The 2023 Nobel Prize in Chemistry honors Moungi G. Bawendi of the Massachusetts Institute of Technology (MIT), Louis E. Brus from Columbia University, and Alexei I… Continue Reading →
Category: quantum physics – Page 198
Rabi-like splitting observed under electrical control in artificial magnets
Rabi-like splitting is one of the key concepts in modern quantum technology. Fully understanding it can help us advance our knowledge in quantum information processing. Assistant Professor Aakanksha Sud (Tohoku University), Dr. Kei Yamamoto (JAEA), Professor Shigemi Mizukami (Tohoku University), and collaborators discovered that Rabi-like splitting could be achieved using nonlinear coupling, which remarkably preserves the symmetries of the system. This result opens up various possibilities to deepen our understanding of nonlinear dynamics and coupling phenomena in artificial control.
The findings were published in Physical Review Letters on June 20, 2025.
In quantum physics, when there is a coupling between two harmonic oscillators with an ideal oscillation frequency, the oscillation frequency splits to two different frequencies in the coupled system. The difference in these two frequencies is referred to as Rabi splitting.
This Forbidden Particle Could Break String Theory
Physicists from the University of Pennsylvania, working with colleagues at Arizona State University, are examining the limitations of a framework that aims to unify the laws of physics throughout the universe. There are two great pillars of thought that don’t quite fit together in physics. The St
Shedding new light on invisible forces: Hidden magnetic clues in everyday metals unlocked
A team of scientists has developed a powerful new way to detect subtle magnetic signals in common metals like copper, gold, and aluminum—using nothing more than light and a clever technique. Their research, recently published in Nature Communications, could pave the way for advances in everything from smartphones to quantum computing.
For over a century, scientists have known that electric currents bend in a magnetic field—a phenomenon known as the Hall effect. In magnetic materials like iron, this effect is strong and well understood. But in ordinary, non-magnetic metals like copper or gold, the effect is much weaker.
In theory, a related phenomenon—the optical Hall effect—should help scientists visualize how electrons behave when light and magnetic fields interact. But at visible wavelengths, this effect has remained far too subtle to detect. The scientific world knew it was there, but lacked the tools to measure it.
Consciousness, Matter and Quantum Strangeness; Part 1
What Is a Particle?
How the Quantum Eraser Rewrites the Past | Space Time | PBS Digital Studios.
https://www.youtube.com/watch?v=8ORLN_KwAgs.
https://www.patreon.com/Formscapes.
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Quantum on the Cusp—What to Prepare for in the Emerging Ecosystem of Quantum Tech and Computing
Dear Friends & Colleagues, Like artificial intelligence, quantum technologies will transform our world as we know it. This issue focuses on what quantum constitutes and the promises and challenges of this emerging technology.
Rethinking the Big Bang: Gravity and quantum ripples may explain cosmic origins
A team of scientists led by expert Raúl Jiménez, ICREA researcher at the University of Barcelona’s Institute of Cosmos Sciences (ICCUB), in collaboration with the University of Padua (Italy), has presented a revolutionary theory about the origins of the universe. The study, published in the journal Physical Review Research, introduces a radical change in the understanding of the first moments after the Big Bang, without relying on the speculative assumptions that physicists have traditionally assumed.
For decades, cosmologists have worked under the inflationary paradigm, a model that suggests that the universe expanded extremely rapidly, in a fraction of a second, thus paving the way for everything we observe today. But this model includes too many adjustable parameters—the free parameters—which can be modified. Scientifically, this poses a problem, as it makes it difficult to know whether a model is truly predicting or simply adapting to the data.
In a significant breakthrough, the team has proposed a model in which the early universe does not require any of these arbitrary parameters. Instead, it begins with a well-established cosmic state called De Sitter space, which is consistent with current observations of dark energy.