中国物理学会期刊网
海外物理新闻

 
Quantum Gravity Limits from Planet Observations

2019-10-18 18:00:00

Author(s): Philip Ball

A new analysis improves on estimates of the upper limit on the mass of the graviton particle using Solar System data.


[Physics 12, 113] Published Fri Oct 18, 2019

doi:10.1103/Physics.12.113
 
 
Quantum Simulator Reduces Memory Storage

2019-10-17 18:00:00

A photonic quantum simulator records three possible states in a single qubit, demonstrating a clear memory advantage over classical devices. ?


[Physics] Published Thu Oct 17, 2019

 
 
Undoing a Quantum Knot

2019-10-16 18:00:00

Researchers have observed the decay of a topological knot defect in a quantum gas.


[Physics] Published Wed Oct 16, 2019

 
 
Distorting Helium Atoms with XUV Light

2019-10-15 18:00:00

An extreme-UV (XUV) laser alters the structure of doubly excited helium in experiments that pave the way for improved understanding and control of fundamental light-matter interactions.


[Physics] Published Tue Oct 15, 2019

 
 
Quantum-Fluid Droplets Hold Bevy of Charge

2019-10-14 18:00:00

Tiny droplets of superfluid helium can contain more than fifty charges, which could act as nucleation sites for growing nanostructures.


[Physics] Published Mon Oct 14, 2019

 
 
Discovering New Magnetic Materials with Machine Learning

2019-10-10 18:00:00

A new computing experiment suggests that machine-learning algorithms can accelerate the discovery and design of new magnetic materials.


[Physics] Published Thu Oct 10, 2019

 
 
Nobel Prize—Tackling Cosmic Questions

2019-10-10 18:00:00

The 2019 Nobel Prize in Physics recognizes research that helped explain the evolution of the Universe and reveal the prevalence of worlds like our own.


[Physics 12, 111] Published Thu Oct 10, 2019

doi:10.1103/Physics.12.111
 
 
Directly Measuring an Entangled State

2019-10-09 18:00:00

Author(s): David J. Starling

Researchers have directly measured the components of a nonlocal, entangled wave function, rather than relying on indirect tomographic or reconstructive techniques.


[Physics 12, 110] Published Wed Oct 09, 2019

doi:10.1103/Physics.12.110
 
 
Turning an Accelerator into a Microscope

2019-10-08 18:00:00

A linear accelerator delivers high-energy electrons that can be used to image samples too thick for conventional transmission electron microscopes.


[Physics] Published Tue Oct 08, 2019

 
 
Jamming Grains Come Full Circle

2019-10-07 18:00:00

Author(s): Stefan Luding

The characterization of a new transition in sheared grains helps to fill in the phase diagram for granular materials.


[Physics 12, 109] Published Mon Oct 07, 2019

doi:10.1103/Physics.12.109
 
 
Video—Spinning Loop of String Lifts Itself

2019-10-04 18:00:00

Author(s): David Ehrenstein

Friction with the air allows a rapidly rotating loop of string to lift up its unsupported end.


[Physics 12, 107] Published Fri Oct 04, 2019

doi:10.1103/Physics.12.107
 
 
Q&A: Paving A Path for AI in Physics Research

2019-10-03 18:00:00

Brian Nord imagines a future where machines test hypotheses on their own—and considers the challenges ahead as scientists embrace artificial intelligence techniques.


[Physics 12, 108] Published Thu Oct 03, 2019

doi:10.1103/Physics.12.108
 
 
Nuclear Spectroscopy Reveals New Shapes of Excited Nuclei

2019-10-03 18:00:00

Cadmium nuclei take on multiple shapes at low excitation energies, a discovery that overturns a long-accepted tenet of nuclear structure.


[Physics] Published Thu Oct 03, 2019

 
 
How Dark Matter Shaped the First Galaxies

2019-10-02 18:00:00

Simulations show that competing models of dark matter produce primordial star-forming regions that look very different from one another.


[Physics] Published Wed Oct 02, 2019

 
 
A New Plasma-Based Axion Detector

2019-10-01 18:00:00

A proposed device could detect the hypothesized dark matter particle in a mass regime not probed by other devices.


[Physics] Published Tue Oct 01, 2019

 
 
Quantum Correlations Take a New Shape

2019-09-30 18:00:00

Author(s): Matthew F. Pusey

A quantum network with a triangular geometry displays nonclassical correlations that appear to be fundamentally different from those so far revealed through Bell tests.


