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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 36 λεπτά

Quantum sensing of a coherent single spin excitation in a nuclear ensemble

Δευ, 15/02/2021 - 00:00

Nature Physics, Published online: 15 February 2021; doi:10.1038/s41567-020-01161-4

A single excitation in a semiconductor nuclear spin ensemble is detected with parts-per-million accuracy using the coupling between the ensemble and an electron-spin quantum dot.

Nanoscale mechanics of antiferromagnetic domain walls

Δευ, 15/02/2021 - 00:00

Nature Physics, Published online: 15 February 2021; doi:10.1038/s41567-020-01157-0

High-resolution magnetometry shows that the shape of domain walls in Cr2O3 is determined by the energetic cost of their surface area. The walls behave like elastic surfaces that avoid thicker parts of the sample where they would need to be larger.

A hierarchy of protein patterns robustly decodes cell shape information

Δευ, 15/02/2021 - 00:00

Nature Physics, Published online: 15 February 2021; doi:10.1038/s41567-021-01164-9

Cells exploit protein pattern formation to perform key processes, and do so while undergoing major shape changes. Experiments and theory together reveal a shape-adaptation mechanism capable of controlling protein dynamics even as the cell deforms.

Deep moiré potentials in twisted transition metal dichalcogenide bilayers

Δευ, 15/02/2021 - 00:00

Nature Physics, Published online: 15 February 2021; doi:10.1038/s41567-021-01174-7

The electrical potential created by a moiré pattern in twisted transition metal dichalcogenide bilayers can be surprisingly deep, trapping electrons that can possibly be used for opto-electronic or quantum simulation applications.

Predictably random

Πέμ, 11/02/2021 - 00:00

Nature Physics, Published online: 11 February 2021; doi:10.1038/s41567-021-01177-4

Two experiments using entangled photons have successfully generated more randomness than consumed — at a level of security that is all but certain. They did so by exploiting non-locality, one of the most counterintuitive aspects of quantum mechanics.

Probing bulk topological invariants using leaky photonic lattices

Πέμ, 11/02/2021 - 00:00

Nature Physics, Published online: 11 February 2021; doi:10.1038/s41567-020-01144-5

Topological materials are characterized by the topological invariants of filled bands, which cannot be used for bosonic systems. Instead, their topological invariants can be found via the transition from bound to leaky modes in photonic lattices.

Device-independent randomness expansion against quantum side information

Πέμ, 11/02/2021 - 00:00

Nature Physics, Published online: 11 February 2021; doi:10.1038/s41567-020-01147-2

Device-independent randomness expansion is demonstrated in an experiment that is secure against quantum adversaries as established by the entropy accumulation theorem.

A self-correcting qubit

Τετ, 10/02/2021 - 00:00

Nature Physics, Published online: 10 February 2021; doi:10.1038/s41567-021-01175-6

The unavoidable effects of noise make quantum error correction necessary to realize the full potential of quantum computers. Devices that correct errors autonomously can avoid the computational and hardware overheads of traditional approaches.

Light captured in flight

Δευ, 08/02/2021 - 00:00

Nature Physics, Published online: 08 February 2021; doi:10.1038/s41567-021-01179-2

Light captured in flight

Political union through science

Δευ, 08/02/2021 - 00:00

Nature Physics, Published online: 08 February 2021; doi:10.1038/s41567-020-01155-2

The metric system is one of the enduring achievements of the French Revolution. Martin Milton recounts how it was also intended to unite nations.

Hello, school!

Δευ, 08/02/2021 - 00:00

Nature Physics, Published online: 08 February 2021; doi:10.1038/s41567-021-01173-8

Hello, school!

Biden time

Δευ, 08/02/2021 - 00:00

Nature Physics, Published online: 08 February 2021; doi:10.1038/s41567-021-01183-6

Unlike their predecessors in the White House, Joe Biden and Kamala Harris are placing research and development at the centre of their policy agenda. This change was as sorely needed as it is welcome, but the stakes for the new US administration remain high.

Stay just a little bit longer

Πέμ, 04/02/2021 - 00:00

Nature Physics, Published online: 04 February 2021; doi:10.1038/s41567-021-01168-5

The short lifetime of light-induced superconductivity prevents the measurement of its transport properties. Encouraging this state to stay a little longer in K3C60 allows the observation of vanishing electrical resistance.

Work with what you’ve got

Πέμ, 04/02/2021 - 00:00

Nature Physics, Published online: 04 February 2021; doi:10.1038/s41567-020-01126-7

Quantum computing combines great promise with daunting challenges — the road to devices that solve real-world problems is still long. Now, an implementation of a quantum algorithm maps the problems we want to solve to the devices we already have.

Quantum approximate optimization of non-planar graph problems on a planar superconducting processor

Πέμ, 04/02/2021 - 00:00

Nature Physics, Published online: 04 February 2021; doi:10.1038/s41567-020-01105-y

It is hoped that quantum computers may be faster than classical ones at solving optimization problems. Here the authors implement a quantum optimization algorithm over 23 qubits but find more limited performance when an optimization problem structure does not match the underlying hardware.

Polarization entanglement-enabled quantum holography

Πέμ, 04/02/2021 - 00:00

Nature Physics, Published online: 04 February 2021; doi:10.1038/s41567-020-01156-1

By exploiting polarization entanglement between photons, quantum holography can circumvent the need for first-order coherence that is vital to classical holography.

High-temperature topological superconductivity in twisted double-layer copper oxides

Πέμ, 04/02/2021 - 00:00

Nature Physics, Published online: 04 February 2021; doi:10.1038/s41567-020-01142-7

Two monolayers of bismuth-containing cuprate will form a high-temperature topological superconductor when stacked with an approximately 45° rotation between the layers.

Evidence for metastable photo-induced superconductivity in K<sub>3</sub>C<sub>60</sub>

Πέμ, 04/02/2021 - 00:00

Nature Physics, Published online: 04 February 2021; doi:10.1038/s41567-020-01148-1

Evidence for light-induced superconductivity in K3C60 was limited to optical methods due to the short lifetime of the phase. Extending the lifetime from picoseconds to nanoseconds now allows measurement of its negligible electrical resistance.

Moiré heterostructures as a condensed-matter quantum simulator

Δευ, 01/02/2021 - 00:00

Nature Physics, Published online: 01 February 2021; doi:10.1038/s41567-020-01154-3

Moiré heterostructures have latterly captured the attention of condensed-matter physicists. This Review Article explores the idea of adopting them as a quantum simulation platform that enables the study of strongly correlated physics and topology in quantum materials.

Publisher Correction: Bacteria solve the problem of crowding by moving slowly

Πέμ, 28/01/2021 - 00:00

Nature Physics, Published online: 28 January 2021; doi:10.1038/s41567-021-01181-8

Publisher Correction: Bacteria solve the problem of crowding by moving slowly

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