Physics News

Physicists Capture Atomic Motion in 4D

This image shows 4D atomic motion is captured in an iron-platinum nanoparticle at three different annealing times. Image credit: Alexander Tokarev.
Jul 8, 2019 by News Staff

A process called nucleation plays a critical role in many physical and biological phenomena that range from crystallization, melting and evaporation to the formation of clouds and the initiation of neurodegenerative diseases. However, nucleation is a challenging process to study experimentally, especially in its early stages, when several atoms or molecules start to form a new phase from a parent phase. Now, a team of physicists led by the University...

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The lattice structure of diamond contains a nitrogen-vacancy center with surrounding carbon nuclear spins; the carbon isotope 13C (green) is first entangled with an electron (blue) in the vacancy, which then wait for a photon (red) to absorb, resulting in quantum teleportation-based state transfer of the photon into the carbon memory. Image credit: Tsurumoto et al, doi: 10.1038/s42005-019-0158-0.

Physicists Teleport Quantum Information inside Diamond

Jul 4, 2019 by News Staff

A team of physicists at the Yokohama National University, Japan, has successfully demonstrated quantum teleportation — the remote exchange of quantum...

Single magnetic atoms are deposited on a surface of magnesium oxide; they are imaged by the magnetic tip of a scanning tunneling microscope which allows researchers to perform an MRI scan of the atom’s magnetic field. Image credit: Willke et al.

Physicists Use MRI to Scan Individual Atoms

Jul 3, 2019 by News Staff

A team of experimental physicists from the Institute for Basic Science, the Ewha Womans University and the IBM Almaden Research Center has performed the...

Self-Torque: Physicists Discover New Property of Light

Jul 1, 2019 by News Staff

An international team of physicists has theoretically predicted and experimentally generated light beams with a new property that they call the self-torque...

A new type quasiparticle discovered in graphene double-layer structure. This so-called composite fermion consists of one electron and two different types of magnetic flux, illustrated as blue and gold colored arrows in the figure. Composite fermions are capable of forming pairs, such unique interaction lead to experimental discovery of unexpected new quantum Hall phenomena. Image credit: Michelle Miller & Jia Li, Brown University.

Physicists Observe Exotic Quantum States in Double-Layer Graphene

Jun 26, 2019 by News Staff

An international team of physicists from the United States and Japan has demonstrated a series of fractional quantum Hall effect states that arise in double-layer...

Quantum gravity is a field of theoretical physics that seeks to describe gravity according to the principles of quantum mechanics. Image credit: Gerd Altmann.

Physicists Say Quantum Gravity ‘Has No Symmetry’

Jun 20, 2019 by News Staff

An international team of theoretical physicists has found that when gravity is combined with quantum mechanics, no global symmetries are possible. Quantum...

No one knows what dark matter is, but this invisible form of matter makes up roughly a quarter of the Universe. Image credit: NASA’s Goddard Space Flight Center.

Dark Monopoles: Theoretical Physicists Propose New Candidate for Dark Matter

Jun 13, 2019 by News Staff

Professor John Terning and Dr. Christopher Verhaaren from the University of California, Davis, have a new candidate for dark matter — a dark monopole...

The superconducting quantum refrigerator is similar to a conventional refrigerator, in that it moves a material between hot and cold reservoirs. However, instead of a refrigerant that changes from a liquid state to a gas, the electrons in a metal change from the paired superconducting state to an unpaired normal state. Image credit: Michael Osadciw, University of Rochester illustration.

Physicists Developing Superconducting Quantum Refrigerator

Jun 11, 2019 by News Staff

A research team led by University of Rochester physicists has conceived an idea for a superconducting quantum refrigerator, which would cool atoms to nearly...

Minev et al figured out how to catch and save Schrödinger’s famous cat, the symbol of quantum superposition and unpredictability. Image credit: Kat Stockton.

Physicists Find Way to ‘Catch and Save’ Schrödinger’s Cat

Jun 3, 2019 by News Staff

Schrödinger’s cat, a thought experiment envisioned by the Austrian physicist Erwin Schrödinger in 1935, is a paradox that applies the concept of superposition...

A small disk of americium-241 under the microscope. Image credit: Bionerd / CC BY 3.0.

Researchers Generate Electricity from Americium

May 28, 2019 by News Staff

Researchers in the United Kingdom have extracted americium from a plutonium stockpile and used the heat generated from this radioactive element to generate...

