URL: Quantum Physics

Quantum Physics News

Thursday, April 25, 2024

• Demonstration of heralded three-photon entanglement on a photonic chip
  Photonic quantum computers are computational tools that leverage quantum physics and utilize particles of light (i.e., photons) as units of information processing. These computers could eventually outperform conventional quantum computers in terms of speed, while also transmitting information across longer distances.
  

Wednesday, April 24, 2024

• Scientists tune the entanglement structure in an array of qubits
  Entanglement is a form of correlation between quantum objects, such as particles at the atomic scale. The laws of classical physics cannot explain this uniquely quantum phenomenon, yet it is one of the properties that explain the macroscopic behavior of quantum systems.
  
• Lead-vacancy centers in diamond as building blocks for large-scale quantum networks
  Much like how electric circuits use components to control electronic signals, quantum networks rely on special components and nodes to transfer quantum information between different points, forming the foundation for building quantum systems.
  
• Light stands still in a deformed crystal
  AMOLF researchers, in collaboration with Delft University of Technology, have succeeded in bringing light waves to a halt by deforming the two-dimensional photonic crystal that contains them. The researchers show that even a subtle deformation can have a substantial effect on photons in the crystal. This resembles the effect that a magnetic field has on electrons.
  
• Scientists at the MAJORANA Collaboration look for rule-violating electrons
  In a new study published inNature Physics, scientists at the MAJORANA Collaboration have tested the stringency of charge conservation and Pauli's exclusion principles using underground detectors. Alessio Porcelli has published a News & Views piece on the research in the same journal.
  

Tuesday, April 23, 2024

• Tailoring electron vortex beams with customizable intensity patterns by electron diffraction holography
  A new research study from Opto-Electronic Advances discusses tailoring electron vortex beams with customizable intensity patterns by electron diffraction holography.
  
• The big quantum chill: Scientists modify common lab refrigerator to cool faster with less energy
  By modifying a refrigerator commonly used in both research and industry, researchers at the National Institute of Standards and Technology (NIST) have drastically reduced the time and energy required to cool materials to within a few degrees above absolute zero.
  
• Manipulating the geometry of the 'electron universe' in magnets
  Researchers at Tohoku University and the Japan Atomic Energy Agency have developed fundamental experiments and theories to manipulate the geometry of the "electron universe," which describes the structure of electronic quantum states in a manner mathematically similar to the actual universe, within a magnetic material under ambient conditions.
  
• Tunable quantum anomalous Hall effects in van der Waals heterostructures
  The quantum anomalous Hall effect (QAHE) has unique advantages in topotronic applications, but realizing the QAHE with tunable magnetic and topological properties for building functional devices is still a key scientific challenge. Through first-principles calculations, researchers have predicted a candidate material that meets these requirements.
  

Monday, April 22, 2024

• Announcing the birth of QUIONE, a unique analog quantum processor
  Quantum physics requires high-precision sensing techniques to delve deeper into the microscopic properties of materials. From the analog quantum processors that have emerged recently, quantum-gas microscopes have proven to be powerful tools for understanding quantum systems at the atomic level. These devices produce images of quantum gases with very high resolution: They allow individual atoms to be detected.
  
• Steering toward quantum simulation at scale
  Researchers simulated a key quantum state at one of the largest scales reported, with support from the Quantum Computing User Program, or QCUP, at the Department of Energy's Oak Ridge National Laboratory.
  
• Superradiant atoms could push the boundaries of how precisely time can be measured
  Superradiant atoms can help us measure time more precisely than ever. In a recent study, researchers from the University of Copenhagen present a new method for measuring the time interval, the second, mitigating some of the limitations that today's most advanced atomic clocks encounter. The result could have broad implications in areas such as space travel, volcanic eruptions and GPS systems.
  
• Bounding the amount of entanglement from witness operators
  A team of researchers has proposed an approach to quantify entanglement using the standard entanglement witness procedure under three common experimental scenarios. Their work is published in Physical Review Letters.
  
• Springing simulations forward with quantum computing
  Though "coupled oscillations" may not sound familiar, they are everywhere in nature. The term "coupled harmonic oscillators" describes interacting systems of masses and springs, but their utility in science and engineering does not end there. They describe mechanical systems like bridges, the bonds between atoms, and even gravitational tidal effects between the Earth and the moon. Understanding such problems allows us to probe a correspondingly huge range of systems from chemistry to engineering to materials science and beyond.
  

Friday, April 19, 2024

• Compact quantum light processing: New findings lead to advances in optical quantum computing
  An international collaboration of researchers, led by Philip Walther at University of Vienna, have achieved a significant breakthrough in quantum technology, with the successful demonstration of quantum interference among several single photons using a novel resource-efficient platform. The work published in Science Advances represents a notable advancement in optical quantum computing that paves the way for more scalable quantum technologies.
  

