Professor in Theoretical / Computational Chemistry University of California, Santa Cruz Tier II Canada Research Chair in Experimental Condensed Matter University of British Columbia (UBC) 1 Postdoctoral Research Fellow in Quantum Phenomena in Metamaterials Centre for Disruptive Photonic Technologies Professor or Assistant Professor (Tenure Track) of Theoretical Molecular Quantum Dynamics ETH Zurich More Science jobs from Physics EVENT International Symposium on Physics and Applications of Laser Dynamics (IS-PALD) 4th Nov - 6th Nov 2015 Metz, France More science events from Progress Article Top Hybrid discrete- and continuous-variable quantum information   pp713 - 719 Ulrik L. Andersen, Jonas S. Neergaard-Nielsen, Peter van Loock and Akira Furusawa doi:10.1038/nphys3410 The traditional approaches to quantum information processing using either discrete or continuous variables can be combined in hybrid protocols for tasks including quantum teleportation, computation, entanglement distillation or Bell tests. Letters Top Thermometry and cooling of a Bose gas to 0.02 times the condensation temperature   pp720 - 723 Ryan Olf, Fang Fang, G. Edward Marti, Andrew MacRae and Dan M. Stamper-Kurn doi:10.1038/nphys3408 Despite the very low temperatures quantum gases are cooled to, the entropy per particle remains larger than that of the condensed-matter systems they are supposed to emulate. Using magnons one can produce low-temperature, low-entropy gases. See also: News and Views by Zwierlein Observation of Weyl nodes in TaAs   pp724 - 727 B. Q. Lv, N. Xu, H. M. Weng, J. Z. Ma, P. Richard et al. doi:10.1038/nphys3426 Experiments show that TaAs is a three-dimensional topological Weyl semimetal. See also: Commentary by Bernevig | Letter by Yang et al. | Article by Xu et al. Weyl semimetal phase in the non-centrosymmetric compound TaAs   pp728 - 732 L. X. Yang, Z. K. Liu, Y. Sun, H. Peng, H. F. Yang et al. doi:10.1038/nphys3425 Experiments show that TaAs is a three-dimensional topological Weyl semimetal. See also: Commentary by Bernevig | Letter by Lv et al. | Article by Xu et al. Direct observation of particle interactions and clustering in charged granular streams   pp733 - 737 Victor Lee, Scott R. Waitukaitis, Marc Z. Miskin and Heinrich M. Jaeger doi:10.1038/nphys3396 By eliminating the effects of gravity with a free-falling camera, high-resolution imaging of charged grains reveals Keplerian orbits and electrostatically stable clusters—with implications for astrophysical and industrial cluster formation. See also: News and Views by Spahn & Seiβ Single-atom imaging of fermions in a quantum-gas microscope   pp738 - 742 Elmar Haller, James Hudson, Andrew Kelly, Dylan A. Cotta, Bruno Peaudecerf et al. doi:10.1038/nphys3403 Imaging individual atoms in an optical lattice with single-site resolution has so far only been possible for bosonic species, but thanks to electromagnetically-induced-transparency cooling fermionic species can now also be imaged. Articles Top Determination of the quark coupling strength |Vub| using baryonic decays OPEN   pp743 - 747 The LHCb collaboration doi:10.1038/nphys3415 The accurate determination of quark mixing parameters is essential for the understanding of the Standard Model. The LHCb collaboration now reports the coupling strength of the b quark to the u quark through the measurement of a baryonic decay mode. See also: News and Views by Kowalewski Discovery of a Weyl fermion state with Fermi arcs in niobium arsenide   pp748 - 754 Su-Yang Xu, Nasser Alidoust, Ilya Belopolski, Zhujun Yuan, Guang Bian et al. doi:10.1038/nphys3437 Experiments show that niobium arsenide is a Weyl semimetal. See also: Commentary by Bernevig | Letter by Lv et al. | Letter by Yang et al. Spontaneously broken time-reversal symmetry in high-temperature superconductors   pp755 - 760 Mikael Håkansson, Tomas Löfwander and Mikael Fogelström doi:10.1038/nphys3383 The evidence for a time-reversal symmetry-breaking phase in high-temperature cuprate superconductors has been contradictory. But these observations are consistent with a theory predicting fractional vortices that form 'necklaces'. Accessing the fundamentals of magnetotransport in metals with terahertz probes   pp761 - 766 Zuanming Jin, Alexander Tkach, Frederick Casper, Victor Spetter, Hubert Grimm et al. doi:10.1038/nphys3384 Terahertz radiation is used to directly probe magnetotransport in metallic multilayers on the timescale of electron momentum scattering—the fundamental conditions of Nevill Mott’s model of spin-dependent conduction in metals. See also: News and Views by Adachi External high-quality-factor resonator tunes up nuclear magnetic resonance   pp767 - 771 Martin Suefke, Alexander Liebisch, Bernhard Blümich and Stephan Appelt doi:10.1038/nphys3382 Reducing the signal-to-noise ratio is a never-ending challenge for many types of experiments. Now, improved ratios are reported for nuclear magnetic resonance set-ups combining an external high-Q resonator and a low-Q input coil. The free-energy cost of accurate biochemical oscillations   pp772 - 778 Yuansheng Cao, Hongli Wang, Qi Ouyang and Yuhai Tu doi:10.1038/nphys3412 Cells rely on coherent oscillatory processes, despite being subject to large fluctuations from their environment. Simple motifs found in all oscillatory systems are studied to determine the thermodynamic cost of maintaining this coherence. Spectrum of controlling and observing complex networks   pp779 - 786 Gang Yan, Georgios Tsekenis, Baruch Barzel, Jean-Jacques Slotine, Yang-Yu Liu et al. doi:10.1038/nphys3422 The complex interactions inherent in real-world networks grant us precise system control via manipulation of a subset of nodes. It turns out that the extent to which we can exercise this control depends sensitively on the number of nodes perturbed. Futures Top Love and relativity   p788 Stewart C Baker doi:10.1038/nphys3483 Family connections. Top Advertisement Announcing Nature Reviews Materials Launching in January 2016, Nature Reviews Materials aims to cover the making, measuring, modelling and manufacturing of materials - thus, looking at materials science throughout the pipeline of laboratory discovery to functional device. Nature Reviews Materials will provide timely and authoritative Reviews and Perspectives, written by leading researchers in their fields.  Visit for further details.      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. Find the latest scientific conferences, courses, meetings and symposia on natureevents.com. For event advertising opportunities across the Nature Publishing Group portfolio please contact natureevents@nature.com More Nature Events

You have been sent this Table of Contents Alert because you have opted in to receive it. You can change or discontinue your e-mail alerts at any time, by modifying your preferences on your nature.com account at: www.nature.com/myaccount (You will need to log in to be recognised as a nature.com registrant) For further technical assistance, please contact our registration department For print subscription enquiries, please contact our subscription department For other enquiries, please contact our customer feedback department Nature Publishing Group | One New York Plaza, Suite 4500 | New York | NY 10004-1562 | USA Nature Publishing Group's worldwide offices: London - Paris - Munich - New Delhi - Tokyo - Melbourne San Diego - San Francisco - Washington - New York - Boston Macmillan Publishers Limited is a company incorporated in England and Wales under company number 785998 and whose registered office is located at Brunel Road, Houndmills, Basingstoke, Hampshire RG21 6XS. © 2015 Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved.