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Category: computing

Enhanced quantum computers and beyond: Exploring magnons with superconducting qubits

Devices taking advantage of the collective quantum behavior of spin excitations in magnetic materials—known as magnons—have the potential to improve quantum computing devices. However, using magnons in quantum devices requires an in-depth understanding of their nature and limitations. A new experimental technique uses superconducting qubits to sensitively characterize magnon behavior in previously unexplored regimes.

Researchers in the Grainger College of Engineering at the University of Illinois Urbana-Champaign have reported in the journal Physical Review Applied that highly excited magnon behavior in can be accurately characterized by coupling the material to a superconducting qubit via a microwave cavity. This setup allowed the researchers to characterize both the number of magnons and their lifetimes when thousands of excitations are present, a regime that has not been studied well.

“To be useful in quantum computing applications, limitations on magnon systems need to be understood properly,” said Sonia Rani, the study’s lead author. “The problem is that there isn’t a good theory for when certain effects become important, and if we should expect them to lead to detrimental effects.

Q&A: Companies are racing to develop the first useful quantum computer—ultracold neutral atoms could be the key

The race to build the first useful quantum computer is on and may revolutionize the world with brand new capabilities, from medicine to freight logistics.

Tech companies all want to take the crown, with Microsoft announcing the first of its kind quantum chip in February, only days before Google’s breakthrough on .

As the race heats up, companies are turning to a new ultracold solution—neutral atoms—which Swinburne University of Technology has been exploring and making discoveries in for two decades.

Major Graphene Breakthrough: Magnet-Free Spin Currents Could Supercharge Quantum Computing

Scientists at TU Delft have unlocked a key quantum effect in graphene without using any magnetic fields, paving the way for ultra-thin quantum circuits. By layering graphene on a special magnetic crystal, they created stable spin currents that travel along the edges of the material. These current

How key brain cells help replay and store memories during rest and sleep

How does the brain store knowledge so that you actually remember what you have learned the next day or even later? To find out, researchers at the University of Oslo disconnected one type of nerve cell in the brain of mice while the animals rested after having learned something new. This gave new answers to what actually happens when you remember earlier experiences for later use. The study is published in the journal Science Advances.

In the first phase of this experiment, were trained to recognize that an image with a particular pattern meant that they would be given a reward in the form of a sweet drink. Two different groups of mice were then put in front of a computer screen where they were able to see several images containing different patterns. In order to demonstrate that they remembered which image led to a reward, the mice had to lick a small “nozzle” that dispensed the drink.

While the mice performed this action, researchers at the University of Oslo monitored the activity in their using a special microscope. “It took some time before the mice understood which pattern triggered a reward. We could see what was happening with their neurons while they mastered the task,” says researcher Kristian K. Lensjø, who works at the Institute of Basic Medical Sciences and the Department of Biosciences at the University of Oslo.

A unified framework to model synaptic dynamics during the sleep–wake cycle

Conflicting results have been observed regarding changes in synaptic strength in the cerebral cortex during the sleep-wake cycle. This computational study provides a comprehensive understanding and unified framework about synaptic dynamics during the sleep-wake cycle.

Scientists achieve teleportation between quantum computers for the first time ever

Until recently, practical attempts rarely pushed beyond proof-of-concept.

Now researchers have used the teleportation trick to forge a working logic gate between two separate quantum chips sitting about six feet apart, hinting at a future where clusters of modest processors act as one mighty computer.

A qubit is valuable because it can be zero and one at the same moment, yet that superposition collapses if the qubit feels a nudge from the outside world.

Scientists reveal how diverse cell types are produced in developing embryos

A team of scientists at the MRC Laboratory of Medical Sciences (LMS) has uncovered a previously unknown mechanism that controls how genes are switched “on” and “off” during embryonic development. Their study sheds light on how diverse cell types are produced in developing embryos.

The research, published in Developmental Cell, was led by Dr. Irène Amblard and Dr. Vicki Metzis from the Development and Transcriptional Control group, in collaboration with LMS facilities and the Chromatin and Development and Computational Regulatory Genomics groups.

All cells contain the same DNA but must turn ‘“on” and “off”—a process known as gene expression—to create different body parts. The cells in your eyes and arms harbor the same genes but “express” them differently to become each body part.

Beyond the crystal: Dynamic model captures loop flexibility in swine virus drug design

Porcine reproductive and respiratory syndrome virus (PRRSV) continues to devastate the global swine industry, yet the structural basis of how small molecules block its entry into host cells remains unclear. Researchers at the University of Tsukuba and Mahidol University developed a refined model of the PRRSV receptor domain CD163-SRCR5 using state-of-the-art computational approaches, offering new avenues for rational drug design.

While traditional drug discovery often relies on static crystal structures, many biologically important proteins, including the scavenger receptor CD163-SRCR5, contain flexible loop regions poorly captured by crystallography. These loops are critical for recognizing and , making them challenging yet attractive drug targets.

In their new study published in The Journal of Physical Chemistry Letters, the researchers used (MD) simulations, ensemble docking, and fragment molecular orbital calculations to generate a dynamic, physiologically relevant structural model of the CD163-SRCR5 domain.

Texas law gives grid operator power to disconnect data centers during crisis

The advance warning period is key for this sort of voluntary program, especially one counting on participation from hyperscale data centers with sensitive IT equipment worth billions, Kavulla said.

“This should not be the kind of demand response where you’re calling it with no notice and curtailing the customer straight off,” he said.