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Editorial | |
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Heisenberg's uncertain legacy p1143 doi:10.1038/nphys4330 |
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Thesis | |
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Energy transitions p1144 Mark Buchanan doi:10.1038/nphys4329 |
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Books and Arts | |
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Portraits of physicists pp1145 - 1146 Marco Bentivenga, Richard Brierley & Nina Meinzer doi:10.1038/nphys4324 |
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Research Highlights | |
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Flocking: Cloud of bugs p1147 Federico Levi doi:10.1038/nphys4332 |
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Condensed-matter physics: Weyl metamaterials p1147 David Abergel doi:10.1038/nphys4333 |
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Ice nucleation: Rain before six p1147 Andreas H. Trabesinger doi:10.1038/nphys4334 |
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Quantum spin liquids: To be or not to be p1147 Yun Li doi:10.1038/nphys4335 |
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Biomaterials: Spidey sense p1147 Abigail Klopper doi:10.1038/nphys4336 |
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News and Views | |
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Letters | |
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Classical boson sampling algorithms with superior performance to near-term experiments pp1153 - 1157 Alex Neville, Chris Sparrow, Raphaël Clifford, Eric Johnston, Patrick M. Birchall et al. doi:10.1038/nphys4270 A classical algorithm solves the boson sampling problem for 30 bosons with standard computing hardware, suggesting that a much larger experimental effort will be needed to reach a regime where quantum hardware outperforms classical methods. |
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Efficient tomography of a quantum many-body system pp1158 - 1162 B. P. Lanyon, C. Maier, M. Holzäpfel, T. Baumgratz, C. Hempel et al. doi:10.1038/nphys4244 Traditionally quantum state tomography is used to characterize a quantum state, but it becomes exponentially hard with the system size. An alternative technique, matrix product state tomography, is shown to work well in practical situations. |
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Faithful conversion of propagating quantum information to mechanical motion pp1163 - 1167 A. P. Reed, K. H. Mayer, J. D. Teufel, L. D. Burkhart, W. Pfaff et al. doi:10.1038/nphys4251 Combining micrometre-sized mechanical resonators with superconducting quantum circuits, quantum information encoded with photons now can be converted to the motion of a macroscopic object. |
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Berry phase and anomalous transport of the composite fermions at the half-filled Landau level pp1168 - 1172 W. Pan, W. Kang, K. W. Baldwin, K. W. West, L. N. Pfeiffer et al. doi:10.1038/nphys4231 Experimental signatures of a Berry phase for composite fermions in the fractional quantum Hall effect provide support for the predictions that these composite fermions are Dirac particles. |
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Molecules cooled below the Doppler limit pp1173 - 1176 S. Truppe, H. J. Williams, M. Hambach, L. Caldwell, N. J. Fitch et al. doi:10.1038/nphys4241 Magneto-optical trapping and sub-Doppler cooling of atoms has been instrumental for research in ultracold atomic physics. This regime has now been reached for a molecular species, CaF. |
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Current-phase relations of few-mode InAs nanowire Josephson junctions pp1177 - 1181 Eric M. Spanton, Mingtang Deng, Saulius Vaitiekenas, Peter Krogstrup, Jesper Nygård et al. doi:10.1038/nphys4224 Semiconductor nanowires with superconducting leads are considered promising for quantum computation. The current-phase relation is systematically explored in gate-tunable InAs Josephson junctions, and is shown to provide a clean handle for characterizing the transport properties of these structures. |
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Superballistic flow of viscous electron fluid through graphene constrictions pp1182 - 1185 R. Krishna Kumar, D. A. Bandurin, F. M. D. Pellegrino, Y. Cao, A. Principi et al. doi:10.1038/nphys4240 Graphene systems are clean platforms for studying electron-electron (e-e) collisions. Electron transport in graphene constrictions is now found to behave anomalously due to e-e interactions: conductance values exceed the maximum free-electron value. |
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Instability in dynamic fracture and the failure of the classical theory of cracks pp1186 - 1190 Chih-Hung Chen, Eran Bouchbinder & Alain Karma doi:10.1038/nphys4237 Understanding crack formation is important for improving the mechanical performance of materials. A new theory is now presented for the description of cracks propagating at high speeds, with elastic nonlinearity as the underlying principle. |
