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Liquid beyond the van der Waals paradigm

Nature Physics - Δευ, 12/02/2018 - 00:00

Liquid beyond the van der Waals paradigm

Liquid beyond the van der Waals paradigm, Published online: 12 February 2018; doi:10.1038/s41567-018-0052-9

An ultracold mixture of Bose gases is eight orders of magnitude more dilute than water. However, quantum fluctuations turn it into a self-bound liquid droplet.

Geodesy and metrology with a transportable optical clock

Nature Physics - Δευ, 12/02/2018 - 00:00

Geodesy and metrology with a transportable optical clock

Geodesy and metrology with a transportable optical clock, Published online: 12 February 2018; doi:10.1038/s41567-017-0042-3

An atomic clock has been deployed on a field measurement campaign to determine the height of a mountain location 1,000 m above sea level, returning a value that is in good agreement with state-of-the-art geodesy.

Wall roughness induces asymptotic ultimate turbulence

Nature Physics - Δευ, 12/02/2018 - 00:00

Wall roughness induces asymptotic ultimate turbulence

Wall roughness induces asymptotic ultimate turbulence, Published online: 12 February 2018; doi:10.1038/s41567-017-0026-3

Turbulence is seldom confined by boundaries that are perfectly smooth, but wall roughness is usually ignored. A study of flows between rotating cylinders suggests that roughness enhances turbulent transport and alters its scaling behaviour.

An optical clock to go

Nature Physics - Δευ, 12/02/2018 - 00:00

An optical clock to go

An optical clock to go, Published online: 12 February 2018; doi:10.1038/s41567-018-0047-6

Bringing next-generation atomic clocks out of the lab is not an easy task, but doing so will unlock many new possibilities. As a crucial first step, a portable atomic clock has now been deployed for relativistic geodesy measurements in the Alps.

Interaction modifiers in artificial spin ices

Nature Physics - Δευ, 12/02/2018 - 00:00

Interaction modifiers in artificial spin ices

Interaction modifiers in artificial spin ices, Published online: 12 February 2018; doi:10.1038/s41567-017-0027-2

Coupling strengths differ between neighbours in square artificial spin ices, resulting in the loss of degeneracy. Introducing mesospins on vertices of the array alleviates this problem, by tuning the strength and ratio of the interaction energies.

Ultimate evidence for the ultimate regime

Nature Physics - Δευ, 12/02/2018 - 00:00

Ultimate evidence for the ultimate regime

Ultimate evidence for the ultimate regime, Published online: 12 February 2018; doi:10.1038/s41567-017-0034-3

The ultimate regime of turbulence has been observed, more than half a century after its first prediction. Inspiration for achieving this technical feat came from the imperfections of an everyday pipe.

Dynamics of interacting fermions under spin–orbit coupling in an optical lattice clock

Nature Physics - Δευ, 05/02/2018 - 00:00

Dynamics of interacting fermions under spin–orbit coupling in an optical lattice clock

Dynamics of interacting fermions under spin–orbit coupling in an optical lattice clock, Published online: 05 February 2018; doi:10.1038/s41567-017-0029-0

Many-body effects in an interacting spin-orbit coupled Fermi gas are studied with the help of clock spectroscopy. The results provide a simple view of how strong collective dynamics arise from local interactions in the presence of spin–orbit coupling.

A quantum dipolar spin liquid

Nature Physics - Δευ, 05/02/2018 - 00:00

A quantum dipolar spin liquid

A quantum dipolar spin liquid, Published online: 05 February 2018; doi:10.1038/s41567-017-0030-7

A large-scale density matrix renormalization group study of the dipolar Heisenberg model reveals evidence for quantum spin liquid ground states on both triangular and kagome lattices.

Experimental evidence for superionic water ice using shock compression

Nature Physics - Δευ, 05/02/2018 - 00:00

Experimental evidence for superionic water ice using shock compression

Experimental evidence for superionic water ice using shock compression, Published online: 05 February 2018; doi:10.1038/s41567-017-0017-4

Although predicted to occur in planetary interiors, superionic water ice has proved elusive to identify experimentally. Laser-driven shock-compression experiments on water ice VII now verify its existence.

