You can't escape quantum this and quantum that while perusing science headlines, but these articles in particular are examples of moments when quantum experiments produced surprising results, or even better, results that look really cool but we don't even know what to do with them yet. That's the best kind of surprise.
Promising quantum state found during error correction research
Sep 2023, phys.org
A team of Cornell researchers unexpectedly discovered the presence of "spin-glass" quantum state while conducting a research project designed to learn more about quantum algorithms and, relatedly, new strategies for error correction in quantum computing.The researchers emphasized that they weren't simply trying to generate a better error protection scheme when they began this research. Rather, they were studying random algorithms to learn general properties of all such algorithms."Interestingly, we found nontrivial structure," Mueller said. "The most dramatic was the existence of this spin-glass order, which points toward there being some extra hidden information floating around, which should be useable in some way for computing, though we don't know how yet."
via Cornell's Laboratory of Atomic and Solid State Physics: Vaibhav Sharma et al, Subsystem symmetry, spin-glass order, and criticality from random measurements in a two-dimensional Bacon-Shor circuit, Physical Review B (2023). DOI: 10.1103/PhysRevB.108.024205
Redefining quantum machine learning
Mar 2024, phys.org
The team has discovered that neuronal quantum networks can not only learn but also memorize seemingly random data."Our experiments show that these quantum neural networks are incredibly adept at fitting random data and labels, challenging the very foundations of how we understand learning and generalization."
via Free University of Berlin: Elies Gil-Fuster et al, Understanding quantum machine learning also requires rethinking generalization, Nature Communications (2024). DOI: 10.1038/s41467-024-45882-z
Research demonstrates a new mechanism of order formation in quantum systems
Apr 2024, phys.org
This means something for materials science which is already leaping past us. Also RIKEN:
Active matter agents change from a disordered to an ordered state in what is called a "phase transition." As a result, they move together in an organized fashion without an external controller.They created a theoretical model in which spins of subatomic particles align in one direction just like how flocking birds face the same direction while flying. They found that the ordering can appear without elaborate interactions between the agents in the quantum model."It was different from what was expected based on biophysical models."
via University of Tokyo and RIKEN: Activity-induced ferromagnetism in one-dimensional quantum many-body systems, Physical Review Research (2024). dx.doi.org/10.1103/PhysRevResearch.6.023096
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