Articles tagged with Photons
Researchers have developed a new approach to see-through displays for augmented reality smart glasses. The design projects images onto the eye using photons and holographic optical elements to form letters and words.
Researchers at HZB integrated a thin layer of singlet fission-capable tetracene crystals into a silicon solar cell, successfully generating two pairs of charge carriers simultaneously. This breakthrough increases the quantum efficiency to 200 percent and brings the theoretical efficiency limit closer to 40 percent.
ICESat-2 successfully fired its laser for the first time, sending photons to measure Antarctic height and detecting small changes in planet's ice sheets, glaciers, and sea ice. The mission will continue with procedures to optimize the instrument, aiming to start getting excellent science-quality data within a month after launch.
Researchers have found a new source of high-energy photons in the cosmos: a microquasar located in our galaxy. The gamma rays emitted by this system are among the most energetic ever observed and were detected using the High-Altitude Water Cherenkov Gamma-Ray Observatory.
Astrophysicists use 3D simulations to explain how luminous blue variables launch material into space through intense light and turbulent motion. The study sheds light on the violent mood swings of rare, massive stars that can shed billions of metric tons of material annually.
A team of scientists, led by Dr. Shen, is working on developing a two-photon controlled-phase logic gate, an essential building block for optical quantum information. The team aims to overcome the difficulty in manipulating photons and create a fundamental component for photonic quantum computation.
Researchers at University of Turku and University of Science and Technology of China have successfully controlled the flow of quantum information into the environment, preventing its disappearance. This breakthrough has significant implications for basic research and the development of quantum technologies.
PySight improves rapid 2D and 3D imaging of the brain with high spatiotemporal resolution, enabling scientists to better understand brain dynamics and discover new treatments. The open-source software integrates with state-of-the-art hardware, overcoming technical barriers to continuous 3D imaging.
Researchers created a system with just seven photons and found that phase transitions occur in these small systems, allowing for the study of quantum properties. This discovery has potential applications in measurement or sensing, as well as exploring properties at the smallest scale when phase transitions occur.
Researchers at TU Wien have measured the phenomenon of superradiance in tiny diamond defects, where one atom causes other atoms to emit energy as light. This creates an intense flash of quantum light that happens within 100 nanoseconds.
Scientists at the Weizmann Institute of Science have successfully demonstrated a logic gate that enables the exchange of information between photons and atoms, a breakthrough necessary for scaling up quantum computers. This achievement paves the way for the development of more powerful quantum computing systems.
Qrypt has licensed a novel cybersecurity technology from Oak Ridge National Laboratory to fortify encryption methods. The company will incorporate the quantum random number generator into its platform, using unique and unpredictable encryption keys to create virtually impenetrable communications.
The team developed a multi-degree-of-freedom multiplexed solid-state quantum memory with high multimode capacity and demonstrated photon pulse operation functions with time and frequency DOFs. The device enables coherent manipulation of quantum states and can serve as a quantum mode converter with high fidelity.
A University of Queensland researcher led an international study to develop a programmable machine that can accomplish various tasks using reprogrammed settings, resulting in exponential changes.
Researchers used light from distant quasars to determine measurements on pairs of entangled photons, finding correlations that exceeded Bell's original limit for a classically based mechanism. This strengthens the case for quantum entanglement and restricts options for the freedom-of-choice loophole.
Researchers from the Institute of Physical Chemistry of Poland have developed new substrates for Surface Enhanced Raman Spectroscopy (SERS) that guarantee signal enhancement and repeatability. These substrates enable the routine detection of small amounts of chemical compounds, including organic molecules and specific bacteria.
Researchers propose a refined approximation of the photo-excitation equation that describes the effect of photons on rhodopsin protein in eyes. The study has implications for other molecules, like azobenzene, and demonstrates tunnelling process to populate excited states.
Researchers have discovered that using information to extract work on a quantum scale is possible, but it comes with a catch: some information may be lost in the process. Quantum backaction allows researchers to measure particles without fully collapsing their superposition states, resulting in negative information.
Researchers at UNIGE have discovered ytterbium, a rare earth element that can store and protect quantum information even at high frequencies. The material's properties make it an ideal candidate for future quantum networks, where the aim is to propagate signals over long distances by acting as repeaters.
Researchers at the University of Colorado Boulder and NIST have developed a device that converts microwave energy into laser light, crucial for sending quantum signals. The team's innovation could one day enable huge networks of quantum computers to communicate efficiently.
