Quantum Mechanics
A new twist on quantum communication in fiber  PHYS.ORG · 7 hours
New research done at the University of the Witwatersrand in Johannesburg, South Africa, and Huazhang University of Science and Technology in Wuhan, China, has exciting implications for secure data transfer across optical... more
Weak-field induced nonmagnetic state in a Co-based honeycomb  Science Magazine · 7 hours
Layered honeycomb magnets are of interest as potential realizations of the Kitaev quantum spin liquid (KQSL), a quantum state with long-range spin entanglement and an exactly solvable Hamiltonian. Conventional magnetically ordered states... more
Multidimensional entanglement transport through single-mode fiber  Science Magazine · 7 hours
The global quantum network requires the distribution of entangled states over long distances, with substantial advances already demonstrated using polarization. While Hilbert spaces with higher dimensionality, e.g., spatial modes of light, allow higher information capacity per... more
A breakthrough in molding materials at the nanoscale  nanowerk · 12 hours
In a potential game-changing shift in how nano- and quantum devices are designed and manufactured, researchers have discovered that these materials are actually very conducive to nanomolding, thanks to their atoms? ability... more
On the way to quantum networks  PHYS.ORG · 12 hours
Physicists at LMU, together with colleagues at Saarland University, have successfully demonstrated the transport of an entangled state between an atom and a photon via an optic fiber over a distance of up to 20 km—thus... more
Quantum experiments explore power of light for communications, computing  SCIENCE DAILY · 1 day
Quantum researchers have conducted a series of experiments to gain a better understanding of quantum mechanics and pursue advances in quantum networking and quantum computing, which could lead to practical... more
Quantum anomalous Hall effect in intrinsic magnetic topological insulator MnBi2Te4  Science Magazine · 1 day
In a magnetic topological insulator, nontrivial band topology conspires with magnetic order to produce exotic states of matter such as quantum anomalous Hall (QAH) insulators and axion insulators.... more
Entanglement-based single-shot detection of a single magnon with a superconducting qubit  Science Magazine · 1 day
The recent development of hybrid systems based on superconducting circuits provides the possibility of engineering quantum sensors that exploit different degrees of freedom. Quantum magnonics, which... more
Quantum experiments explore power of light for communications, computing  PHYS.ORG · 1 day
A team from the Department of Energy's Oak Ridge National Laboratory has conducted a series of experiments to gain a better understanding of quantum mechanics and pursue advances in quantum... more
Borexino Detector Spots 53 Geoneutrinos  SCI-NEWS.COM · 1 day
An underground particle detector called the Borexino detector has detected 53 antielectron neutrinos emanating from the Earth, so-called geoneutrinos. Neutrinos and their antimatter counterpart, antineutrinos, are... more
Tuning of Optical absorbance of graphene quantum dots by high magnetic fields  nanowerk · 1 day
Scientists report the synthesis of graphene quantum dots under an external high magnetic field and their applications in photothermal therapy. more
Ghostly particles detected in condensates of light and matter  SCIENCE DAILY · 1 day
Discover 'ghostly' particles and quantum depletion. A new study makes the first observation of 'ghost particles' from Bose-Einstein condensates via 'quantum depletion': particles expelled by interaction-induced quantum fluctuations. more
Ghostly particles detected in condensates of light and matter  PHYS.ORG · 2 days
Bose-condensed quantum fluids are not forever. Such states include superfluids and Bose-Einstein condensates (BECs). more
Creating and observing current vortices in 2-D materials  PHYS.ORG · 3 days
Researchers at the University of Chicago and the U.S. Department of Energy's Argonne National Laboratory have developed a new method to measure how photocurrents flow in a 2-D material—a result that could... more
The quest for perfect quantum dot biomarkers  nanowerk · 3 days
Tiny nanoparticles can illuminate tissues and cells, but safer, more effective materials are needed before their mainstream application. more
New technique to study molecules and materials on quantum simulator discovered  SCIENCE DAILY · 3 days
A new technique to study the properties of molecules and materials on a quantum simulator has been discovered. more
New technique to study molecules and materials on quantum simulator discovered  PHYS.ORG · 3 days
A new technique to study the properties of molecules and materials on a quantum simulator has been discovered. more
High-precision distributed sensing using an entangled quantum network  PHYS.ORG · 3 days
Quantum-enhanced metrology has been an active area of research for several years now due to its many possible applications, ranging from atomic clocks to biological imaging. Past physics research established that having... more
