Articles tagged with Photons
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.
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 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.
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 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.
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.
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.
Researchers from the University of Copenhagen have developed a new technique to store qubits of light at room temperature, a major breakthrough in quantum research. This innovation enables the storage of qubits for milliseconds instead of microseconds, saving power and resources.
Researchers designed a new type of molecular motor that can rotate in picoseconds using the power of a single photon. The motor's speed is significantly faster than existing designs, with potential applications in drug delivery, nanotechnology, and controlling biological processes.
Researchers demonstrate a novel measurement paradigm dubbed Robust Weak Measurement, measuring an anomalous weak value with a single photon detection event. The team obtains an observable with eigenvalues in the range [-7,7] and reports a weak value of the pre- and postselected system on which a single-click measurement was performed.
Scientists have successfully transferred and recovered quantum coherence from photons scattered in free-space for the first time, paving the way for new applications in quantum communication, imaging, and sensing. The novel technique uses custom hardware to maintain coherence even after scattering from a diffuse surface.
Physicist Generalized the Measurement Postulate in Quantum Mechanics, explaining state collapse and partial measurement, supported by the WISE interpretation and delayed choice experiment. The paper proposes a new understanding of wavefunction and its relation to the quantum system.
Researchers at USTC develop a multiplexed quantum repeater using absorptive quantum memories, achieving high-fidelity entanglement swapping and accelerating entanglement distribution. This breakthrough provides a feasible roadmap for practical quantum repeaters and high-speed quantum networks.
Researchers achieved scalable, telecom-heralded matter-matter entanglement between two remote, multimode and solid-state quantum memories, stored in different labs separated by 10 meters. This landmark experiment paves the way for long-distance quantum communication and operation of quantum repeaters.
Researchers have developed crystalline supermirrors with ultra-low optical absorption losses, opening up new applications in respiratory gas analysis, greenhouse gas detection, and molecular spectroscopy. These mirrors absorb less than 10 out of a million photons, significantly improving sensitivity for detecting trace gases.
LHAASO's discovery opens up an era for UHE gamma astronomy, prompting scientists to rethink high-energy particle acceleration and propagation mechanisms. The observatory detected 12 stable gamma ray sources with energies up to 1 PeV, revealing the Milky Way is full of PeVatrons.
Scientists have developed a method to shape soft X-ray pulses with high precision, using self-phase modulation in the X-ray regime. This technique has the potential to unlock new protocols for femtosecond core electrons spectroscopies.
A new infrared imager developed by researchers at the University of California San Diego converts shortwave infrared light into visible images using organic semiconductors. The device is compact, simple, and provides better image resolution than existing systems.