The team has generated rapid single-photon light pulses, which cannot be intercepted without disturbing them. This enables secure data transfer using light passed along fibre optic cables, making it ideal for environments where security is paramount.
A Rochester Institute of Technology researcher has developed a new solar sailing technology using diffractive metafilm materials that could propel spacecraft more efficiently and reduce overheating. The new material can steer reflected or transmitted photons for near-Earth, interplanetary, and interstellar space travel.
Astrophysicists have localized a high-energy cosmic neutrino originating outside the Milky Way to a blazar in the Orion constellation using MAGIC telescopes and IceCube detector. The observation provides insight into the origin of cosmic rays, which are believed to be accelerated by protons in the blazar's jets.
Princeton researchers successfully implant diamonds with silicon vacancies to create a quantum repeater, enabling the transmission of fragile quantum information over long distances. This breakthrough could lead to ultra-secure communication networks and new quantum computers solving complex problems.
Researchers have demonstrated the first single-photon transistor using a semiconductor chip, paving the way for photon-based computing. The device can process 10 billion photonic qubits per second and is compact enough to fit inside a grain of salt.
Researchers at FAU and ANSER Center investigate singlet fission mechanism, gaining insights into its potential for increasing solar cell efficiency. They find that SF efficiency correlates with the coupling of molecular sub-units, providing a promising approach to boost performance.
Boson sampling with photons faces major obstacle due to unavoidable photon loss, but researchers from USTC have confirmed experimentally that lost photons still produce useful output. This discovery allows for exponentially faster sampling rates and brings demonstration of quantum supremacy closer to reality.
A team of physicists has measured a tiny time difference in the ejection of an electron from a molecule depending on its position. The researchers used attosecond laser pulses to study the photoelectric effect in carbon monoxide molecules, achieving precise measurements of the Wigner time delay and electron localization.
A team of mathematical physicists has developed a new theoretical calculation that predicts new possible states for quantum particles that have received a photon. These states are distinct from conventional coherent states and can be applied to various models satisfying shape-invariance conditions.
Researchers at Los Alamos National Laboratory have developed carbon nanotube optics for optical-based quantum cryptography and quantum computing. The team's work involves integrating nanotubes into photonic cavities to manipulate light-emission properties and creating single-photon emitters for quantum info-processing.
Researchers create method to detect individual phonons, enabling study of phonon decay and its implications for quantum technologies. The technique uses ultra-short laser pulses to excite and probe phonons in diamond crystals.
Scientists have created a module for quantum repeaters, enabling entanglement to be transmitted over several floors and potentially up to 20 kilometers. The breakthrough could lead to integrating quantum technologies into conventional telecommunications.
Scientists at Jefferson Lab measured the pressure distribution inside a proton for the first time, revealing a pressure cooker environment. The results show that quarks are subjected to a high outward-directed pressure near the center of the proton.
Scientists at the University of Innsbruck have successfully demonstrated fully-controlled free-space quantum interference of single photons emitted by a pair of effectively-separated entangled atoms. This breakthrough opens up new possibilities for building quantum computers and measuring physical properties with unprecedented precision.
The Big Bell Test project, which involved over 100,000 participants worldwide, confirmed the predictions of quantum physics by overcoming Bell's limit. This achievement demonstrated the power of global networks in cutting-edge scientific research and paved the way for secure communications that are impossible to intercept.
Researchers have developed a new method for generating fast X-rays using standard laboratory lasers, allowing them to image the movement of electrons in organic materials. This breakthrough enables the study of extreme reaction steps and could lead to improved solar cells and catalysts.
The BIG Bell Test challenged Einstein's principle of local realism by using human input to close a paradox known as the freedom-of-choice loophole. Participants contributed over 90 million bits, determining how entangled atoms and particles were measured in twelve laboratories worldwide.
The BIG Bell Test challenged Einstein's local realism by using human volunteers' unpredictable choices to close a stubborn loophole. Participants contributed over 90 million bits, demonstrating strong disagreement with local realism and introducing new methods in entanglement study.
The US DOE's APS-CNM Users Meeting will facilitate collaboration and planning for future scientific discoveries. The event features lectures, workshops, and networking opportunities to drive innovation in fields like materials science and quantum research.
