Subscribe: Nature Physics - AOP - nature.com science feeds
http://www.nature.com/nphys/journal/vaop/ncurrent/rss.rdf
Added By: Feedage Forager Feedage Grade B rated
Language: English
Tags:
dynamics  effect  gravitational wave  high  light  physics  quantum hall  quantum  single  state  states  study  system  topological 
Rate this Feed
Rate this feedRate this feedRate this feedRate this feedRate this feed
Rate this feed 1 starRate this feed 2 starRate this feed 3 starRate this feed 4 starRate this feed 5 star

Comments (0)

Feed Details and Statistics Feed Statistics
Preview: Nature Physics - AOP - nature.com science feeds

Nature Physics



Nature Physics is a unique forum for physicists of all disciplines. Every month Nature Physics publishes original top-quality research, plus a compelling mix of news and reviews, in print and online.



 



Van der waals heterostructures: Exciting double bilayers

2017-05-22

An excitonic Bose–Einstein condensate has so far been realized only in particular semiconductor heterostructure setups. Now, experiments show that such condensates can form in double graphene bilayers separated by hexagonal boron nitride.



Quantum simulation: Probing information scrambling

2017-05-22

Quantum information encoded in one of many interacting particles quickly becomes scrambled. A set of tools for tracking this process is on its way.



Gravitational-wave detection: Entanglement at work

2017-05-15

The Einstein–Podolsky–Rosen type of quantum entanglement can be used to improve the sensitivity of laser interferometer gravitational-wave detectors beyond the quantum limit.



Topological photonics: Come to light

2017-05-08

Topological concepts have been demonstrated in microwave photonic systems but laser-written waveguides show the way to topological physics for light at optical frequencies.



High-harmonic generation: The bright side of downsizing

2017-05-08

The shorter the antenna, the higher the frequency — so what happens when nanoantennas hit optical frequencies? One answer may lead to high-harmonic generation without the need for high-powered lasers.



Particle physics: Alice in strangeland

2017-05-01

An enhanced production of particles with strange quarks has been observed in high-multiplicity proton–proton collisions — an important clue to understand how strange quarks form, and perhaps a hint of the quark–gluon plasma.



Axion searches: Exciting times

2017-05-01

While axions remain elusive, the CERN Axion Solar Telescope has now reached the interesting region where physics beyond the standard model could be glimpsed.



Cell mechanics: The benefits of getting high

2017-05-01

Standard rheology tells us how a cell responds to deformation. But ramping up the frequency reveals more about its internal dynamics and morphology, mapping a route to improved drug treatments — and possible insight into the malignancy of cancers.



Quantum simulation: Solid-state platforms

2017-04-24

Solid-state systems capable of simulating the theoretical predictions of condensed matter are in short supply. Demonstrations of electronic Lieb lattices using two different platforms suggest this may be about to change.



Superconductivity: Ferroelectricity woos pairing

2017-04-17

Ferroelectricity and superconductivity do not have much in common. Now, a superconducting and a ferroelectric-like state have been found to coexist in a doped perovskite oxide.



Biomolecular switches: Driven to peak

2017-03-27

A curious peak in the distribution describing stochastic switching in bacterial motility had researchers confounded. But a careful study performed under varying mechanical conditions has now revealed that the breaking of detailed balance is to blame.



Cold molecular collisions: Same object, different symmetry

2016-10-17

Cold collisions between hydrogen molecules and helium atoms reveal how the change from spherical to non-spherical symmetry creates a quantum scattering resonance.



Quantum measurement: Coping with pressure

2016-04-25

Radiation pressure noise from squeezed light constrains the precision of sensing devices such as improved gravitational wave interferometers.



Magnetic adatoms: When Ising meets Majorana

2016-04-18

The topological degeneracy associated with Majorana edge states has been measured in a spin-1/2 chain of cobalt atoms, thereby opening new avenues in low-dimensional quantum magnetism.



