Quantum Physics
Spin Supercurrents in Superconducting Altermagnets
Author(s): Huaiming Guo Materials from a new class of magnets could host permanent dissipationless spin currents when they enter a superconducting state. [Phys...
Nanoscale Imaging of Quantum Hall Currents
Author(s): Charles Day Electrons in graphene follow various spiraling paths when they flow around a circular barrier under the influence of a magnetic field. [...
Parallel Production of Quantum Memories
Author(s): Ryan Wilkinson A new approach manufactures many high-quality diamond-based quantum memory chips simultaneously on a single wafer. [Physics 19, s34]...
Extending the Adiabatic Theorem
Author(s): Rachel Berkowitz Like its slowly perturbed counterpart, a rapidly perturbed quantum system stays closer to the ground state than to any excited state...
Polyatomic Molecules Get Two Steps Closer to Quantum Horizon
Author(s): Christopher J. Ho and Chi Zhang Researchers have improved trapping of polyatomic molecules while also controlling their collisions—two important adva...
Can Before and After Be Superposed?
Author(s): Sophia Chen Through a quantum-switch experiment, researchers attempt to reveal “indefinite causal order”—a quantum phenomenon involving events in a b...
Building a National Quantum Strategy
Author(s): Rachel Berkowitz Andrea Damascelli recounts the struggles of coordinating different sectors to establish a quantum technology ecosystem in Canada. [...
A Time Crystal as a Clock
Author(s): Sophia Chen New theoretical work shows how an unusual state of matter that oscillates between spin states could be used in timekeeping. [Physics 19,...
Symmetry Keeps Fermions Pure in a Noisy World
Author(s): Pengfei Zhang A theoretical study reveals how to control and drive a quantum system without causing its decoherence. [Physics 19, 41] Published Mon...
Refining Control of Quantum Memories
Author(s): Ryan Wilkinson A new technique efficiently and reliably manipulates information held in a quantum memory. [Physics 19, s29] Published Tue Mar 17, 20...
Time crystals could be used to build accurate quantum clocks
Once considered an oddity of quantum physics, time crystals could be a good building block for accurate clocks and sensors, according to new calculations...
Temperature gets a new definition using a quantum device
A device that relies on quantum effects and oversized atoms may be a more reliable way to measure temperature that doesn't require calibration...
CERN levels up with new superconducting karts
CERN levels up with new superconducting karts Update: did you enjoy our April Fool’s day story? While we won’t be racing karts through the tunnel, we ar...
Backwards heat shows laws of thermodynamics may need a quantum update
We are used to heat flowing from hot objects to cool ones, and never the other way round, but now researchers have found it is possible to pull off this trick i...
Forget the multiverse. In the pluriverse, we create reality together
A radical idea that resolves many quantum paradoxes suggests there is no objective view of reality. How can the cosmos be stitched together from interlocking pe...
How Anthony Leggett pushed the boundaries of quantum physics
After the passing of physicist Anthony Leggett, columnist Karmela Padavic-Callaghan remembers their personal connection with this giant of quantum physics, and...
Revealing the magic in hybrid quantum systems
Quantum technologies rely on more than just entanglement. Another, less well-known ingredient is non-stabiliserness, often called magic The post Revealing the m...
Causality optional? Testing the "indefinite causal order" superposition
A quantum experiment shows that we can formally test if the order of events matters....
The experiments that could finally explain gravity
Cooling metal bars to near absolute zero, suspending microscopic gold beads, or searching for signs that gravity might be quantum: meet the scientists hunting f...
Trapped ion quantum technology gets smaller
Portable device could find applications in quantum computing and optical clocks The post Trapped ion quantum technology gets smaller appeared first on Physics W...
The mathematics of quantum entanglement
A team of researchers from Poland have developed new mathematical methods that could help enable better control of quantum entanglement and teleportation experi...
Loophole found that makes quantum cloning possible
Duplicating the information held in quantum computers was thought to be impossible thanks to the no-cloning theorem, but researchers have now found a workaround...
