Quantum Physics News - SciTechDaily

Innovative Quantum Dot Monitoring: Real-Time Insights Into Nanoparticle Growth

São Paulo Research Foundation — Sat, 03 Aug 2024 23:25:07 +0000

Researchers monitored the diameter of semiconductor quantum dots in real time by observing the wavelength of the emitted light. Luminescence is the outcome of a process where an object absorbs light at one wavelength and re-emits it at a different wavelength. During this process, electrons in the material’s ground state absorb light and become excited [...]

Unlocking the Fourth Dimension: How Synthetic Dimensions Are Redefining Physics

International Society for Optics and Photonics — Thu, 25 Jul 2024 04:11:59 +0000

Researchers developed adjustable arrays of waveguides that introduce synthetic modal dimensions, enhancing the management of light within photonic systems. This innovation has potential applications ranging from mode lasing to quantum optics and data transmission. In the realm of physics, synthetic dimensions (SDs) have emerged as a cutting-edge research frontier, providing a means to investigate phenomena [...]

New Quantum “Tornado” Experiments Challenge Our Understanding of Black Holes

University of Nottingham — Wed, 24 Jul 2024 11:14:49 +0000

Researchers have created a quantum tornado in superfluid helium to simulate black hole conditions, advancing our understanding of black hole physics and the behavior of quantum fields in curved spacetimes, culminating in a unique art and science exhibition. Scientists have, for the first time, created a giant quantum vortex in superfluid helium to mimic a [...]

Solving Quantum Mysteries: Physicists Confirm Entropy Rule for Entanglement

RIKEN — Tue, 23 Jul 2024 10:18:14 +0000

New research has established a reversible framework for quantum entanglement, aligning it with the principles of thermodynamics and paving the way for improved manipulation and understanding of quantum resources. Bartosz Regula from the RIKEN Center for Quantum Computing and Ludovico Lami from the University of Amsterdam have demonstrated through probabilistic calculations the existence of an [...]

Strange Bird-Like Behavior in Atoms: Researchers Unveil New Magnetic Properties in Quantum Systems

School of Science, The University of Tokyo — Wed, 17 Jul 2024 08:22:38 +0000

Research reveals a new method of establishing order in quantum systems, potentially benefiting quantum technology advancements. Researchers Kazuaki Takasan and Kyogo Kawaguchi from the University of Tokyo, along with Kyosuke Adachi from RIKEN, Japan’s largest comprehensive research institution, have shown that ferromagnetism, an ordered state of atoms, can be induced by increasing particle motility and [...]

Unconventional Superconductivity: The Peculiar Case of Griffith Singularity

Science China Press — Tue, 16 Jul 2024 00:34:56 +0000

A new paper explores the quantum Griffith singularity in phase transitions, focusing on recent studies that could expand our understanding of high-temperature superconductivity in unconventional materials. Exploring exotic quantum phase transitions has long been a key focus in condensed matter physics. A critical phenomenon in a phase transition is determined entirely by its universality class, [...]

Pioneering Study Reveals 3D Quantum Hall Effects in Weyl Acoustic Crystals

Science China Press — Sun, 14 Jul 2024 07:21:17 +0000

A new study has demonstrated the three-dimensional quantum Hall effect in acoustic waves using a Weyl acoustic crystal, marking the first observation of one-dimensional edge states and opening avenues for advanced acoustic device development. The quantum Hall effect (QHE) stands as a landmark discovery in condensed matter physics, paving the way for the exploration of [...]

Beyond the Standard Model: New Spin-Spin-Velocity Experiments Could Rewrite Physics Textbooks

University of Science and Technology of China — Sat, 29 Jun 2024 21:10:23 +0000

Researchers have used quantum sensors to explore new particle interactions at microscale distances, presenting groundbreaking findings that expand the scope of the Standard Model in physics. A research team led by Academician Du Jiangfeng and Professor Rong Xing from the University of Science and Technology of China (USTC), part of the Chinese Academy of Sciences [...]

