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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 9 ώρες 29 λεπτά

Shot noise does not always provide the quasiparticle charge

Πέμ, 29/09/2022 - 00:00

Nature Physics, Published online: 29 September 2022; doi:10.1038/s41567-022-01758-x

Shot noise has traditionally been used to measure the charge of quasiparticles in a variety of mesoscopic systems. However, at sufficiently low temperatures, this usual notion tends to break down for fractional quantum Hall effect states.

Evidence for a spinon Kondo effect in cobalt atoms on single-layer 1T-TaSe<sub>2</sub>

Πέμ, 29/09/2022 - 00:00

Nature Physics, Published online: 29 September 2022; doi:10.1038/s41567-022-01751-4

Unconventional quasiparticles carrying spin but not electric charge emerge in quantum spin liquid phases. The Kondo interaction of these spinon quasiparticles with magnetic impurities may now have been observed.

Kicked rotors back in action

Δευ, 26/09/2022 - 00:00

Nature Physics, Published online: 26 September 2022; doi:10.1038/s41567-022-01738-1

A quantum rotor periodically kicked stops absorbing energy after a certain time and enters into a localized regime. Two experiments with cold atoms have now shown how many-body interactions can suppress dynamical localization.

Interaction-driven breakdown of dynamical localization in a kicked quantum gas

Δευ, 26/09/2022 - 00:00

Nature Physics, Published online: 26 September 2022; doi:10.1038/s41567-022-01724-7

Periodic kicking of a quantum system leads to dynamical localization and to the failure of thermalization. Measurements on a kicked Bose–Einstein condensate now show how many-body interactions induce the breakdown of dynamical localization.

Many-body dynamical delocalization in a kicked one-dimensional ultracold gas

Δευ, 26/09/2022 - 00:00

Nature Physics, Published online: 26 September 2022; doi:10.1038/s41567-022-01721-w

The quantum kicked rotor is a paradigmatic non-interacting model of quantum chaos and ergodicity breaking. An experiment with a kicked Bose–Einstein condensate now explores the influence of many-body interactions on the onset of quantum chaos.

Light in the darkness

Πέμ, 22/09/2022 - 00:00

Nature Physics, Published online: 22 September 2022; doi:10.1038/s41567-022-01756-z

Laser light is usually limited to the same wavelength range as the spontaneous emission of the active material. A judicious choice of dielectric coatings on the cavity has now enabled laser emission far beyond the spectral range of the gain medium.

Flavour-selective localization in interacting lattice fermions

Πέμ, 22/09/2022 - 00:00

Nature Physics, Published online: 22 September 2022; doi:10.1038/s41567-022-01726-5

A Mott insulator forms when strong interactions between particles cause them to become localized. A cold atom simulator has now been used to realize a selective Mott insulator in which atoms are localized or propagating depending on their spin state.

Multiphonon-assisted lasing beyond the fluorescence spectrum

Πέμ, 22/09/2022 - 00:00

Nature Physics, Published online: 22 September 2022; doi:10.1038/s41567-022-01748-z

As laser action emerges from fluorescence, its emission wavelength lies within the fluorescence spectrum. Exploiting multiphonon processes can take the laser emission far beyond the spectral limits defined by a material’s intrinsic fluorescence.

Coherent simulation with thousands of qubits

Τρί, 20/09/2022 - 00:00

Nature Physics, Published online: 20 September 2022; doi:10.1038/s41567-022-01772-z

Using a quantum annealer to simulate the dynamics of phase transitions shows that superconducting quantum devices can coherently evolve systems of thousands of individual elements. This is an important step toward quantum simulation and optimization.

Prospects for a cosmopolitan right to scientific progress

Δευ, 19/09/2022 - 00:00

Nature Physics, Published online: 19 September 2022; doi:10.1038/s41567-022-01771-0

Declaring a cosmopolitan right to scientific progress risks perpetuating the inequities it aims to overcome. Instead, science ought to be reimagined in a way that directly addresses its links to nationalist projects and harmful capitalist practices.

Experimental observation of open structures in elemental magnesium at terapascal pressures

Δευ, 19/09/2022 - 00:00

Nature Physics, Published online: 19 September 2022; doi:10.1038/s41567-022-01732-7

Numerical studies have predicted that solids at extremely high pressures should exhibit changes in structure driven by quantum mechanical effects. These predictions have now been verified in magnesium.

Entanglement spread is bounded by area

Πέμ, 15/09/2022 - 00:00

Nature Physics, Published online: 15 September 2022; doi:10.1038/s41567-022-01739-0

Limits on the quantum entanglement entropy in one dimension have been a key factor in understanding the physics of many-body systems. A bound that applies in any dimension has now been derived for a different measure known as entanglement spread.

A design principle to predict strongly correlated topological semimetals

Πέμ, 15/09/2022 - 00:00

Nature Physics, Published online: 15 September 2022; doi:10.1038/s41567-022-01737-2

A proposed materials design principle can facilitate the discovery of strongly correlated topological semimetals. It predicts promising candidate materials by cross referencing theoretical models based on realistic crystal structures with a materials database. This approach is verified by synthesizing and experimentally investigating a proposed material.

Entanglement spread area law in gapped ground states

Πέμ, 15/09/2022 - 00:00

Nature Physics, Published online: 15 September 2022; doi:10.1038/s41567-022-01740-7

Entanglement entropy between two parts of a quantum state generally grows with volume, but for one-dimensional and some two-dimensional ground states, it scales with area. An area law has now been proven for a related metric in any dimension or geometry.

Topological semimetal driven by strong correlations and crystalline symmetry

Πέμ, 15/09/2022 - 00:00

Nature Physics, Published online: 15 September 2022; doi:10.1038/s41567-022-01743-4

Strongly correlated topological materials are hard to identify. Now a design principle suggests a method for producing many topological metals where strong electron–electron interactions are a driving force.

Coherent quantum annealing in a programmable 2,000 qubit Ising chain

Πέμ, 15/09/2022 - 00:00

Nature Physics, Published online: 15 September 2022; doi:10.1038/s41567-022-01741-6

The coherent dynamics of the transverse-field Ising model driven through a quantum phase transition can be accurately simulated using a large-scale quantum annealer.

Complex optics

Πέμ, 08/09/2022 - 00:00

Nature Physics, Published online: 08 September 2022; doi:10.1038/s41567-022-01750-5

Complex optics

Qubit readout in miniature

Πέμ, 08/09/2022 - 00:00

Nature Physics, Published online: 08 September 2022; doi:10.1038/s41567-022-01753-2

Qubit readout in miniature

Powered by puddles

Πέμ, 08/09/2022 - 00:00

Nature Physics, Published online: 08 September 2022; doi:10.1038/s41567-022-01760-3

Powered by puddles

True to its name

Πέμ, 08/09/2022 - 00:00

Nature Physics, Published online: 08 September 2022; doi:10.1038/s41567-022-01759-w

True to its name

Σελίδες

Πανεπιστήμιο Κρήτης - Τμήμα Φυσικής - Πανεπιστημιούπολη Βουτών - TK 70013 Βασιλικά Βουτών, Ελλάδα
τηλ: +30 2810 394300 - email: chair@physics.uoc.gr