An electron is trapped in a quantum dot, which is formed in a 2D gas in a semiconductor wafer. However, the electron moves within the space and, with different probabilities corresponding to a wave function, remains in certain locations within its confinement (red ellipses). Using the gold gates applied electric fields, the geometry of this wave function can be changed. Image credit: University of Basel.

Physicists Determine Geometry of Electrons in Quantum Dots

May 24, 2019 by News Staff

A team of physicists at the University of Basel has experimentally mapped out the shape and orientation of electrons trapped in quantum dots. An electron...

Gravitational waves observed by Laser Interferometer Gravitational-Wave Observatory (LIGO) twin detectors were produced during the final fraction of a second of the merger of two black holes to produce a single, more massive spinning black hole. Image credit: T. Pyle / LIGO.

Gravitational Waves Leave Observable Aftereffects in Universe

May 10, 2019 by News Staff

Gravitational waves are ‘ripples’ in space-time caused by some of the most violent and energetic processes in the Universe. Albert Einstein predicted...

The first artist’s illustration shows a key part of the process that created this new black hole, as the two neutron stars spin around each other while merging. The purple material depicts debris from the merger. Image credit: NASA / CXC / M.Weiss.

LIGO and Virgo Observatories Detect Two New Gravitational Waves

May 8, 2019 by News Staff

On April 25 and 26, 2019, NSF’s Laser Interferometer Gravitational-Wave Observatory (LIGO) and the European-based Virgo detector registered two new gravitational...

Macleod et al analyzed the properties of vacuum Cherenkov radiation in strong laser pulses and the magnetic field around a pulsar. Image credit: Gerd Altmann.

High-Velocity Charged Particles Emit Cherenkov Radiation in Quantum Vacuum

May 6, 2019 by News Staff

According to new research published in the journal Physical Review Letters, charged particles traveling through empty space can emit Cherenkov radiation...

An artist’s illustration showing the patterns of signals generated by primordial standard clocks in the Big Bounce theory of the primordial Universe. Image credit: Zhong-Zhi Xianyu, Xingang Chen & Avi Loeb / Harvard-Smithsonian Center for Astrophysics.

What Was Universe Like before Big Bang?

Apr 30, 2019 by News Staff

Professor Avi Loeb of the Harvard-Smithsonian Center for Astrophysics and colleagues have proposed a new test for inflation, the theory that our Universe...

One photodetector array of the XENON1T detector seen through the other. Image credit: XENON Collaboration.

Dark-Matter Detector Measures Half-Life of Xenon-124 that’s Longer than Universe’s Age

Apr 26, 2019 by News Staff

The half-life of a process is the time after which half of the radioactive nuclei present in a sample have decayed away. Using the XENON1T dark-matter...

Several tens of thousands of particles spontaneously organize in a self-determined crystalline structure while sharing the same macroscopic wavefunction -- hallmarks of supersolidity. Image credit: University of Innsbruck.

Physicists Turn Quantum Gas into Supersolid

Apr 24, 2019 by News Staff

Predicted five decades ago, supersolidity is an exotic phase of matter where superfluidity and crystalline order coexist. By combining theory and experiments,...

Development of a ‘bubble’ of lighter sand (blue) forming in heavier sand (white). Image credit: Alex Penn / ETH Zurich.

Scientists Observe Gravitational Instability in Which ‘Bubbles’ of Lighter Sand Form and Rise through Heavier Sand

Apr 23, 2019 by News Staff

Gravitational (Rayleigh-Taylor, or R-T) instabilities are produced by the interactions of two fluids of different densities that do not mix — oil...

Digital art by Les Bossinas, Cortez III Service Corp., 1998.

Traversable Wormholes Can Exist, But They Are Not Very Useful for Space Travel, Physicists Say

Apr 15, 2019 by News Staff

Harvard University physicist Daniel Jafferis and colleagues have shown that wormholes — theoretical portals through space-time that could create...

Potassium pearls under paraffin oil. Image credit: Images of Elements / CC BY 3.0.

Physicists Confirm Existence of Chain-Melted State of Matter

Apr 10, 2019 by News Staff

Until now, atoms in physical matter were understood to exist typically in one of three states — solid, liquid or gas. An international team of physicists...

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