Quantum Surprises in Ultra-Clean Materials Redefine Metal Physics

Paul Drude Institute for Solid State Electronics — Wed, 26 Jun 2024 01:33:03 +0000

New findings suggest the need to re-evaluate current theories on electron interactions, leading to a better understanding of magnetic properties, high-temperature superconductivity, and the behavior of transparent metals. Researchers unveiled previously unobserved phenomena in an ultra-clean sample of the correlated metal SrVO3 in a paper published on June 24 in the journal Nature Communications. The [...]

String Theory Unravels New Pi Formula: A Quantum Leap in Mathematics

Indian Institute of Science (IISc) — Thu, 20 Jun 2024 13:06:17 +0000

Researchers found a new series representation for pi while exploring string theory and particle interactions. Their formula is similar to one by Madhava in the 15th century. Combining the Euler-Beta Function and Feynman Diagram, they created an efficient model, revealing this new pi representation. Theoretical work like this can eventually lead to practical applications. Discovery [...]

From Theory to Reality: Scientists Unveil Quadruple-Q Hedgehog Lattices

Waseda University — Wed, 19 Jun 2024 01:32:17 +0000

Researchers have unveiled the dynamical nature of emergent magnetic monopoles in real magnets for the first time. Magnetic monopoles are elementary particles with isolated magnetic charges in three dimensions. In other words, they behave as isolated north or south poles of a magnet. Magnetic monopoles have attracted continuous research interest since physicist Paul Dirac’s first [...]

Shattering the Limits of Classical Physics: Quantum Entanglement Measures Earth’s Rotation Like Never Before

University of Vienna — Mon, 17 Jun 2024 19:46:27 +0000

A quantum physics experiment at the University of Vienna achieved groundbreaking precision in measuring Earth’s rotation using entangled photons. The study utilizes an enhanced optical Sagnac interferometer that leverages quantum entanglement to detect rotational effects with unprecedented precision, offering potential breakthroughs in both quantum mechanics and general relativity. Pioneering Quantum Experiment A team of researchers [...]

Quantum Teleportation Just Got Real: Achieving 90% Fidelity Amidst Noise

University of Science and Technology of China — Thu, 13 Jun 2024 19:07:28 +0000

Scientists have advanced quantum teleportation by mitigating noise interference through a novel method involving hybrid entanglement, achieving close to 90% fidelity in teleporting quantum states, which could significantly enhance secure quantum communication. A research team led by Academician Guangcan Guo from the University of Science and Technology of China (USTC) of the Chinese Academy of [...]

Scientists Achieve Million-Fold Energy Enhancement in Diamond Optical Antennas

Paul Dailing, University of Chicago — Wed, 12 Jun 2024 04:26:55 +0000

Theory has become practice as new work from the University of Chicago Pritzker School of Molecular Engineering taps diamond defects’ remarkable ability to concentrate optical energy. Researchers have developed atomic antennas using germanium vacancy centers in diamonds, achieving a million-fold optical energy enhancement. This advancement allows the study of fundamental physics and opens new research [...]

Photons at the Edge of Physics Unlock Gravity’s Quantum Secrets

SPIE--International Society for Optics and Photonics — Sat, 08 Jun 2024 16:37:53 +0000

Principles behind gravity-mediated entanglement were experimentally demonstrated in a simulation using photons, providing new insights into the nature of gravity. Researchers are making significant progress in the field of quantum gravity, aiming to reconcile Einstein’s theory of gravity with quantum mechanics. Recent experiments demonstrate the principles of gravity-mediated entanglement using photons, a breakthrough in testing [...]

Quantum Pioneers: How Magnetic Quivers Are Rewriting the Rules of Particle Physics

University of Vienna — Thu, 06 Jun 2024 19:07:25 +0000

A simple concept of decay and fission of “magnetic quivers” helps to clarify complex quantum physics and mathematical structures. Researchers employed magnetic quivers to delve into the fundamentals of quantum physics, specifically through the lens of supersymmetric quantum field theories. They have provided a novel interpretation of the Higgs mechanism, illustrating how particles gain mass [...]

