URL: Quantum Physics

Quantum Physics News

Friday, July 25, 2025

• Physicists discover new state of quantum matter
  Researchers at the University of California, Irvine have discovered a new state of quantum matter. The state exists within a material that the team reports could lead to a new era of self-charging computers and ones capable of withstanding the challenges of deep space travel.
  
• New theory unifies quantum and relativistic effects in electron spin-lattice interactions
  "God does not play dice." This famous remark by Albert Einstein critiqued the probabilistic nature of quantum mechanics. Paradoxically, his theory of relativity has become an essential tool for understanding the behavior of electrons, the primary subjects of quantum mechanics.
  
• Researchers uncover a topological excitonic insulator with a tunable momentum order
  Topological materials are a class of materials that exhibit unique electronic properties at their boundary (surface in 3D materials; edge in 2D materials) that are robust against imperfections or disturbances and are markedly different from their bulk properties. In other words, these materials could be insulators (i.e., resisting the flow of electrons or heat), and yet be conducting at their boundary (i.e., allowing electrons or heat to easily flow through them).
  

Thursday, July 24, 2025

• Metasurfaces could be the next quantum information processors
  In the race toward practical quantum computers and networks, photons—fundamental particles of light—hold intriguing possibilities as fast carriers of information at room temperature.
  
• First direct images reveal atomic thermal vibrations in quantum materials
  Researchers investigating atomic-scale phenomena impacting next-generation electronic and quantum devices have captured the first microscopy images of atomic thermal vibrations, revealing a new type of motion that could reshape the design of quantum technologies and ultrathin electronics.
  
• Spin waves observed directly at nanoscale for first time
  For the first time, spin waves, also known as magnons, have been directly observed at the nanoscale. This breakthrough was made possible by combining a high–energy-resolution electron microscope with a theoretical method developed at Uppsala University. The results open exciting new opportunities for studying and controlling magnetism at the nanoscale.
  
• New method simplifies analysis of complex quantum systems with strong interactions
  A research team led by TU Darmstadt has transformed a difficult problem in quantum physics into a much simpler version through innovative reformulation—without losing any important information. The scientists have thus developed a new method for better understanding and predicting difficult quantum mechanical systems. The study is published in Physical Review Letters.
  
• Theory-guided strategy expands the scope of measurable quantum interactions
  A new theory-guided framework could help scientists probe the properties of new semiconductors for next-generation microelectronic devices, or discover materials that boost the performance of quantum computers.
  
• New scheme mitigates self-discharging in quantum batteries
  Quantum batteries (QBs) are energy storage devices that could serve as an alternative to classical batteries, potentially charging faster and enabling the extraction of more energy. In contrast with existing batteries, these batteries leverage effects rooted in quantum mechanics, such as entanglement and superposition.
  

Wednesday, July 23, 2025

• Demonstration of first antimatter quantum bit paves way for improved comparisons of matter and antimatter
  In a breakthrough for antimatter research, the BASE collaboration at CERN has kept an antiproton—the antimatter counterpart of a proton—oscillating smoothly between two different quantum states for almost a minute while trapped. The achievement, reported in a paper published today in the journal Nature, marks the first demonstration of an antimatter quantum bit, or qubit, and paves the way for substantially improved comparisons between the behavior of matter and antimatter.
  
• Optical frequency comb integration transforms absolute distance measurement precision
  The Korea Research Institute of Standards and Science has successfully developed a length measurement system that achieves a level of precision approaching the theoretical limit allowed by quantum physics.
  
• Quantum tool could lead to gamma-ray lasers and access the multiverse
  A University of Colorado Denver engineer is on the cusp of giving scientists a new tool that can help them turn sci-fi into reality.
  

Tuesday, July 22, 2025

• Gold clusters mimic atomic spin properties for scalable quantum computing applications
  The efficiency of quantum computers, sensors and other applications often relies on the properties of electrons, including how they are spinning. One of the most accurate systems for high-performance quantum applications relies on tapping into the spin properties of electrons of atoms trapped in a gas, but these systems are difficult to scale up for use in larger quantum devices like quantum computers.
  

Monday, July 21, 2025

• Model addresses heat management in high-density laser systems
  Multi-wavelength light sources are required for optical transceivers to increase data. However, scaling the laser array size increases thermal crosstalk, which may affect laser efficiency and reliability.
  
• Quantum internet moves closer as researchers teleport light-based information
  Quantum teleportation is a fascinating process that involves transferring a particle's quantum state to another distant location, without moving or detecting the particle itself. This process could be central to the realization of a so-called "quantum internet," a version of the internet that enables the safe and instant transmission of quantum information between devices within the same network.
  