Bilinear magnetoelectric resistance as a probe of three-dimensional spin texture in topological surface states

Nature Physics - Δευ, 05/02/2018 - 00:00

Bilinear magnetoelectric resistance as a probe of three-dimensional spin texture in topological surface states

Bilinear magnetoelectric resistance as a probe of three-dimensional spin texture in topological surface states, Published online: 05 February 2018; doi:10.1038/s41567-017-0039-y

A method for resolving the spin texture of the surface state of a topological insulator using a transport measurement is developed. Understanding the spin texture will help engineer spintronic devices.

Life, the Universe and almost everything

Nature Physics - Πέμ, 01/02/2018 - 00:00

Life, the Universe and almost everything

Life, the Universe and almost everything, Published online: 01 February 2018; doi:10.1038/nphys4352

Life, the Universe and almost everything

Applied mathematics: The discovery of skewness

Nature Physics - Πέμ, 01/02/2018 - 00:00

Applied mathematics: The discovery of skewness

Applied mathematics: The discovery of skewness, Published online: 01 February 2018; doi:10.1038/nphys4354

Applied mathematics: The discovery of skewness

Topological physics: Hot quantum spin Hall effect

Nature Physics - Πέμ, 01/02/2018 - 00:00

Topological physics: Hot quantum spin Hall effect

Topological physics: Hot quantum spin Hall effect, Published online: 01 February 2018; doi:10.1038/nphys4356

Topological physics: Hot quantum spin Hall effect

Ultra-cold gases: A homogeneous sheet

Nature Physics - Πέμ, 01/02/2018 - 00:00

Ultra-cold gases: A homogeneous sheet

Ultra-cold gases: A homogeneous sheet, Published online: 01 February 2018; doi:10.1038/nphys4358

Ultra-cold gases: A homogeneous sheet

An early peak in ion channel research

Nature Physics - Πέμ, 01/02/2018 - 00:00

An early peak in ion channel research

An early peak in ion channel research, Published online: 01 February 2018; doi:10.1038/nphys4347

An early peak in ion channel research

Reply to 'The dynamics of Van Allen belts revisited'

Nature Physics - Πέμ, 01/02/2018 - 00:00

Reply to 'The dynamics of Van Allen belts revisited'

Reply to 'The dynamics of Van Allen belts revisited', Published online: 01 February 2018; doi:10.1038/nphys4351

Reply to 'The dynamics of Van Allen belts revisited'

Free electrons: Ultrafast laser optical pinball

Nature Physics - Πέμ, 01/02/2018 - 00:00

Free electrons: Ultrafast laser optical pinball

Free electrons: Ultrafast laser optical pinball, Published online: 01 February 2018; doi:10.1038/nphys4314

A generalization of the Kapitza–Dirac effect enables new ways of controlling free electrons with ultrashort light pulses.

In search of the nuclear clock

Nature Physics - Πέμ, 01/02/2018 - 00:00

In search of the nuclear clock

In search of the nuclear clock, Published online: 01 February 2018; doi:10.1038/nphys4349

A nuclear clock could outperform atomic clocks, but its development has turned out to be a formidable task, writes Marianna Safronova.

Femtosecond activation of magnetoelectricity

Nature Physics - Τετ, 31/01/2018 - 00:00

Femtosecond activation of magnetoelectricity

Femtosecond activation of magnetoelectricity, Published online: 31 January 2018; doi:10.1038/s41567-017-0036-1

Pump–probe measurements of CuB2O4 reveal non-reciprocal directional dichroism, demonstrating the possibility to optically induce magnetoelectricity in a material on a femtosecond timescale.

Linking high-energy cosmic particles by black-hole jets embedded in large-scale structures

Nature Physics - Δευ, 22/01/2018 - 00:00

Linking high-energy cosmic particles by black-hole jets embedded in large-scale structures

Linking high-energy cosmic particles by black-hole jets embedded in large-scale structures, Published online: 22 January 2018; doi:10.1038/s41567-017-0025-4

A model that accounts for the high-energy neutrino, gamma-ray and ultrahigh-energy cosmic-ray emissions is proposed, suggesting that they emerge from the cosmic rays accelerated by the black-hole jets in galaxy clusters.

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