Exploring the Unknown: A Unique Quantum State of Matter Emerges at Columbia

Ellen Neff, Columbia University — Wed, 05 Jun 2024 08:14:01 +0000

Physicists at Columbia University have taken molecules to a new ultracold limit and created a state of matter where quantum mechanics reigns. There’s a hot new BEC in town that has nothing to do with bacon, egg, and cheese. You won’t find it at your local bodega, but in the coldest place in New York: [...]

Exploring Uncharted Territory: Physicists Unveil Infinite Possibilities of Quantum States

University of Amsterdam — Thu, 30 May 2024 10:55:16 +0000

A new method developed by Amsterdam researchers uses non-Gaussian states to efficiently describe and configure quantum spin-boson systems, promising advancements in quantum computing and sensing. Many modern quantum devices operate using groups of qubits, or spins, which have just two energy states: ‘0’ and ‘1’. However, in actual devices, these spins also interact with photons [...]

Harvard Scientists Discover Quantum Order in Chemical Chaos

Harvard University — Sun, 26 May 2024 11:50:29 +0000

Harvard researchers have shown that quantum coherence can survive chemical reactions at ultracold temperatures. Using advanced techniques, they demonstrated this with 40K87Rb bialkali molecules, suggesting potential applications in quantum information science and broader implications for understanding chemical reactions. Zoom in on a chemical reaction to the quantum level and you’ll notice that particles behave like [...]

Unlocking the Quantum Code: International Team Cracks a Long-Standing Physics Problem

University of Bonn — Tue, 21 May 2024 20:23:10 +0000

Wavefunction matching for solving quantum many-body problems. Strongly interacting systems are crucial in the fields of quantum physics and quantum chemistry. Monte Carlo simulations, a type of stochastic method, are widely used to study these systems. However, they face challenges when dealing with sign oscillations. An international team of researchers from Germany, Turkey, the USA, [...]

Beyond Hydrogen: Discovery of Tiny New Atom Tauonium With Massive Implications

Science China Press — Sun, 19 May 2024 22:32:41 +0000

Recent discoveries in quantum physics have revealed simpler atomic structures than hydrogen, involving pure electromagnetic interactions between particles like electrons and their antiparticles. This advancement has significant implications for our understanding of quantum mechanics and fundamental physics, highlighted by new methods for detecting tauonium, which could revolutionize measurements of particle physics. The hydrogen atom was [...]

Breaking Light Speed: The Quantum Tunneling Enigma

TU Darmstadt — Sat, 18 May 2024 22:18:46 +0000

In an amazing phenomenon of quantum physics known as tunneling, particles appear to move faster than the speed of light. However, physicists from Darmstadt believe that the time it takes for particles to tunnel has been measured incorrectly until now. They propose a new method to stop the speed of quantum particles. In classical physics, [...]

A New Dimension of Quantum Materials: Topological Phonons Discovered in Crystal Lattices

Elhuyar Foundation — Sat, 18 May 2024 05:28:47 +0000

Researchers from an international consortium have published a groundbreaking study that advances the field of solid-state physics. An international group of researchers has found that quantum particles, which play a key role in the vibrations of materials affecting their stability and other characteristics, can be classified through topology. Known as phonons, these particles represent the [...]

Mastering Quantum Chaos: Innovative Cooling Method Stabilizes Quantum Experiments

Vienna University of Technology — Sat, 11 May 2024 23:13:31 +0000

More stable quantum experiments are made possible at TU Wien with new tricks – by ingeniously splitting Bose-Einstein condensates Quantum experiments, whether they focus on quantum computers, quantum teleportation, or novel quantum sensors, consistently face a common challenge: quantum effects are highly fragile and easily disrupted. They are extremely sensitive to external disturbances – for [...]