Computing with spins of light  PHYS.ORG · 3 days
A laser system that generates spinning light particles could lead to the strong kind of computational power needed to solve complex biological problems. The system, which improves on previous ones, is described in the journal Quantum Science and... more
Designing lasers based on quantum physics  PHYS.ORG · 5 days
A five-country research team coordinated by Germán J. de Valcárcel Gonzalvo, Professor of Optics at the University of Valencia, has developed a new theory —the coherent master equation— that describes the behavior of pulsed lasers based... more
How sensitive can a quantum detector be?  nanowerk · 1 week
A new device measures the tiniest energies in superconducting circuits, an essential step for quantum technology. more
How sensitive can a quantum detector be?  PHYS.ORG · 1 week
Quantum physics is moving out of the laboratory and into everyday life. Despite headline results about quantum computers solving problems impossible for classical computers, technical challenges are standing in the way of getting quantum... more
Physicists Observe ‘Billions of Billions’ of Entangled Electrons  SCI-NEWS.COM · 1 week
An international team of physicists says they have observed quantum entanglement among ‘billions of billions’ of flowing electrons in thin... more
How sensitive can a quantum detector be?  SCIENCE DAILY · 1 week
Measuring the energy of quantum states requires detecting energy changes so exceptionally small they are hard to pick out from background fluctuations, like using only a thermometer to try and work out if someone... more
Study finds billions of quantum entangled electrons in 'strange metal'  PHYS.ORG · 1 week
In a new study, U.S. and Austrian physicists have observed quantum entanglement among "billions of billions" of flowing electrons in a quantum critical material. more
Billions of quantum entangled electrons found in 'strange metal'  SCIENCE DAILY · 1 week
Physicists have observed quantum entanglement among 'billions of billions' of flowing electrons in a quantum critical material. The research provides the strongest direct evidence to date of entanglement's role in... more
Singular charge fluctuations at a magnetic quantum critical point  Science Magazine · 1 week
Strange metal behavior is ubiquitous in correlated materials, ranging from cuprate superconductors to bilayer graphene, and may arise from physics beyond the quantum fluctuations of a Landau order parameter. In... more
Quantum spin liquids  Science Magazine · 1 week
Spin liquids are quantum phases of matter with a variety of unusual features arising from their topological character, including "fractionalization"—elementary excitations that behave as fractions of an electron. Although there is not yet universally accepted experimental evidence that establishes that... more
Colloidal quantum dot photodetectors can now see further than before  nanowerk · 1 week
An new study reports on the development of a colloidal quantum dot photodetector capable of detecting light in the far infrared. more
Colloidal quantum dot photodetectors can now see further than before  PHYS.ORG · 1 week
Optical sensing in the mid to long infrared (5 microns [um]) is becoming of utmost importance in different fields since it is proving to be an excellent tool... more
What's MER? A new way to measure quantum materials  SCIENCE DAILY · 1 week
Experimental physicists have combined several measurements of quantum materials into one in their ongoing quest to learn more about manipulating and controlling the behavior of them for possible applications. They... more
Quantum physics: Controlled experiment observes self-organized criticality  PHYS.ORG · 1 week
Writing in Nature, researchers describe the first-time observation of 'self-organized criticality' in a controlled laboratory experiment. Complex systems exist in mathematics and physics, but also occur in nature and society. The concept of self-organized... more
AlphaZero learns to rule the quantum world  PHYS.ORG · 1 week
The chess world was amazed when the computer algorithm AlphaZero learned, after just four hours on its own, to beat the best chess programs built on human expertise. Now a research group at Aarhus... more
Diabolical points in coupled active cavities with quantum emitters  PHYS.ORG · 1 week
Diabolical points (DPs) introduce ways to study topological phase and peculiar energy dispersion. Scientists in China and partners from the United Kingdom demonstrated DPs in strongly coupled active microdisks. A... more
Spinning quantum dots  PHYS.ORG · 1 week
The name 'quantum dots' is given to particles of semiconducting materials that are so tiny—a few nanometres in diameter—that they no longer behave quite like ordinary, macroscopic matter. Thanks to their quantum-like optical and electronic properties, they are showing promise... more
Precise measurements find a crack in universal physics  PHYS.ORG · 1 week
The concept of universal physics is intriguing, as it enables researchers to relate physical phenomena in a variety of systems, irrespective of their varying characteristics and complexities. Ultracold atomic systems are often... more