Sunday, July 20, 2025

• Rabi-like splitting arises from nonlinear interactions between magnons in synthetic antiferromagnet
  Synthetic antiferromagnets are carefully engineered magnetic materials made up of alternating ferromagnetic layers with oppositely aligned magnetic moments, separated by a non-magnetic spacer. These materials can display interesting magnetization patterns, characterized by swift changes in the behavior of magnetic moments in response to external forces, such as radio frequency (RF) currents.
  

Friday, July 18, 2025

• Engineers achieve efficient integration of quantum dot lasers on silicon chiplets
  Lasers that are fabricated directly onto silicon photonic chips offer several advantages over external laser sources, such as greater scalability. Furthermore, photonic chips with these "monolithically" integrated lasers can be commercially viable if they can be manufactured in standard semiconductor foundries.
  
• Asymmetric metasurface allows precise control of photon entanglement
  A new material platform has enabled scientists to create photon pairs whose entanglement can be tuned from a layer thinner than a human hair.
  

Thursday, July 17, 2025

• Toward quantum enhanced coherent Ising machines
  The Graduate School of Information Science (GSIS) at Tohoku University, together with the Physics and Informatics (PHI) Lab at NTT Research, Inc., have jointly published a paper in the journal Quantum Science and Technology. The study involved studying a combinatorial clustering problem, a representative task in unsupervised machine learning.
  
• Human-AI teamwork uncovers hidden magnetic states in quantum spin liquids
  At the forefront of discovery, where cutting-edge scientific questions are tackled, we often don't have much data. Conversely, successful machine learning (ML) tends to rely on large, high-quality data sets for training. So how can researchers harness AI effectively to support their investigations?
  

Wednesday, July 16, 2025

• The magic of magnons: Material properties changed non-thermally using light and magnons
  Is it wizardry? Physicists at the University of Konstanz have succeeded in changing the properties of a material in a non-thermal way with the help of light and magnons. The new process is not only promising for information technology, but possibly for quantum research, too—at room temperature.
  
• 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.
  
• Chiral metasurfaces encode two images: One visible, one revealed by polarized light
  By leveraging the concept of chirality, or the difference of a shape from its mirror image, EPFL scientists have engineered an optical metasurface that controls light to yield a simple and versatile technique for secure encryption, sensing, and computing.
  

Tuesday, July 15, 2025

• The 100-year journey from quantum science to quantum technology
  You may not have realized it yet, but the United Nations has declared 2025 the International Year of Quantum Science and Technology.
  
• Next-gen rod LEDs could transform smartphones and TVs with ultra-bright and color-rich displays
  Researchers at the Hong Kong University of Science and Technology (HKUST) School of Engineering have cracked a major challenge in display technology by inventing the world's brightest and most energy efficient quantum rod LEDs (QRLEDs). These next-generation QRLEDs feature optimized deep green emission at the top of the color triangle, enabling displays with unprecedented color purity and a maximized color gamut.
  
• New research connects quantum computing power to the security of cryptographic systems
  Experts say quantum computing is the future of computers. Unlike conventional computers, quantum computers leverage the properties of quantum physics such as superposition and interference, theoretically outperforming current equipment to an exponential degree.
  

Monday, July 14, 2025

• New technique using Raman scattering can dramatically improve laser linewidth for better quantum computing
  Macquarie University researchers have demonstrated a technique to dramatically narrow the linewidth of a laser beam by a factor of over ten thousand—a discovery that could revolutionize quantum computing, atomic clocks and gravitational wave detection.
  
• Quantum networks of clocks open the door to probe how quantum theory and curved space-time intertwine
  Quantum networking is being rapidly developed world-wide. It is a key quantum technology that will enable a global quantum internet: the ability to deploy secure communication at scale, and to connect quantum computers globally. The race to realize this vision is in full swing, both on Earth and in space.
  
• World's most precise clock achieves 19-decimal accuracy with aluminum ion technology
  There's a new record holder for the most accurate clock in the world. Researchers at the National Institute of Standards and Technology (NIST) have improved their atomic clock based on a trapped aluminum ion. Part of the latest wave of optical atomic clocks, it can perform timekeeping with 19 decimal places of accuracy.
  
• Researchers demonstrate error-resistant quantum gates using exotic anyons for computation
  The quantum computing revolution draws ever nearer, but the need for a computer that makes correctable errors continues to hold it back.