[Physics 12, 106] Published Mon Sep 30, 2019

doi:10.1103/Physics.12.106
 
 
“Quantum Foam” Scrubs Away Gigantic Cosmic Energy

2019-09-27 18:00:00

Author(s): David Lindley

Theory suggests that empty space is filled with enormous energy, but according to a new proposal this energy may be hidden because its effects cancel at the tiniest scales.


[Physics 12, 105] Published Fri Sep 27, 2019

doi:10.1103/Physics.12.105
 
 
A Cosmic Ruler at 21 Centimeters

2019-09-26 18:00:00

A theoretical study pinpoints a new standard ruler for measuring the cosmic expansion rate when stars were just starting to form.


[Physics] Published Thu Sep 26, 2019

 
 
Graphene Is Thin, but Not Infinitely So

2019-09-25 18:00:00

Author(s): John Proctor

Atomically thin graphene is considered a prototypical 2D material, but high-pressure experiments now reveal the 3D nature of its mechanical properties.


[Physics 12, 104] Published Wed Sep 25, 2019

doi:10.1103/Physics.12.104
 
 
How to Shape a Single Photon

2019-09-24 18:00:00

Consistent control of an individual photon’s amplitude and phase inside a cavity is now possible, promising applications in quantum information.


[Physics] Published Tue Sep 24, 2019

 
 
Leaf-Like Veins Are Key to Efficient Pump

2019-09-20 18:00:00

Author(s): Mark Buchanan

A network of “veins” improves performance for a leaf-mimicking pump that could be used in microfluidics devices.


[Physics 12, 102] Published Fri Sep 20, 2019

doi:10.1103/Physics.12.102
 
 
Arts & Culture: Science as a Laughing Matter

2019-09-20 18:00:00

The ceremony for the Ig Nobel prizes—spoofs of the real Nobel prizes—gives the public a chance to laugh at science’s expense…without having to sit through any long speeches.


[Physics 12, 103] Published Fri Sep 20, 2019

doi:10.1103/Physics.12.103
 
 
Imaging Water Molecules on Metal

2019-09-19 18:00:00

Atomic force microscopy reveals the structure of a single layer of water molecules adsorbed on a nickel surface, potentially expanding our understanding of catalysis. ?


[Physics] Published Thu Sep 19, 2019

 
 
A One-Way Road for Microwaves

2019-09-18 18:00:00

A simple device controls which direction microwaves travel in a circuit, a critical ingredient for quantum technologies that demand sensitive signal detection.


[Physics] Published Wed Sep 18, 2019

 
 
Softening Tones Make Shear-Thickening Fluids Relax

2019-09-17 18:00:00

An acoustic signal can control the viscosity in shear-thickening materials, which have potential uses as impact absorbers.


[Physics] Published Tue Sep 17, 2019

 
 
Surfing on a Wave of Quantum Chaos

2019-09-16 18:00:00

Author(s): Xiaoliang Qi

A model based on Brownian motion describes the tsunami-like propagation of chaotic behavior in a system of quantum particles.


[Physics 12, 101] Published Mon Sep 16, 2019

doi:10.1103/Physics.12.101
 
 
Teaching Energy Before Forces

2019-09-13 18:00:00

Author(s): Philip Ball

A calculus-based introductory physics course that postpones the challenges of vectors by starting with energy concepts improves students’ learning.


[Physics 12, 100] Published Fri Sep 13, 2019

doi:10.1103/Physics.12.100
 
 
Hunting for Hair on Coalescing Black Holes

2019-09-12 18:00:00

A fresh look at data from the first detected black-hole merger supports the “no hair” theorem and proves the potential of black-hole spectroscopy.


[Physics] Published Thu Sep 12, 2019

 
 
Diamond Qubits Take the Stage

2019-09-11 18:00:00

A ten-qubit system based on spins in impure diamond achieves coherence times of over a minute.


[Physics] Published Wed Sep 11, 2019

 
 
Playing a Quantum “Oldie” on a Turntable

2019-09-10 18:00:00

A well-known quantum experiment is performed on a rotating lab table—offering a probe of quantum physics in a noninertial reference frame.


[Physics] Published Tue Sep 10, 2019

 
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