Nature Physics June Issue

Advertisement Wondering where to publish your next paper? Frontiers is a community-oriented open-access publisher and research network. We are driving innovations around peer-review and a whole ecosystem of open science tools Be a part of the future of research publication TABLE OF CONTENTS June 2013 Volume 9, Issue 6 Editorial Thesis Books and Arts Research Highlights News and Views Review Letters Articles Corrigendum Subscribe   Facebook   RSS   Recommend to library   Twitter   Advertisement Nature proudly sponsors the Imagine Science Film Awards Where science meets cinema Submit your film and compete for the $2,500 Nature Scientific Merit Award and the $1,000 Nature Audience Award www.imaginesciencefilms.org/festival/submit-your-film/   Editorial Top National science furore   p315 doi:10.1038/nphys2662 Grants awarded through peer review should not then be subject to political 'accountability'. Thesis Top What has econophysics ever done for us?   p317 Mark Buchanan doi:10.1038/nphys2648 Correction   p317 doi:10.1038/nphys2651 Books and Arts Top Perfect crime, Non-Perfect crime   p318 Iulia Georgescu reviews The Devotion of Suspect X by Keigo Higashino doi:10.1038/nphys2649 Light, the Universe and everything   p319 Reviewed by May Chiao doi:10.1038/nphys2650 Research Highlights Top Buckle up | Shear drop | Light and fire | Camera insecta obscura | Within the rules News and Views Top Organic materials: Graphene gets molecules into order   pp321 - 322 Friedrich Reinert doi:10.1038/nphys2643 Small metal-free organic molecules on an epitaxial graphene monolayer are shown to receive a local magnetic moment from the substrate. This magnetic moment survives when many molecules combine to form a layer, with some indication of long-range ferromagnetic order. See also: Article by Garnica et al. Negative refraction: Imaging through the looking-glass   pp323 - 324 Rupert F. Oulton and John B. Pendry doi:10.1038/nphys2645 A planar composite material images ultraviolet light like a lens, by unwinding its phase. The concept could aid high-resolution nanolithography. Materials science: Crack scene investigation   p324 Bart Verberck doi:10.1038/nphys2654 Artificial spin ice: The heat is on   pp324 - 325 Christopher Marrows doi:10.1038/nphys2638 Model magnetic systems known as artificial spin ices have almost always been found in frozen, athermal states. But an artificial spin ice that is designed to be thermally active has now been imaged as it explores its frustrated energy landscape. See also: Article by Farhan et al. Lasers: Amplified by randomness   pp325 - 326 Vladan Vuletic doi:10.1038/nphys2635 Usually a laser consists of a light-amplifying medium nested between two mirrors. A mirrorless laser that operates by forcing the light to take a long, random path through the gain medium has now been demonstrated. See also: Letter by Baudouin et al. Magnetic monopoles: Entropy lost   pp326 - 327 Nic Shannon doi:10.1038/nphys2611 Low-temperature experiments on spin ice indicate that entropy plateaus at a value close to that estimated for water ice — a result at odds with the third law of thermodynamics. New measurements below 500 mK are consistent with the idea that spin ice finds a way to lose this residual entropy. See also: Letter by Pomaranski et al. Physics JOBS of the week PhD in Physics University College at London Full-Time Faculty Position in Physics, Koç University Koc University PhD position in Surface Physics Cic Nanogune Research Fellow University of Warwick Postdoctoral Scientist Medical Research Council More Science jobs from Physics EVENT Physics of Emergent Behaviour: From single cells to groups of individuals 24th June 2013 Brighton, UK More science events from Review Top Quantum plasmonics   pp329 - 340 M. S. Tame, K. R. McEnery, Ş. K. Özdemir, J. Lee, S. A. Maier and M. S. Kim doi:10.1038/nphys2615 Surface-plasmon polaritons are hybrid particles that result from strong coupling between light and collective electron motion on the surface of a metal. This Review presents an overview of the quantum properties of surface plasmons, their role in controlling light-matter interactions at the quantum level and potential applications. Letters Top Ideal n-body correlations with massive particles   pp341 - 344 R. G. Dall, A. G. Manning, S. S. Hodgman, Wu RuGway, K. V. Kheruntsyan and A. G. Truscott doi:10.1038/nphys2632 Quantum coherence has been extensively investigated in quantum optics, but less is known about its properties in massive particles. The higher-order