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Nature Physics offers a unique mix of news and reviews alongside top-quality research papers. Published monthly, in print and online, the journal reflects the entire spectrum of physics, pure and applied.
Ενημερώθηκε: πριν από 1 ώρα 3 λεπτά

e is everywhere

Τρί, 03/09/2019 - 00:00

Nature Physics, Published online: 03 September 2019; doi:10.1038/s41567-019-0655-9

From determining the compound interest on borrowed money to gauging chances at the roulette wheel in Monte Carlo, Stefanie Reichert explains that there’s no way around Euler’s number.

Conditional convergence of maths and physics

Τρί, 03/09/2019 - 00:00

Nature Physics, Published online: 03 September 2019; doi:10.1038/s41567-019-0654-x

Conditional convergence of maths and physics

Photons in the periphery

Τρί, 03/09/2019 - 00:00

Nature Physics, Published online: 03 September 2019; doi:10.1038/s41567-019-0661-y

Photons in the periphery

Self-straining of actively crosslinked microtubule networks

Δευ, 02/09/2019 - 00:00

Nature Physics, Published online: 02 September 2019; doi:10.1038/s41567-019-0642-1

In a model system crosslinked by motors, cytoskeletal polymers slide past each other at speeds independent of their polarity. This behaviour is best described within an active-gel framework that deviates from the dilute limit set by existing theory.

Identification of spin, valley and moiré quasi-angular momentum of interlayer excitons

Δευ, 26/08/2019 - 00:00

Nature Physics, Published online: 26 August 2019; doi:10.1038/s41567-019-0631-4

Stacked 2D materials can host excitons with distinct valley selection rules due to the spatial variation of the moiré pattern. The authors demonstrate this via optical spectroscopy, opening a route for control of optoelectronic devices.

Quantum convolutional neural networks

Δευ, 26/08/2019 - 00:00

Nature Physics, Published online: 26 August 2019; doi:10.1038/s41567-019-0648-8

A quantum circuit-based algorithm inspired by convolutional neural networks is shown to successfully perform quantum phase recognition and devise quantum error correcting codes when applied to arbitrary input quantum states.

Giant gate-controlled proximity magnetoresistance in semiconductor-based ferromagnetic–non-magnetic bilayers

Δευ, 26/08/2019 - 00:00

Nature Physics, Published online: 26 August 2019; doi:10.1038/s41567-019-0621-6

The authors demonstrate magnetoresistance of 80% from a two-dimensional electron gas proximity coupled to a ferromagnetic layer. This extends spintronics functionality to semiconductor devices.

Photonic Weyl points due to broken time-reversal symmetry in magnetized semiconductor

Δευ, 19/08/2019 - 00:00

Nature Physics, Published online: 19 August 2019; doi:10.1038/s41567-019-0612-7

Photonic Weyl points—topologically chiral singularity points in three-dimensional momentum space—have been realized in a homogeneous non-reciprocal material without a crystal lattice structure.

Realization of density-dependent Peierls phases to engineer quantized gauge fields coupled to ultracold matter

Δευ, 19/08/2019 - 00:00

Nature Physics, Published online: 19 August 2019; doi:10.1038/s41567-019-0615-4

Non-trivial Peierls phases that depend on the site occupations for ultracold fermions in an optical lattice have been engineered in a Floquet approach, providing a fundamental ingredient for a density-dependent gauge field acting on ultracold matter.

The magic in molecules

Δευ, 19/08/2019 - 00:00

Nature Physics, Published online: 19 August 2019; doi:10.1038/s41567-019-0647-9

The demonstration of high-resolution spectroscopy of Sr2 molecules trapped in an optical lattice at the ‘magic’ wavelength opens the way to precision control of molecular excitations.

Molecular lattice clock with long vibrational coherence

Δευ, 19/08/2019 - 00:00

Nature Physics, Published online: 19 August 2019; doi:10.1038/s41567-019-0632-3

The realization of a molecular lattice clock based on vibrations in diatomic molecules is reported with coherence times lasting over tens of milliseconds, which is enabled by the use of a state-insensitive magic lattice trap.

Half-integer level shift of vortex bound states in an iron-based superconductor

Δευ, 19/08/2019 - 00:00

Nature Physics, Published online: 19 August 2019; doi:10.1038/s41567-019-0630-5

The authors use STM to show that there are two different classes of zero-bias peak in vortex cores of Fe(Te,Se). One class is topological, one not. These are distinguished by a shift in the energy levels of the excited states.

The physics of cell-size regulation across timescales

Δευ, 19/08/2019 - 00:00

Nature Physics, Published online: 19 August 2019; doi:10.1038/s41567-019-0629-y

Cell size is regulated by processes ranging from rapid fluctuations to slower growth and division. Limited dialogue between communities studying these disparate timescales has hindered our understanding of size control—a gap bridged by this Review.

Generation and acceleration of electron bunches from a plasma photocathode

Δευ, 12/08/2019 - 00:00

Nature Physics, Published online: 12 August 2019; doi:10.1038/s41567-019-0610-9

Electron bunches are generated and accelerated to relativistic velocities by tunnel ionization of neutral gas species in a plasma. This represents a step towards ultra-bright, high-emittance beams in laser-plasma accelerators.

Tissue fluidity promotes epithelial wound healing

Δευ, 12/08/2019 - 00:00

Nature Physics, Published online: 12 August 2019; doi:10.1038/s41567-019-0618-1

An observation that cells at the edge of a healing wound readily undergo intercalation leads to the finding that tissue fluidity is crucial for effective wound closure.

Vanishing carrier-envelope-phase-sensitive response in optical-field photoemission from plasmonic nanoantennas

Δευ, 12/08/2019 - 00:00

Nature Physics, Published online: 12 August 2019; doi:10.1038/s41567-019-0613-6

The carrier-envelope-phase-sensitive component of field-driven photoemission at the tip of a nanostructure shows a dip with a sudden phase shift. This is a consequence of its nonlinear dependence on the tunnel ionization and is not limited to solids.

Size flips symmetry switch

Δευ, 12/08/2019 - 00:00

Nature Physics, Published online: 12 August 2019; doi:10.1038/s41567-019-0644-z

Whether a cell divides symmetrically or asymmetrically during early development determines the fate of its progeny. Now cell size has emerged as a key player in making this decision.

Self-propelling droplets on fibres subject to a crosswind

Δευ, 12/08/2019 - 00:00

Nature Physics, Published online: 12 August 2019; doi:10.1038/s41567-019-0599-0

A transverse wind is shown to be capable of inciting a droplet to move along a horizontal fibre due to the presence of an asymmetric wake behind the droplet. Such a perturbation can even induce repulsive interactions between droplets.

Bayesian estimation of the specific shear and bulk viscosity of quark–gluon plasma

Δευ, 12/08/2019 - 00:00

Nature Physics, Published online: 12 August 2019; doi:10.1038/s41567-019-0611-8

As the quark–gluon plasma is a short-lived state of matter, its properties cannot be measured directly. A Bayesian parameter estimation method now provides a reliable estimation of the temperature-dependent specific shear and bulk viscosities.

A cell-size threshold limits cell polarity and asymmetric division potential

Δευ, 12/08/2019 - 00:00

Nature Physics, Published online: 12 August 2019; doi:10.1038/s41567-019-0601-x

The proteins tasked with establishing polarity in a cell undergo reaction–diffusion dynamics that are shown here to impose a cell-size threshold on polarization. The limit may facilitate switching between symmetric and asymmetric modes of division.

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