Physics News

Physicists Demonstrate ‘Teleportation’ of Quantum Gate between Two Qubits

A chip designed to operate as a 128-qubit superconducting adiabatic quantum optimization processor. Image credit: D-Wave Systems, Inc.
Sep 6, 2018 by News Staff

A team of scientists at Yale University has experimentally demonstrated one of the key steps in building the architecture for quantum computers — the ‘teleportation’ of a quantum gate between two logical qubits, on demand. A chip designed to operate as a 128-qubit superconducting adiabatic quantum optimization processor. Image credit: D-Wave Systems, Inc. A quantum computer has the potential to efficiently solve problems that are intractable...

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A candidate event display for the production of a Higgs boson decaying to two bottom quarks (blue cones), in association with a W boson decaying to a muon (red) and a neutrino. The neutrino leaves the detector unseen, and is reconstructed through the missing transverse energy (dashed line). Image credit: ATLAS Collaboration / CERN.

Physicists Observe Long-Sought Decay of Higgs Boson to Bottom Quarks

Aug 28, 2018 by News Staff

Physicists from the ATLAS and CMS collaborations at CERN’s Large Hadron Collider have observed the Higgs boson decaying into a pair of bottom quarks...

Artist’s impression of a cloud of trapped antihydrogen atoms. Image credit: Chukman So.

CERN Physicists Observe Lyman-alpha Transition in Antihydrogen

Aug 24, 2018 by News Staff

Physicists from the ALPHA Collaboration at CERN have detected the Lyman-alpha transition — when the hydrogen electron transitions between the lowest-energy...

How hot is Schrödinger’s coffee? Image credit: Myriams Fotos / Wynn Pointaux / Sci-News.com.

Measuring Temperature of Schrödinger’s Coffee

Aug 15, 2018 by News Staff

A new uncertainty relation, linking quantum mechanics and the precision with which temperature can be measured, has been discovered by University of Exeter...

Neutron stars are the smallest, densest stars in the Universe. True to their name, neutron stars are composed almost entirely of neutrons. Duer et al suggest that some properties of neutron stars may be influenced not only by their multitude of densely packed neutrons, but also by a substantially smaller fraction of protons -- positively charged particles that make up just 5% of a neutron star. This is an illustration of a neutron star. Image credit: Casey Reed, Penn State University.

Protons May Have Outsize Influence on Properties of Neutron Stars

Aug 14, 2018 by News Staff

A study conducted by an international consortium called the CLAS Collaboration, made up of 182 members from 42 institutions in 9 countries, has confirmed...

Ahn et al levitated a nanoparticle in vacuum and driven it to rotate at high speed, which they hope will help them study the properties of vacuum and quantum mechanics. Image credit: Vincent Walter, Purdue University.

Researchers Develop World’s Fastest Nanomechanical Rotor

Jul 24, 2018 by News Staff

At more than 60 billion revolutions per minute, a nanomechanical rotor developed by Purdue University researcher Tongcang Li and co-authors is more than...

Rossi et al operate a hybrid electron pump in silicon obtained by coupling a quantum dot to multiple parasitic states and achieve robust current quantization up to a few gigahertz. Image credit: Rossi et al, doi: 10.1021/acs.nanolett.8b00874.

Researchers Move One Step Closer to High-Performance Quantum Computing

Jul 12, 2018 by News Staff

A multinational team of researchers led by University of Cambridge scientist Dr. Alessandro Rossi and University of Adelaide’s Dr. Giuseppe Tettamanzi...

Nitrogen is most-commonly bonded with itself in diatomic N2 molecules; a new study confirms that it becomes a metallic fluid when subjected to the extreme pressure and temperature conditions found deep inside the Earth and other planets. Image credit: Alexander Goncharov.

Extreme Pressures and Temperatures Turn Nitrogen Metallic

Jul 10, 2018 by News Staff

New research indicates that nitrogen, one of the most-common elements in the Universe and the dominant gas in the atmosphere of Earth, becomes a metallic...

Excitation spectra of the Higgs-like state: (a) excitation spectra of the Higgs-like state for different interaction strengths, 1/(kFa); the different levels of background condensate fraction are due to the different 1/(kFa); the solid lines shows the Gaussian fit to the high-frequency side of the spectra; the error bars show the standard deviation of approximately four measurements; (b) time-of-flight image of the condensate with the thermal background subtracted at 1/(kFa)=−0.43; rings indicate momentum intervals of 0.02kF; (c) momentum-resolved analysis of the Higgs excitation inside the condensate by averaging the optical density in the color-coded rings in (b) for different modulation frequencies; the resonance occurs at the same modulation frequency for all momenta. Image credit: Behrle et al, doi: 10.1038/s41567-018-0128-6.

