Articles tagged with Photons
Researchers at the University of Vienna have created a quantum memristor that combines artificial intelligence and quantum computing. The device uses single photons to achieve memristive behavior, which can be used for learning on both classical and quantum tasks.
Researchers have found direct evidence of strong electron correlation in ABC trilayer graphene, a two-dimensional material that can switch between metal, insulator, and superconductor states. The discovery provides insight into the underlying physics driving these switchable materials.
A team led by Prof. Dr. Giuseppe Sansone used attosecond pulses to investigate the motion of electrons after photon absorption, finding they experience a complex landscape with potential peaks and valleys. This approach can be extended to more complex molecular systems, providing unprecedented temporal resolution.
Researchers from the University of Würzburg have discovered new states in 2D materials by exploring their interactions with phonons. This breakthrough enables the creation of hybridized exciton-photon-phonon states, which could lead to room-temperature Bose-Einstein condensation and polariton lasing.
Researchers developed mpH^2 MM to analyze fluctuating molecular signals, enabling predictions of shape changes. The framework was applied to DNA and proteins, revealing distinct mechanisms for binding molecules.
Researchers used a COLTRIMS reaction microscope to determine the duration of an electron's release after photon absorption. The study found that the emission time depends on the direction and velocity of the electron, revealing a complex interplay between quantum physics and molecular dynamics.
A new simulation suggests that energy released near a black hole's event horizon during magnetic field line reconnection powers the intense flares. The process involves interactions between the magnetic field and material falling into the black hole, releasing hot plasma particles that radiate away as photons.
Researchers review current research on 2D materials, highlighting their potential for quantum light sources and integrated circuits. The scientists also discuss recent advances in hybrid devices and scalable quantum photonic technologies.
A new wearable headset, Kernel Flow, monitors brain activity using time-domain fNIRS. The system can record high-resolution brain signals from across the brain with performance similar to conventional systems.
Scientists from Tampere University and National Research Council of Canada develop a technique using two-photon N00N states to create entangled photon pairs with improved measurement precision. This allows for spatially structured quantum states of light that can go beyond classical limits in rotation estimation.
Researchers at GIST used ultrafast X-ray pulses to study warm dense copper electrons, revealing that bonds harden before melting. The findings could improve understanding of extraordinary material properties and their underlying mechanisms.
Paderborn University to establish a three-node quantum network in real urban environment, utilizing standardized equipment and protocols. The initiative aims to enhance efficiency and stability of quantum communication systems.
A team of researchers demonstrates an adaptive optimization protocol that can engineer arbitrary high-dimensional quantum states, overcoming limitations due to noise and experimental imperfections. The protocol uses measured agreement between produced and target state to tune experimental parameters.
Aston University's Aston Institute of Photonic Technologies has received a £100,000 grant to support its research in food and agri-tech. The new equipment will enable the development of cost-effective photonic technology for quality control in food processing and manufacturing.
Researchers from Münster, Bayreuth, and Berlin have proposed a new way of preparing quantum systems to generate single photon states. The proposed method uses a swing-up process in the quantum system to separate generated photons from exciting laser pulses, which is promising for applications.
A new class of faster and more powerful semiconductors is being developed by UMass Lowell scientists to enhance wireless communication and digital imaging. The $1.7M NSF project aims to improve infrared optoelectronic devices, enabling better intracellular imaging, night vision, and quantum and 5G communication.
Researchers predict existence of split photons, a new phase of light that behaves like a coin with two distinct halves. The finding advances fundamental understanding of light and its behavior, challenging long-held beliefs.
A team of researchers at Imperial College London has generated and observed non-Gaussian states of high-frequency sound waves comprising over a trillion atoms. This breakthrough makes important strides towards generating macroscopic quantum states that will enable future quantum internet components to be developed.
Theorists at the University of Chicago have developed a new scheme for trapping single photons in a cavity, creating a 'wall' that prevents further photons from entering. This mechanism allows two sources to emit selected photons into a cavity before destructive interference cancels them out.
Scientists at Paderborn University have demonstrated the spatial confinement of a light wave to a point smaller than the wavelength in a topological photonic crystal. This finding enables novel unidirectional waveguides that transmit light without back reflection, even with arbitrarily large disorder.
