Scientists built a quantum gate linking four-state photons, showing complex quantum tasks can be done with fewer steps using qudits.

The breakthrough addresses concerns that powerful quantum computers could eventually crack encryption standards to leave vulnerable financial systems, government communications, health data and media.

As artificial intelligence dominates the attention of governments, boardrooms and the media, another consequential technological shift is unfolding with far less scrutiny.The average person may not ...

The mystery of quantum phenomena inside materials—such as superconductivity, where electric current flows without energy loss—lies in when electrons move together and when they break apart. KAIST ...

Light does not “think” in any human sense. Still, under the right conditions, it can behave in a way that looks uncannily like a memory system.

To capture higher-definition and sharper images of cosmological objects, astronomers sometimes combine the data collected by several telescopes. This approach, known as long-baseline interferometry, ...

Saylor says a credible quantum threat to Bitcoin is likely more than a decade away. The practical concern is key theft via signature cryptography, not ...

Researchers at the University of Tokyo have identified a precise sweet spot where quantum reservoir computing, a machine learning approach that treats quantum systems as computational engines, reaches ...

Quantum computer research is advancing at a rapid pace. Today's devices, however, still have significant limitations: For example, the length of a quantum computation is severely limited—that is, the ...

New evidence suggests a rare triplet superconductor may help quantum computers stay in sync by preserving electron spin ...

A team of scientists from Princeton University has measured the energies of electrons in a new class of quantum materials and has found them to follow a fractal pattern. Fractals are self-repeating ...