Researchers have observed stronger-than-binary correlations in quantum mechanics for the first time, utilizing three-dimensional entangled photon sources. The experiment, conducted 8 meters apart, demonstrates the existence of such correlations, which could lead to a deeper understanding of fundamental problems in quantum theory.
Researchers have developed a new optical sensing method that significantly improves the precision of measuring nanoscopic structures, with potential applications in understanding cell membranes and DNA. The technique uses two-photon interference to achieve 100x better resolution than existing methods.
Scientists at University of Southern Denmark create photonic quantum memory allowing manipulation of light on nonlinear level. They successfully demonstrate novel method to subtract a single photon from an optical beam, enabling future applications in quantum information science.
Researchers developed a new method for creating extremely precise clocks using controlled nuclear transitions in thorium-229 nuclei. The frequency of transitions can be increased or decreased by dozens of times, potentially increasing precision by an order of magnitude.
Astronomers used computer simulations to create images of accreting supermassive black holes in different gravity theories. They found that even highly non-Einsteinian black holes could mimic the appearance of standard black holes, highlighting the need for new techniques to distinguish them.
Researchers used the world's most powerful X-ray source to study fuel injection and combustion in a gas turbine engine. The data gathered will help advance gas turbine engine designs for higher power density and efficiency.
Researchers discover silicon carbide as a promising material for single-photon emission, enabling high-speed quantum internet. This breakthrough could guarantee unconditionally secure data communication lines forever.
Physicists at ITMO University and University of Sheffield created a polariton crystal lattice with adjustable geometry. The lattice's properties can be modified, allowing for the study of quantum effects and potential applications in optical computing.
Researchers have successfully harnessed the power of quantum mechanics by controlling the interaction between light and matter at room temperature. By using plasmonic nanoresonators to concentrate electromagnetic energy, they enabled the re-absorption of photons by quantum emitters with high probability.
Scientists have discovered a way to control the flow of terahertz photons using ordinary computer chips, which could lead to faster computers and higher bandwidth communications. The method uses a 'coyote time' effect, where the molecule doesn't know its energy after the first photon hits, allowing for more efficient switching.
A team of MSU scientists developed a method to create two beams of entangled photons, measuring the delay between them. They achieved a narrow peak in the sum frequency signal with a width of 90 femtoseconds, setting a new record for entanglement correlation precision.
Researchers at the Laboratory for Attosecond Physics have successfully observed non-linear interaction of an attosecond pulse with electrons in one of the inner orbital shells around the atomic nucleus. This breakthrough was made possible by the development of a novel source of attosecond pulses.
A team of researchers has developed a statistical approach to identify characteristic signatures across unmeasurable probability distributions in quantum computers. This breakthrough could help predict the behavior of photons in optical arrangements and differentiate between various particle types, bringing us closer to solving the cer...
Researchers observe groups of three photons interacting, forming a new kind of photonic matter. The bound photons acquire mass and travel slower than non-interacting photons.
Researchers at the University of Maryland created a photonic chip that generates single photons and steers them around bends in the road. The device mitigates issues by rethinking crystal hole shapes and patterns, ensuring reliable transit for individual photons.
Researchers at Princeton University have successfully linked silicon spin qubits using light, enabling long-distance communication and opening the door to more complex systems. This breakthrough increases flexibility in device design and could lead to the creation of quantum computing devices from silicon.
Scientists at the University of Waterloo have captured the first images of ultrafast photons that are energy-time entangled, enabling direct applications for quantum cryptography and communication protocols. This technique will allow for establishing highly secure communication channels over long distances.
Researchers discovered that caesium lead halide nanocrystals emit light at room temperature after just one nanosecond, making them faster and brighter than other quantum dots. This is due to their unique excited energy state, which allows for immediate light emission, unlike traditional quantum dots that rely on a dark state.
A team of researchers has successfully tested quantum nonlocality in the presence of photon loss using quantum teleportation. They demonstrated that entangled photons can still be verified even when many are lost during transmission, enabling the development of secure global quantum information networks.
Researchers propose a new interpretation of quantum mechanics, where the wave function represents a real existence rather than a mathematical description. This idea is demonstrated through an encounter-delayed-choice experiment, showing that a quantum object can exhibit both particle and wave behavior depending on the measurement.
Dark excitons, bound pairs of an electron and hole, can store information in their spin state, but reading their spins is hard due to lack of light emission. New experiments overcome this by introducing a microlens that captures more photons, enabling researchers to detect dark exciton spins more efficiently.