Colloidal quantum dot laser diodes are just around the corner  PHYS.ORG · 1 week
Los Alamos scientists have incorporated meticulously engineered colloidal quantum dots into a new type of light emitting diodes (LEDs) containing an integrated optical resonator, which allows them to... more
Colloidal quantum dot laser diodes are just around the corner  nanowerk · 1 week
Researchers reach a critical milestone on the path to versatile colloidal quantum dot laser diodes by successfully demonstrating a quantum dot LED that also operates as an optically... more
Colloidal quantum dot laser diodes are just around the corner  SCIENCE DAILY · 1 week
Scientists have incorporated meticulously engineered colloidal quantum dots into a new type of light emitting diodes (LEDs) containing an integrated optical resonator, which allows them to function as... more
New classes of topological crystalline insulators having surface rotation anomaly  PHYS.ORG · 1 week
In a new report on Science Advances, Chen Fang and Liang Fu from the Beijing National Laboratory for Condensed Matter Physics in China, Kavli Institute for Theoretical Sciences... more
How to verify that quantum chips are computing correctly  PHYS.ORG · 2 weeks
In a step toward practical quantum computing, researchers from MIT, Google, and elsewhere have designed a system that can verify when quantum chips have accurately performed complex computations that classical... more
Reliable and extremely fast quantum calculations with germanium transistors  PHYS.ORG · 2 weeks
Transistors based on germanium can perform calculations for future quantum computers. This discovery by the team of Menno Veldhorst is reported in Nature. more
New quantum loop provides testbed for quantum communication technology  PHYS.ORG · 2 weeks
Scientists from Argonne National Laboratory and the University of Chicago launched a new testbed for quantum communication experiments from Argonne last week. more
Influential electrons? Physicists uncover a quantum relationship  SCIENCE DAILY · 2 weeks
A team of physicists has mapped how electron energies vary from region to region in a particular quantum state with unprecedented clarity. This understanding reveals an underlying mechanism by which electrons influence one another,... more
Tuning optical resonators gives researchers control over transparency  PHYS.ORG · 2 weeks
In the quantum realm, under some circumstances and with the right interference patterns, light can pass through opaque media. more
Influential electrons? Physicists uncover a quantum relationship  PHYS.ORG · 2 weeks
A team of physicists has mapped how electron energies vary from region to region in a particular quantum state with unprecedented clarity. This understanding reveals an underlying mechanism by which electrons influence one another,... more
How to verify that quantum chips are computing correctly  MIT · 2 weeks
A new method determines whether circuits are accurately executing complex operations that classical computers can’t tackle. more
Memory storage for super cold computing  PHYS.ORG · 2 weeks
Scientists at the Department of Energy's Oak Ridge National Laboratory have experimentally demonstrated a novel cryogenic, or low temperature, memory cell circuit design based on coupled arrays of Josephson junctions, a technology that may be faster... more
Divorce in a one-dimensional world  PHYS.ORG · 2 weeks
In everyday objects, there is no left without right or front without back. Just as inseparable seem to be the electron's electric charge and its "spin." But in a strictly one-dimensional quantum world, both quantum properties are separable... more
Divorce in a one-dimensional world  nanowerk · 2 weeks
In a strictly one-dimensional quantum world, an electron's electric charge and its 'spin' are separable from each other. This fifty-year-old prediction has now been confirmed by an experiment. more
Laser physics: At the pulse of a light wave  PHYS.ORG · 2 weeks
Physicists in the Laboratory for Attosecond Physics at Ludwig-Maximilians-Universitaet (LMU) in Munich and at the Max Planck Institute for Quantum Optics (MPQ) have developed a novel type of detector that... more
New approach for controlling qubits via microwave pulses reduces error rates and increases efficiency  PHYS.ORG · 2 weeks
A functional quantum computer is one of the most intriguing promises of quantum technology. With significantly increased computing power, quantum... more
10 new bird taxa discovered in islands of Wallacea  PHYS.ORG · 2 weeks
Birds are the best known class of animals, and since 1999, only five or six new species have been described each year on average. Recently, a joint research team from... more
Unexpected twist in a quantum system  PHYS.ORG · 2 weeks
Physicists at ETH Zurich have observed a surprising twist in a quantum system caused by the interplay between energy dissipation and coherent quantum dynamics. To explain it, they found a concrete analogy to mechanics. more
Researchers discover new building blocks of catalyst zeolite nanopores  nanowerk · 2 weeks