Thursday, April 18, 2024

• Access to burgeoning quantum technology field could be widened by educational model
  Quantum technology is based on the engineering of devices that make use of the quantum properties of matter. One of the most prominent avenues of this technology is quantum computing, which may be able to leverage quantum bits (qubits) to perform calculations more efficiently than classical computers. Technology with this "quantum advantage" will also operate in the background of our lives, providing ultra-secure communications and high-precision sensors and clocks.
  
• Research reveals a surprising topological reversal in quantum systems
  In principle, one shouldn't compare apples to oranges. However, in topology, which is a branch of mathematics, one must do just that. Apples and oranges, it turns out, are said to be topologically the same since they both lack a hole—in contrast to doughnuts or coffee cups, for instance, which both have one (the handle in the case of the cup), and thus are topologically equal.
  

Wednesday, April 17, 2024

• A new spin on materials analysis: Benefits of probing electron spin states at much higher resolution and efficiency
  Electron spin states can now be probed at much higher resolution and more efficiently, opening new opportunities in materials analysis and data processing technologies.
  
• Beyond equilibrium: Scientists investigate Floquet Fermi liquids
  Researchers from Germany and Singapore have studied a non-equilibrium state of Fermi liquids called the Floquet Fermi liquid (FFL), which is formed when Fermi liquids are subjected to a periodic driving force and kept in contact with a fermionic bath.
  

Tuesday, April 16, 2024

• Crucial connection for 'quantum internet' made for the first time
  Researchers have produced, stored, and retrieved quantum information for the first time, a critical step in quantum networking.
  
• CMS collaboration releases Higgs boson discovery data to the public
  As part of its continued commitment to making its science fully open, the CMS collaboration has just publicly released the combination of CMS measurements that contributed to establishing the discovery of the Higgs boson in 2012.
  

Monday, April 15, 2024

• Researchers control quantum properties of 2D materials with tailored light
  A team of scientists has developed a method that harnesses the structure of light to twist and tweak the properties of quantum materials. Their results, published today in Nature, pave the way for advancements in next generation quantum electronics, quantum computing and information technology.
  
• Internet can achieve quantum speed with light saved as sound
  Researchers at the University of Copenhagen's Niels Bohr Institute have developed a new way to create quantum memory: A small drum can store data sent with light in its sonic vibrations, and then forward the data with new light sources when needed again. The results demonstrate that mechanical memory for quantum data could be the strategy that paves the way for an ultra-secure internet with incredible speeds.
  
• Machine learning could help reveal undiscovered particles within data from the Large Hadron Collider
  Scientists used a neural network, a type of brain-inspired machine learning algorithm, to sift through large volumes of particle collision data. Particle physicists are tasked with mining this massive and growing store of collision data for evidence of undiscovered particles. In particular, they're searching for particles not included in the Standard Model of particle physics, our current understanding of the universe's makeup that scientists suspect is incomplete.
  
• A balanced quantum Hall resistor provides a new measurement method
  Researchers at the University of Würzburg have developed a method that can improve the performance of quantum resistance standards. It's based on a quantum phenomenon called Quantum Anomalous Hall effect.
  
• Combating disruptive 'noise' in quantum communication
  In a significant milestone for quantum communication technology, an experiment has demonstrated how networks can be leveraged to combat disruptive 'noise' in quantum communications.
  

Saturday, April 13, 2024

• The experimental demonstration of a verifiable blind quantum computing protocol
  Quantum computers, systems that process and store information leveraging quantum mechanical phenomena, could eventually outperform classical computers on numerous tasks. Among other things, these computers could allow researchers to tackle complex optimization problems, speed up drug discovery and better protect users against cyber-security threats.
  

Friday, April 12, 2024

• Searching for new asymmetry between matter and antimatter
  Once a particle of matter, always a particle of matter. Or not. Thanks to a quirk of quantum physics, four known particles made up of two different quarks—such as the electrically neutral D meson composed of a charm quark and an up antiquark—can spontaneously oscillate into their antimatter partners and vice versa.
  

Thursday, April 11, 2024

• Peter Higgs transformed what we know about the building blocks of the universe
  Peter Higgs, who gave his name to the subatomic particle known as the Higgs boson, has died aged 94. He was always a modest man, especially when considering that he was one of the greats of particle physics—the area of science concerned with the building blocks of matter.
  
• New advances promise secure quantum computing at home
  The full power of next-generation quantum computing could soon be harnessed by millions of individuals and companies, thanks to a breakthrough by scientists at Oxford University Physics guaranteeing security and privacy. This advance promises to unlock the transformative potential of cloud-based quantum computing and is detailed in a new study published in Physical Review Letters. The paper is titled "Verifiable blind quantum computing with trapped ions and single photons."