MIT scientists finally see hidden quantum “jiggling” inside superconductors
MIT physicists have built a powerful new microscope that uses terahertz light to uncover hidden quantum motions inside superconductors. By compressing this norm...
Miniature magnets break field strength record
New coiled device could rival expensive magnet facilities, say scientists The post Miniature magnets break field strength record appeared first on Physics World...
In Expanding de Sitter Space, Quantum Mechanics Gets Even More Elusive
The basic shape that best describes our expanding universe is also the hardest shape for physicists to understand. The post In Expanding de Sitter S...
A surprising new idea about how the Big Bang may have happened
Scientists at the University of Waterloo have uncovered a bold new way to explain how the universe began—one that could reshape our understanding of the Big Ban...
A quantum leap for antimatter measurements
The demonstration of the first antimatter quantum bit paves the way for substantially improved tests of nature’s fundamental symmetries....
Quantum magnetism: Spin-flip process in atomic nucleus does not account for all magnetic behavior
In the air people breathe, the water on Earth, the stars in the sky and more, atoms are the building blocks that make up the universe. Understanding the structu...
Superconductivity switched on in material once thought only magnetic
Superconductivity—the ability of a material to conduct electricity without any energy loss to heat—enables highly efficient, ultra-fast electronics essential fo...
Scientists discover bizarre new states inside tiny magnetic whirlpools
Researchers have uncovered a new way to generate exotic oscillation states in tiny magnetic structures—using only minimal energy. By exciting magnetic waves, th...
A strange new quantum state appears when atoms get “frustrated”
Physicists at UC Santa Barbara have uncovered a new way to manipulate unusual magnetic states by exploiting “frustration” inside a crystal’s atomic structure. T...
Novel approach to quantum error correction portends a scalable future for quantum computing
A University of Sydney quantum physicist has developed a new approach to quantum error correction that could significantly reduce the number of physical qubits...
Into the quantum realm
New technologies are enabling scientists to tackle previously elusive physics problems....
This new “phonon laser” could measure gravity more precisely than ever before
Scientists have taken lasers beyond light and into the realm of sound, creating a breakthrough “phonon laser” that manipulates tiny vibrations at the quantum le...
Quantum entanglement between electrons and ions captured at attosecond timescale
Quantum mechanics is extremely successful at describing the behavior of matter at the atomic level. This success forces one to accept that certain aspects of ph...
Solar cells just did the “impossible” with this 130% breakthrough
A new solar breakthrough may overcome a long-standing efficiency barrier. Researchers used a “spin-flip” metal complex to capture and multiply energy from sunli...
World's largest quantum circuit simulation for quantum chemistry achieved on 1,024 GPUs
A joint research team between the Center for Quantum Information and Quantum Biology (QIQB) at The University of Osaka and Fixstars Corporation has demonstrated...
Farting comet seen reversing its spin for the first time ever — and it may soon 'self-destruct'
A new analysis of archival Hubble Space Telescope photos reveals that a peculiar comet slowed its spin before fully reversing its rotational direction via "outg...
Ultrafast quantum light pulses measured for the first time
Researchers at the Technion—Israel Institute of Technology have, for the first time, measured the temporal duration of individual pulses of an extraordinary for...
Gravity from positivity: Single massive spin-3/2 particle makes gravity logically inevitable, study claims
Researchers at IPhT (CEA, CNRS) and the Universitat Autònoma de Barcelona have shown that gravity—and with it, supersymmetry—emerge as logical necessities whene...
How noise limits today's quantum circuits
Imagine you're trying to build a very long, complicated chain of dominoes. The aim is that each domino hits the next one perfectly, all the way down the line, p...
Useful quantum computers could be built with as few as 10,000 qubits, team finds
Quantum computers of the future may be closer to reality thanks to new research from Caltech and Oratomic, a Caltech-linked start-up company. Theorists and expe...
This floating time crystal breaks Newton’s third law of motion
Scientists have created a new kind of time crystal using sound waves to levitate tiny beads in mid-air. These particles interact in a one-sided, unbalanced way,...