Excitonic superfluid phase in double bilayer graphene

2017-05-22

Strongly interacting bosons have been predicted to display a transition into a superfluid ground state, similar to Bose–Einstein condensation. This effect is now observed in a double bilayer graphene structure, with excitons as the bosonic particles.



Quantum Hall drag of exciton condensate in graphene

2017-05-22

An electronic double layer, subjected to a high magnetic field, can form an exciton condensate: a Bose–Einstein condensate of Coulomb-bound electron–hole pairs. Now, exciton condensation is reported for a graphene/boron-nitride/graphene structure.



Attosecond chronoscopy of electron scattering in dielectric nanoparticles

2017-05-22

Attosecond streaking is used to study the dynamics of electron scattering in dielectric nanoparticles in real time. Revealing the mechanisms involved is the first step towards understanding electron scattering in more complex dielectrics.



Testing universality of Efimov physics across broad and narrow Feshbach resonances

2017-05-15

The emergence of Efimov states in ultracold atomic systems is expected to have a universal behaviour, but a new experimental study defies this expectation, reporting a clear deviation around a narrow Feshbach resonance.



Hotspot-mediated non-dissipative and ultrafast plasmon passage

2017-05-15

Strong plasmonic hotspots can facilitate ultrafast energy transfer between metallic nanoparticles with almost no energy loss.



Multidimensional entropy landscape of quantum criticality

2017-05-08

Thermal-expansion measurements of CeCu6−xAux reveal the thermodynamic landscape of this material’s entropy, offering insights into the behaviour of quantum critical fluctuations as the system approaches its quantum critical point.



Topological triplon modes and bound states in a Shastry–Sutherland magnet

2017-05-08

A detailed experimental investigation on the spin excitations in SrCu2(BO3)2 under an external magnetic confirms the existence of topological triplon modes in this experimental realization of the Shastry–Sutherland model.



Tunnelling spectroscopy of Andreev states in graphene

2017-05-01

Van der Waals heterostructures provide a tunable platform for probing the Andreev bound states responsible for proximity-induced superconductivity, helping to establish a connection between Andreev physics at finite energy and the Josephson effect.



High-frequency microrheology reveals cytoskeleton dynamics in living cells

2017-05-01

Microrheology of cells suggests that the dynamics of single filaments in the cytoskeleton dominate at high frequencies. This response can be used to detect differences between cell types and states — including benign and malignant cancer cells.



Enhanced production of multi-strange hadrons in high-multiplicity proton–proton collisions

2017-04-24

Quark–gluon plasma is an exotic state of matter that can emerge in heavy nuclei high-energy collisions. The ALICE collaboration reports the first observation of strangeness enhancement in proton–proton collisions, a possible signature of this state.



Experimental realization and characterization of an electronic Lieb lattice

2017-04-24

Individual carbon monoxide molecules on a copper surface can be manipulated with scanning tunnelling microscopy to realize an electronic Lieb lattice.



A ferroelectric quantum phase transition inside the superconducting dome of Sr1−xCaxTiO3−δ

2017-04-17

Slight changes in SrTiO’s nominal composition make it superconducting or ferroelectric. A compositional window for which the two phases exist is now reported; varying the fraction of Ca replacing Sr changes the superconducting critical temperature.



Edge conduction in monolayer WTe2

2017-04-10

Experiments showing that a single layer of WTe2 can conduct electricity along its edges while insulating in the interior suggests that this material is a two-dimensional topological insulator.



Subatomic-scale force vector mapping above a Ge(001) dimer using bimodal atomic force microscopy

2017-04-10

Measuring vector quantities in nanoscale systems is challenging — often only scalar magnitudes can be experimentally obtained. Now, a multi-frequency atomic force microscopy method for probing the 3D force response of a Ge(001) surface is reported.



Light-induced electron localization in a quantum Hall system

2017-04-03

Picosecond pulses of terahertz radiation induce non-equilibrium electron dynamics in a GaAs quantum Hall system, suppressing the longitudinal resistivity, and giving rise to a quantized transverse component.