Scientists used systematic analyses and Raman spectroscopy, plus quantum mechanical modeling, to discover new nano-scale building blocks they call 'tricyclic bridges', to help explain zeolites' porous structures and their dynamical... more
Observation of an isomerizing double-well quantum system in the condensed phase  Science Magazine · 2 weeks
Molecular isomerization fundamentally involves quantum states bound within a potential energy function with multiple minima. For isolated gas-phase molecules, eigenstates well above the isomerization saddle points... more
Time-resolved observation of spin-charge deconfinement in fermionic Hubbard chains  Science Magazine · 2 weeks
Elementary particles carry several quantum numbers, such as charge and spin. However, in an ensemble of strongly interacting particles, the emerging degrees of freedom can fundamentally differ from those of... more
Intrinsic quantized anomalous Hall effect in a moiré heterostructure  PHYS.ORG · 2 weeks
The quantum anomalous Hall (QAH) effect can combine topology and magnetism to produce precisely quantized Hall resistance at zero magnetic field (an environment carefully screened from magnetic fields). In a... more
A neural network as an anchor point  PHYS.ORG · 2 weeks
Quantum mechanics is a well-established theory, but at a macroscopic level it leads to intractable contradictions. Now ETH physicists are proposing to resolve the problem with the aid of neural networks. more
Neutrons 'break the ice' for exploring fundamental physics in frozen water  PHYS.ORG · 2 weeks
The ice we blend into our frozen drinks is a complicated compound, riddled with strange molecular inconsistencies scientists still struggle to understand. Exploring the physics behind... more
The case of the elusive Majorana: The so-called 'angel particle' is still a mystery  PHYS.ORG · 3 weeks
A 2017 report of the discovery of a particular kind of Majorana fermion—the chiral Majorana fermion, referred to as the... more
Superconductor or not? Exploring the identity crisis of this weird quantum material  PHYS.ORG · 3 weeks
Northeastern researchers have used a powerful computer model to probe a puzzling class of copper-based materials that can be turned into superconductors. Their findings... more
The Quantum World May Have a Favorite Flavor, Tantalizing Results Suggest  LIVE SCIENCE · 3 weeks
The world of the teensy-tiny, the quantum realm, could have a favorite flavor. Here's why that's a big deal. more
A quantum breakthrough brings a technique from astronomy to the nano-scale  PHYS.ORG · 3 weeks
Researchers at Columbia University and University of California, San Diego, have introduced a novel "multi-messenger" approach to quantum physics that signifies a technological leap in how... more
Researchers advance performance benchmark for quantum computers  PHYS.ORG · 3 weeks
Researchers at the Department of Energy's Oak Ridge National Laboratory have developed a quantum chemistry simulation benchmark to evaluate the performance of quantum devices and guide the development of applications for future quantum computers. more
Absence of evidence for chiral Majorana modes in quantum anomalous Hall-superconductor devices  Science Magazine · 3 weeks
A quantum anomalous Hall (QAH) insulator coupled to an s-wave superconductor is predicted to harbor chiral Majorana modes. A recent experiment interprets the half-quantized... more
Rewriting quantum mechanics in their spare time  PHYS.ORG · 3 weeks
As students, Jussi Lindgren and Jukka Liukkonen had found one element of their quantum mechanics lectures unsatisfying. "When we were taught physics, there were some fundamental elements you were told were true, and you... more
Nearly quantized conductance plateau of vortex mode in an iron-based superconductor  PHYS.ORG · 4 weeks
When a semiconducting nanowire is coupled to a superconductor, it can be tuned to topological quantum states thought to host localized quasiparticles known as Majorana Zero... more
Soundwaves carry information between quantum systems  nanowerk · 4 weeks
Researchers invented a unique way for different types of quantum technology to 'talk' to each other using sound. The study provides a step towards bringing quantum technology closer to reality. more
The experimental demonstration of a spin quantum heat engine  PHYS.ORG · 4 weeks
The theoretical notion of a 'quantum heat engine' has been around for several decades. It was first introduced around sixty years ago by Scovil and Schulz-DuBois, two physicists at Bell... more
Device splits and recombines superconducting electron pairs  PHYS.ORG · 4 weeks
A device that can separate and recombine pairs of electrons may offer a way to study an unusual form of superconductivity, according to RIKEN physicists. This superconducting state would involve exotic particles called Majorana... more
Nanowire device splits and recombines superconducting electron pairs  nanowerk · 4 weeks
A nanowire device could help explore a form of superconductivity that features exotic particles with potential uses in quantum computing. more
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