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npj Microgravity is a new open access journal specifically dedicated to publishing research which enables space exploration and research that is enabled by spaceflight and ground-based spaceflight analogues. npj Microgravity is published in cooperation the Biodesign Institute at Arizona State University, and is part of the Nature Partner Journals series. Find out more >>> | | | |
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Articles | |
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Determining the quantum expectation value by measuring a single photon pp1191 - 1194 Fabrizio Piacentini, Alessio Avella, Enrico Rebufello, Rudi Lussana, Federica Villa et al. doi:10.1038/nphys4223 A photonic experiment demonstrates protective measurements, a type of weak measurements. These make it possible to determine the expectation value of the polarization of a photon from a single measurement. |
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Four-body ring-exchange interactions and anyonic statistics within a minimal toric-code Hamiltonian pp1195 - 1200 Han-Ning Dai, Bing Yang, Andreas Reingruber, Hui Sun, Xiao-Fan Xu et al. doi:10.1038/nphys4243 Ring-exchange interactions are basic elements needed for realizing topological quantum computation. These interactions and anyonic statistics have been engineered using ultracold atoms in an optical lattice. |
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Influence of apical oxygen on the extent of in-plane exchange interaction in cuprate superconductors pp1201 - 1206 Y. Y. Peng, G. Dellea, M. Minola, M. Conni, A. Amorese et al. doi:10.1038/nphys4248 A detailed resonant inelastic X-ray scattering (RIXS) study of a series of well-known cuprate superconductors reveals a correlation between the number of apical oxygens in these systems, and the strength of their in-plane exchange interaction. |
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Electron-hole collision limited transport in charge-neutral bilayer graphene pp1207 - 1214 Youngwoo Nam, Dong-Keun Ki, David Soler-Delgado & Alberto F. Morpurgo doi:10.1038/nphys4218 Whether ballistic transport can occur in a system is usually governed by the number of impurities, but a ballistic transport regime is seen in charge-neutral graphene that is limited not by impurities or phonons, but electron-hole collisions. |
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Spontaneous formation and dynamics of half-skyrmions in a chiral liquid-crystal film pp1215 - 1220 doi:10.1038/nphys4245 Spontaneous formation of a half-skyrmion lattice is observed in a thin-film chiral liquid crystal. The dynamics are shown to be thermally driven - presenting a platform to study the thermal fluctuations of topological defects. |
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Active tension network model suggests an exotic mechanical state realized in epithelial tissues pp1221 - 1226 doi:10.1038/nphys4219 Determining how cellular activity affects the collective properties of growing tissues is key to understanding morphogenesis. An epithelial tissue model shows how active tension can give rise to striking mechanical behaviours seen in experiments. |
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Thermonuclear reactions probed at stellar-core conditions with laser-based inertial-confinement fusion pp1227 - 1231 D. T. Casey, D. B. Sayre, C. R. Brune, V. A. Smalyuk, C. R. Weber et al. doi:10.1038/nphys4220 Nuclear reactions taking place in stars are not straightforward to study in laboratories on Earth. Now, inertial-confinement fusion implosion experiments are reported that mimic the conditions for the hydrogen-burning phase in main-sequence stars. |
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npj Quantum Materials is a new open access journal that is now open for submissions. The journal publishes broad coverage of quantum materials, their fundamental properties, fabrication and applications. Sign up for article e-alerts >>> | | | |
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Errata | |
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Erratum: Structural and quantum-state phase transitions in van der Waals layered materials p1232 Heejun Yang, Sung Wng Kim, Manish Chhowalla & Young Hee Lee doi:10.1038/nphys4315 |
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Erratum: Structural and quantum-state phase transitions in van der Waals layered materials p1232 Heejun Yang, Sung Wng Kim, Manish Chhowalla & Young Hee Lee doi:10.1038/nphys4328 |
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Measure for Measure | |
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A matter of time p1234 Helen Margolis doi:10.1038/nphys4327 |
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| | | | | | 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 | | | | | | |
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