Experiment Provides Further Insights into Higgs Boson Physics

Jun 29, 2018 by News Staff

A new experiment by physicists at the University of Bonn, Germany, has achieved a Higgs-like state in a system composed of ultracold atoms. Excitation...

Illustration of part of the periodic table of elements with four new elements in period 7, with oganesson specifically highlighted. Image credit: Erin O’Donnell, National Superconducting Cyclotron Laboratory / Andy Sproles, Oak Ridge National Laboratory.

Researchers Explore Limits of the Periodic Table of Elements

Jun 20, 2018 by News Staff

At 150 years old, the periodic table of chemical elements is still growing. In 2016, four new elements with atomic numbers 113, 115, 117 and 118 were added...

Visualization of a data event from the tt¯H(γγ) Had BDT bin with the largest signal over background ratio; the event contains two photon candidates, with a diphoton mass of 125.4 GeV; in addition, six jets are reconstructed using the anti-kt algorithm and R = 0.4, including one jet that is b-tagged using a 77% efficiency working point; the photons correspond to the green towers in the electromagnetic calorimeter, while the jets (b-jets) are shown as yellow (blue) cones. Image credit: ATLAS Collaboration.

Physicists Observe Simultaneous Production of Higgs Boson with Top Quark-Antiquark Pair

Jun 8, 2018 by News Staff

In July 2012, ATLAS (A Toroidal LHC ApparatuS) and CMS (Compact-Muon-Solenoid) experiments at CERN’s Large Hadron Collider jointly announced the discovery...

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.

Recent Gravitational-Wave Event Likely Created Low-Mass Black Hole

Jun 5, 2018 by News Staff

A new study using X-ray data from NASA’s Chandra X-ray Observatory indicates that the neutron star merger that became the gravitational wave source,...

This artist’s impression shows the evolution of the Universe beginning with the Big Bang on the left followed by the appearance of the Cosmic Microwave Background. The formation of the first stars ends the cosmic dark ages, followed by the formation of galaxies. Image credit: M. Weiss / Harvard-Smithsonian Center for Astrophysics.

Does Small Fraction of Dark Matter Particles Carry Electric Mini-Charge?

Jun 4, 2018 by News Staff

A duo of astrophysicists is proposing a new model for the invisible material that makes up most of the Universe: it’s possible that a small fraction...

Ruthenium. Image credit: Metalle-W / CC BY-SA 3.0.

Researchers Discover 4th Room-Temperature Ferromagnetic Element: Ruthenium

May 29, 2018 by News Staff

A platinum-group chemical element called ruthenium (Ru) is the fourth single element to have unique ferromagnetic properties at room temperature. Ruthenium....

di-Omega dibaryon. Image credit: Keiko Murano.

Physicists Predict Existence of ‘Most Strange’ Dibaryon Particle

May 25, 2018 by News Staff

Physicists from the HAL QCD Collaboration predict the existence of a new type of dibaryon, a particle that contains six quarks instead of the usual three....

The first measurement of a subatomic particle’s mechanical property reveals the distribution of pressure inside the proton. Image credit: Thomas Jefferson National Accelerator Facility.

Physicists Measure Pressure Distribution inside Proton

May 18, 2018 by News Staff

The proton, one of the components of atomic nuclei, is composed of fundamental particles called quarks and gluons. A team of physicists at the Department...

This picture shows the setup of the experiment. Image credit: Jian-Wei Pan’s Group.

Global Experiment Challenges Einstein’s Principle of Local Realism: BIG Bell Test

May 11, 2018 by News Staff

A Bell test, named for the Northern Irish physicist John Stewart Bell, is a randomized trial that compares observations against the philosophical worldview...

Professor Stephen Hawking.

Professor Stephen Hawking’s Final Theory on Origin of Universe

May 3, 2018 by News Staff

Professor Stephen Hawking’s theory about the Big Bang, which he worked on in collaboration with Katholieke Universiteit Leuven’s Professor Thomas Hertog,...

Rovny et al looked for a signature of a discrete time crystal in a crystal of monoammonium phosphate. Image credit: Michael Marsland, Yale University.

Researchers Find Signs of ‘Time Crystal’ in Ammonium Dihydrogen Phosphate

May 2, 2018 by News Staff

A team of physicists at Yale University has observed a signature of a discrete time crystal (DTC) in an unexpected place: a crystal of ammonium dihydrogen...

Physicists Entangle Two Macroscopic-Scale Objects

Apr 30, 2018 by News Staff

Entanglement — an intriguing phenomenon in which two distant objects can manifest correlations, even if they are far away from each other —...

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