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An ultrasonic shake-up

Δευ, 04/03/2019 - 00:00

An ultrasonic shake-up

An ultrasonic shake-up, Published online: 04 March 2019; doi:10.1038/s41567-019-0463-2

Ultrasonic radiation forces are harnessed to trap and then shake clusters of spheres — mimicking the effect of temperature on cluster formation in granular systems. This assembly process has applications from the nanoscale to the macroscale.

Island hopping for cells

Δευ, 04/03/2019 - 00:00

Island hopping for cells

Island hopping for cells, Published online: 04 March 2019; doi:10.1038/s41567-019-0470-3

A two-state hopping experiment combined with a dynamical systems model reveals that cancer cells are deterministically driven across barriers, whereas normal cells cross only with the help of stochastic fluctuations.

A primary radiation standard based on quantum nonlinear optics

Δευ, 04/03/2019 - 00:00

A primary radiation standard based on quantum nonlinear optics

A primary radiation standard based on quantum nonlinear optics, Published online: 04 March 2019; doi:10.1038/s41567-019-0447-2

Triggered by the fluctuations of the electromagnetic vacuum, parametric down-conversion offers a new primary radiation standard based on quantum nonlinear optics.

Space-based gravitational wave detection and how LISA Pathfinder successfully paved the way

Παρ, 01/03/2019 - 00:00

Space-based gravitational wave detection and how LISA Pathfinder successfully paved the way

Space-based gravitational wave detection and how LISA Pathfinder successfully paved the way, Published online: 01 March 2019; doi:10.1038/s41567-019-0462-3

In 2016 and 2017, the LISA Pathfinder mission successfully proved that the technologies for the space-based gravitational wave detector LISA are ready. LISA is now scheduled to launch in the early 2030s, to open a so far unexploited scientific field.

A world of rain

Παρ, 01/03/2019 - 00:00

A world of rain

A world of rain, Published online: 01 March 2019; doi:10.1038/s41567-019-0467-y

A world of rain

March of physics

Παρ, 01/03/2019 - 00:00

March of physics

March of physics, Published online: 01 March 2019; doi:10.1038/s41567-019-0474-z

In praise of the March meeting of the American Physical Society.

It’s how you wear it

Παρ, 01/03/2019 - 00:00

It’s how you wear it

It’s how you wear it, Published online: 01 March 2019; doi:10.1038/s41567-019-0465-0

It’s how you wear it

Where no one has gone before

Παρ, 01/03/2019 - 00:00

Where no one has gone before

Where no one has gone before, Published online: 01 March 2019; doi:10.1038/s41567-019-0453-4

Where no one has gone before

Going into resonance

Παρ, 01/03/2019 - 00:00

Going into resonance

Going into resonance, Published online: 01 March 2019; doi:10.1038/s41567-019-0458-z

Going into resonance

π ≈ 3.141, not only now, but forever

Παρ, 01/03/2019 - 00:00

π ≈ 3.141, not only now, but forever

π ≈ 3.141, not only now, but forever, Published online: 01 March 2019; doi:10.1038/s41567-019-0444-5

In 2016, Peter Trueb computed 22.4 trillion digits of π. Ahead of π Day on 14 March, he reflects on the nature of π and its role in mathematics, science and philosophy.

Long-awaited degeneracy

Παρ, 01/03/2019 - 00:00

Long-awaited degeneracy

Long-awaited degeneracy, Published online: 01 March 2019; doi:10.1038/s41567-019-0469-9

Long-awaited degeneracy

Turning a molecule into a coherent two-level quantum system

Δευ, 25/02/2019 - 00:00

Turning a molecule into a coherent two-level quantum system

Turning a molecule into a coherent two-level quantum system, Published online: 25 February 2019; doi:10.1038/s41567-019-0436-5

A molecule placed in an optical microcavity behaves as a model two-level quantum system, as demonstrated via laser extinction and interaction with single photons.

Stress management in composite biopolymer networks

Δευ, 25/02/2019 - 00:00

Stress management in composite biopolymer networks

Stress management in composite biopolymer networks, Published online: 25 February 2019; doi:10.1038/s41567-019-0443-6

Collagen networks go from soft to rigid when strained, but in tissue they exist in a soft matrix. An enhanced stiffness and delayed strain-stiffening is now revealed in the composite, which may explain the remarkable sensitivity of living tissue.

Dimensional reduction, quantum Hall effect and layer parity in graphite films

Δευ, 25/02/2019 - 00:00

Dimensional reduction, quantum Hall effect and layer parity in graphite films

Dimensional reduction, quantum Hall effect and layer parity in graphite films, Published online: 25 February 2019; doi:10.1038/s41567-019-0427-6

The quantum Hall effect is thought to exist only in two-dimensional materials. Here, transport measurements show that thin graphite slabs have a 2.5-dimensional version, with a parity effect for samples with odd and even number of layers.

Magnon–fluxon interaction in a ferromagnet/superconductor heterostructure

Δευ, 25/02/2019 - 00:00

Magnon–fluxon interaction in a ferromagnet/superconductor heterostructure

Magnon–fluxon interaction in a ferromagnet/superconductor heterostructure, Published online: 25 February 2019; doi:10.1038/s41567-019-0428-5

A spectral study on a ferromagnet/superconductor heterostructure reveals the interaction between the spin-wave excitations in a magnetically ordered system (magnons) and the magnetic flux quanta formed in a superconductor (fluxons).

First constraint on the neutrino-induced phase shift in the spectrum of baryon acoustic oscillations

Δευ, 25/02/2019 - 00:00

First constraint on the neutrino-induced phase shift in the spectrum of baryon acoustic oscillations

First constraint on the neutrino-induced phase shift in the spectrum of baryon acoustic oscillations, Published online: 25 February 2019; doi:10.1038/s41567-019-0435-6

In the early Universe, fluctuations in the neutrino density produced a distinct shift in the temporal phase of sound waves in the primordial plasma. The size of this phase shift has now been constrained through baryon acoustic oscillation data.

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