Researchers at Stanford University have proposed a new design for photonic quantum computers that can operate at room temperature and require fewer components. The proposed design uses a laser to manipulate an atom, which then modifies the state of photons via quantum teleportation, enabling the creation of complex calculations.
A team led by Prof. Dr. Maria Hoflund developed a method to focus broadband XUV radiation with a high demagnification factor, enabling the creation of high-intensity XUV pulses with attosecond pulse duration.
Scientists discover a promising approach to creating solid materials for photon upconversion, which can transform wasted long-wavelength light into more useful shorter wavelength light. The new van der Waals crystal solution exhibits outstanding performance and efficiency, enabling the development of novel photonic technologies.
Researchers at Columbia University have developed a compact and power-efficient phase modulator that can control the phase of visible light waves. This breakthrough enables large-scale integration of devices for applications such as chip-scale LIDAR, AR/VR goggles, and quantum information processing chips.
A new imaging method measures individual photons, greatly reducing interference and improving spatial resolution by three times. The technology could also reduce radiation exposure during x-ray imaging, making it ideal for medical applications.
Researchers at JILA have developed a technique to extend the excited-state lifetime of atoms in a Fermi sea, allowing for improved quantum communication networks and atomic clocks. By manipulating the Pauli exclusion principle, they achieved a significant delay in spontaneous decay.
The new quantum microscope uses entangled photons to create interference patterns on the sample, reducing noise levels and increasing sensitivity by over 25%. This allows for high-resolution imaging of transparent cells without damaging them.
MIT physicists have observed the Pauli exclusion principle suppressing how a cloud of ultracold, superdense atoms scatter light. The effect, known as Pauli blocking, makes the atoms effectively transparent and invisible to photons.
A team of researchers has developed a simple and efficient method of quantum encryption using single photons, which can detect any attempt to hack the message. The breakthrough brings us closer to securing our data against quantum computers' potential attacks.
Researchers from Germany, China, Israel and Vietnam cracked the code on attosecond collision dynamics in solids. By analyzing high harmonic generation (HHG) in solids, they unveiled the structure and dynamics of information encoded within the band structure.
Researchers at Stanford University have developed a new device that brings sound to quantum science experiments, opening up new possibilities for studying solids and phases of matter. The device uses a precise cavity to hold an optical lattice of atoms, which vibrates at around 1 kHz, producing phonons - the building blocks of sound.
Researchers demonstrated Young's experiment for photons in reciprocal space, creating an interference pattern of light polarization with circular polarized stripes. The observation coincided with the 100th anniversary of spin discovery and showed a classic entanglement of two degrees of freedom - direction and polarization of light.
Paxlovid demonstrates significant efficacy against SARS-CoV-2 virus, reducing hospitalization and death risks in adult patients by up to 89%. The treatment's development involved cutting-edge X-ray technology from the Advanced Photon Source.
Scientists use squeezed light to improve the sensitivity of a magnetometer, overcoming shot noise limitations. By evading measurement back-action, they enhance the magnetometer's performance and detect smaller changes in magnetic fields.
Researchers used reinforcement learning to control a small particle moving in a double-well system, achieving accurate control despite noisy measurements. The method shows promise for future applications in quantum technologies and AI.
Researchers have developed a superconducting silicon-photonic chip for quantum communication, enabling optimal Bell-state measurement of time-bin encoded qubits. This breakthrough enhances the key rate of secure quantum communication and removes detector side-channel attacks, significantly increasing security.
Researchers at the University of Rochester have generated an incredibly large bandwidth using a thin-film nanophotonic device, overcoming limitations of existing devices. The breakthrough could advance metrology, sensing, and quantum networks.
Researchers at EPFL have created a topological insulator that allows microwave photons to survive unprecedented levels of disorder and obstacles. This discovery holds great promise for advances in science and technology, particularly in the development of next-generation communication systems and photonic processors.
Researchers at RHIC's PHENIX Collaboration report new data on direct photons, revealing the potential to study gluons' transverse motion within protons. The measurements are 50 times more precise than previous data and validate the approach for future studies of proton spin and structure.
Scientists from Skoltech and the University of Southampton created an all-optical lattice that houses polaritons, quasiparticles with half-light and half-matter properties. They demonstrated breakthrough results for condensed matter physics and flatband engineering.
A team of researchers at Bristol's Quantum Engineering and Technology Labs has developed a silicon photonic chip that can protect quantum bits from errors using photons. This breakthrough could lead to the creation of more powerful quantum computers by reducing the fragility of qubits.