Plasmon-enhanced high-harmonic generation from silicon

2017-04-03

High-harmonic emission from crystalline silicon can be made ten times brighter by exploiting local plasmonic fields in arrays of nano-antennas.



Topological states in engineered atomic lattices

2017-03-27

Individual vacancies in a chlorine monolayer on copper can be manipulated with scanning tunnelling microscopy to engineer artificial lattices that have topologically nontrivial electronic states.



Higgs mode and its decay in a two-dimensional antiferromagnet

2017-03-27

An inelastic neutron scattering study of the two-dimensional antiferromagnet Ca2RuO4 reveals evidence for a condensed-matter analogue of the Higgs mode, and its subsequent decay into transverse Goldstone modes.



Para-hydrogen raser delivers sub-millihertz resolution in nuclear magnetic resonance

2017-03-27

A method for narrowing the NMR linewidth of specific molecules to the sub-millihertz range—two orders of magnitude below the natural linewidth—could open up new avenues for molecular characterization.



Signatures of interaction-induced helical gaps in nanowire quantum point contacts

2017-03-20

Signatures of spin–momentum-locked gap states in nanowire quantum point contacts that have all-electrical origin could provide the conditions for the quasiparticle excitations required for topological quantum computing.



Waveform measurement of charge- and spin-density wavepackets in a chiral Tomonaga–Luttinger liquid

2017-03-13

The spatial separation of charge and spin densities in one-dimensional electron systems is the hallmark of Tomonaga–Luttinger physics. Waveform measurements now provide direct evidence for spin–charge separation.



Entanglement area law in superfluid 4He

2017-03-13

When the entropy of a system scales as a function of its surface area, rather than its volume, it is said to obey an entropy area law. Now, an area law is shown to exist numerically in the entanglement entropy of superfluid helium.



Experimental quantum Hamiltonian learning

2017-03-13

With the help of a quantum simulator and Bayesian inference it is possible to determine the unknown Hamiltonian of a quantum system. An experiment demonstrates this using a photonic quantum simulator and a solid-state system.



Contactless nonlinear optics mediated by long-range Rydberg interactions

2017-03-06

Single photons stored in the collective Rydberg excitations of two atomic ensembles can interact with each other despite being micrometres apart.



Bulk rectification effect in a polar semiconductor

2017-03-06

Electrical rectification is usually achieved by layering p-type and n-type materials, but experiments now demonstrate rectification in a bulk polar semiconductor that has inversion-symmetry breaking and strong Rashba spin–orbit coupling.



Signatures of two-photon pulses from a quantum two-level system

2017-02-27

An excited two-level system emits a single photon, but in special circumstances it can emit two. The reason for this unexpected two-photon emission lies with modified Rabi oscillations.



Weak-value amplification of the nonlinear effect of a single photon

2017-02-27

Using two entangled optical beams and post-selection, a single photon can have the same effect as eight photons in terms of the induced phase shift. This example illustrates the power of the so-called weak-value amplification.



Experimental measurement of the Berry curvature from anomalous transport

2017-02-27

The Berry curvature is essential to the study of the topological properties of a system, be it solid-state, atomic or photonic. In 1D photonic lattices there is a new clever way of measuring the Berry curvature.



Collisionless momentum transfer in space and astrophysical explosions

2017-02-20

Larmor coupling is a collisionless momentum exchange mechanism believed to occur in various astrophysical and space-plasma environments. The phenomenon is now observed in a laboratory experiment.



Measuring out-of-time-order correlations and multiple quantum spectra in a trapped-ion quantum magnet

2017-05-22

Characterizing the correlations of quantum many-body systems is known to be hard, but there are ways around: for example, a new method for measuring out-of-time correlations demonstrated in a Penning trap quantum simulator with over 100 ions.



Proposal for gravitational-wave detection beyond the standard quantum limit through EPR entanglement

2017-05-15

Quantum metrology can enhance gravitational-wave detection through the use of squeezed states. A new proposal now suggests that with EPR entanglement one can do even better, reaching sensitivities beyond the standard quantum limit.