many-body correlation functions have now been measured in an atom optics experiment, validating Wick's theorem. Correlations, indistinguishability and entanglement in Hong-Ou-Mandel experiments at microwave frequencies   pp345 - 348 C. Lang, C. Eichler, L. Steffen, J. M. Fink, M. J. Woolley, A. Blais and A. Wallraff doi:10.1038/nphys2612 Two indistinguishable single photons that simultaneously enter a beam splitter will always leave together, and this Hong-Ou-Mandel effect is now observed with microwave photons for the first time. Coherence between the beam-splitter output arms is demonstrated, enabling two-mode entanglement, which is useful for quantum communication processing at microwave frequencies. Sudden reversal in the pressure dependence of Tc in the iron-based superconductor KFe2As2    pp349 - 352 F. F. Tafti, A. Juneau-Fecteau, M-È. Delage, S. René de Cotret, J-Ph. Reid, A. F. Wang, X-G. Luo, X. H.  Chen, N. Doiron-Leyraud and Louis Taillefer doi:10.1038/nphys2617 Different probes have found different superconducting pairing states in different iron-based high-temperature superconductors. Now transport measurements suggest that pressure drives the superconducting state in KFe2As2 from d-wave to s-wave. Absence of Pauling's residual entropy in thermally equilibrated Dy2Ti2O7    pp353 - 356 D. Pomaranski, L. R. Yaraskavitch, S. Meng, K. A. Ross, H. M. L. Noad, H. A. Dabkowska, B. D. Gaulin and J. B. Kycia doi:10.1038/nphys2591 Early specific-heat measurements of the archetypal spin ice Dy2Ti2O7 showed a residual entropy at low temperatures similar to that found in water ice. A technique exploiting slow thermal equilibration now reveals an absence of this entropy—calling into question the nature of Dy2Ti2O7 at low temperatures. See also: News and Views by Shannon A cold-atom random laser   pp357 - 360 Q. Baudouin, N. Mercadier, V. Guarrera, W. Guerin and R. Kaiser doi:10.1038/nphys2614 Random lasing, where light is amplified through multiple scattering in a gain medium, could occur naturally in astrophysical environments. Experimental evidence for random lasing in a cloud of cold atoms may lead to a better understanding of these astrophysical lasers. See also: News and Views by Vuletic Articles Top Quantum simulation of dynamical maps with trapped ions   pp361 - 367 P. Schindler, M. Muller, D. Nigg, J. T. Barreiro, E. A. Martinez, M. Hennrich, T. Monz, S. Diehl, P. Zoller and R. Blatt doi:10.1038/nphys2630 Dynamical maps are well known in the context of classical nonlinear dynamics and chaos theory. A trapped-ion quantum simulator can be used to study the generalized version of dynamical maps for many-body dissipative quantum systems. Long-range magnetic order in a purely organic 2D layer adsorbed on epitaxial graphene   pp368 - 374 Manuela Garnica, Daniele Stradi, Sara Barja, Fabian Calleja, Cristina Díaz, Manuel Alcamí, Nazario Martín, Amadeo L. Vázquez de Parga, Fernando Martín and Rodolfo Miranda doi:10.1038/nphys2610 Despite its impressive mechanical and electronic properties, graphene's magnetic characteristics are poor. However, adsorbed organic molecules can give the material magnetic functionality, and the magnetic moment remains when the molecules combine to form dimers or even a continuous monolayer. See also: News and Views by Reinert Exploring hyper-cubic energy landscapes in thermally active finite artificial spin-ice systems   pp375 - 382 A. Farhan, P. M. Derlet, A. Kleibert, A. Balan, R. V. Chopdekar, M. Wyss, L. Anghinolfi, F. Nolting and L. J. Heyderman doi:10.1038/nphys2613 Artificial spin-ice promises a means of probing dynamics in frustrated systems, but samples typically only shift between low-lying energy states under an external field. Exploring the energy landscape is now possible, through exquisite control over the thermal fluctuations of mesoscopic magnetic dipoles. See also: News and Views by Marrows Corrigendum Top Between order and chaos   p382 James P. Crutchfield doi:10.1038/nphys2639 Top Advertisement Choose Scientific Reports for fast, efficient, open access publishing 93% of authors said they are likely or very likely to recommend Scientific Reports to their colleagues* 92% of authors would publish in Scientific Reports again* SUBMIT your paper today! *Nature Publishing Group author survey, data correct as of April 2013   Natureevents is a fully searchable, multi-disciplinary database designed to maximise exposure for events organisers. The contents of the Natureevents Directory are now live. 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