A team at TU Wien developed a new quantum transmission protocol using eight different paths for each photon, generating a record-breaking entanglement-based quantum key. This protocol is more robust against interference and allows for faster data transmission.
A new optical switch created by an international team could replace electronic transistors in computers, manipulating photons instead of electrons. The device requires no cooling and is fast, with operations per second between 100 and 1,000 times faster than current commercial transistors.
Researchers at Dartmouth College have developed a theory that produces and detects light in a vacuum, challenging classical physics. The experiment uses an accelerating diamond membrane to create photons, which are then amplified by multiple photon detectors.
A new approach to generating quantum-entangled photon pairs uses nonlinear metasurfaces to enhance and tailor photon emissions. The researchers achieved a five-order-of-magnitude increase in the brightness of entangled photons, with a highly configurable platform that can control entanglement and direction.
A Russian-U.K. research team has proposed a theoretical description for the new effect of quantum wave mixing involving classical and nonclassical states of microwave radiation. The study builds on earlier experiments on artificial atoms, which serve as qubits for quantum computers and probes fundamental laws of nature.
Researchers from Paderborn University create a simple integrated quantum network using thin layers of lithium niobate to demonstrate large-scale functionalities. The project aims to develop scalable quantum components with industrial application potential.
Researchers at Berkeley Lab and UC Berkeley capture the first direct image of quantum spin liquid particles, called spinons and chargons. The discovery advances research on quantum computing and exotic superconductivity.
Researchers developed a novel detector system using superconducting nanowire single-photon detectors to measure cerebral blood flow. The SNSPD-DCS system showed significant improvement in signal-to-noise ratio compared to conventional SPAD-based DCS, allowing for clearer detection of arterial pulses.
Researchers at USTC achieved a significant reduction in noise by 670 times compared to previous strategies, enabling solid quantum memory with high fidelity. The new protocol, NLPE, uses double rephasing to manipulate spontaneous noise emission and separate the signal from the noise.
Researchers at GIST develop a non-contact, nondestructive approach to characterize crystal structures in thin films, shedding light on surface symmetries in SrRuO3. The technique offers a platform for structural characterization of surfaces and interfaces using optical techniques.
Exciton-polaritons exhibit non-linear effects, including Bose-Einstein condensation and polariton lasing without occupation inversion. The study reveals energy-degenerate parametric scattering of polaritons and opens up new avenues for research on multi-level polariton systems.
A team of scientists proposes a way to control all properties of photonic qubits using modulated quantum metasurfaces. This technology could enable secure communication, sensing and imaging, as well as harnessing energy from photons.
Scientists at Argonne National Laboratory have devised a unique means of achieving effective gate operation with electromagnonics. They can rapidly switch between magnonic and photonic states over a period shorter than the magnon or photon lifetimes, enabling real-time control of information transfer.
The Large High Altitude Air Shower Observatory (LHAASO) has accurately measured the brightness of the Crab Nebula over a record-breaking energy range. The measurement confirms past findings and provides direct evidence for the acceleration of high-energy electrons in the nebula.
Research from Washington University in St. Louis has found an efficient two-bit quantum logic gate that uses a new form of light, increasing efficiency by orders of magnitude. The discovery was made possible by the unique features of measurement and the existence of photonic dimers.
Scientists have developed a new scheme to generate intense XUV pulses using near-infrared lasers, shrinking the need for large laboratory facilities. The setup produces high-intensity XUV pulses with potential applications in attosecond-pump attosecond-probe spectroscopy and nanoscale imaging.
Scientists from NUST MISIS and MIPT create a system with ultra-strong photon-to-magnon coupling, enabling efficient information exchange between hybrid quantum systems. This breakthrough reduces the electromagnetic resonator size by hundreds of times, increasing photon-magnon interaction by several times.
Physicists used attosecond pulses to study tungsten crystals' photoelectron emission dynamics. The results show that electrons from neighboring energy states in the valence band differ by tens of attoseconds in their response times.
Researchers at MIT have cooled a large, human-scale object to close to its motional ground state, enabling the study of gravity's effects on massive quantum objects. The object, comprising nearly 1 octillion atoms, was cooled to 77 nanokelvins using LIGO's precise motion-measuring capabilities.