A dissipative quantum reservoir for microwave light using a mechanical oscillator

2017-05-15

A microwave cavity optomechanics experiment investigates the interplay between the electromagnetic and mechanical modes and how their roles can be reversed in engineered dissipation.



Mottness at finite doping and charge instabilities in cuprates

2017-05-08

The electron dynamics of single-layer Bi2Sr2−xLaxCuO6+δ is studied as a function of doping, revealing the evolution of charge-transfer excitations from incoherent and localized (as in a Mott insulator) to coherent and delocalized (as in a conventional metal).



Quasiparticle interference and strong electron–mode coupling in the quasi-one-dimensional bands of Sr2RuO4

2017-05-08

The normal state of the ruthenate Sr2RuO4 is not that of a conventional metal but one with enhanced correlation effects, which may help to elucidate the origin of the unconventional superconductivity observed in this material.



New CAST limit on the axion–photon interaction

2017-05-01

Axions are hypothetical light particles that could explain the dark matter. They could be produced in the interior of the Sun and the CERN Axion Solar Telescope sets the best limit on how strongly axions can interact with light.



Mixed electrochemical–ferroelectric states in nanoscale ferroelectrics

2017-05-01

Nanoscale ferroelectricity is hard to characterize. Studies of BaTiO3 thin films now reveal a close coupling between the ferroelectric and the surface electrochemical states — a notion important for future applications of ferroelectric nanomaterials.



Exploring the ferromagnetic behaviour of a repulsive Fermi gas through spin dynamics

2017-04-24

Can short-range repulsion alone bring a system into the ferromagnetic phase? The question is explored by investigating the spin dynamics in a resonantly interacting ultracold Fermi gas, and a Stoner-like ferromagnetic instability is observed.



Möbius Kondo insulators

2017-04-10

A family of topologically protected Kondo insulators, termed Möbius Kondo insulators, is predicted. A re-analysis of archival resistivity measurements of Ce3Bi4Pt3 and CeNiSn suggests they may be good candidate members of this class.



Controlled state-to-state atom-exchange reaction in an ultracold atom–dimer mixture

2017-04-10

Products from ultracold atom–dimer exothermic reactions can be directly observed by controlling the energy released during the process, bringing the study of chemical dynamics to the quantum level.



Inducing superconducting correlation in quantum Hall edge states

2017-04-03

A superconductor–graphene junction is shown to exhibit the quantum Hall effect, with the chemical potential of the edge state displaying a sign reversal. Such a system could provide a platform for observing isolated non-Abelian anyonic zero modes.



Non-equilibrium effect in the allosteric regulation of the bacterial flagellar switch

2017-03-27

Flagellated bacteria move by alternately rotating their flagella clockwise and counterclockwise with dynamics that are shown here to be torque dependent. This non-equilibrium effect increases motor sensitivity as the torque increases.



Electron–hole exchange blockade and memory-less recombination in photoexcited films of colloidal quantum dots

2017-03-20

Understanding the recombination dynamics in quantum dots is crucial for their use in optoelectronic devices. A photocurrent spectroscopy study shows how two distinct relaxation mechanisms are at play over different timescales.



Experimental observation of optical Weyl points and Fermi arc-like surface states

2017-03-20

Three-dimensional laser-written waveguide arrays are used to demonstrate type-II Weyl points, along with Fermi arc-like surface states, for light at optical wavelengths.



Orthogonal magnetization and symmetry breaking in pyrochlore iridate Eu2Ir2O7

2017-02-27

A torque magnetometry study of the pyrochlore iridate Eu2Ir2O7 reveals an unusual symmetry-breaking effect that persists above the Néel temperature of this antiferromagnet.



Ultrafast terahertz control of extreme tunnel currents through single atoms on a silicon surface

2017-02-20

Controlling electric currents on the atomic scale requires being able to handle the ultrafast timescales involved. Now, experiments have demonstrated the feasibility of terahertz scanning tunnelling microscopy as a method for doing just that.