Articles tagged with Photons
Researchers at JQI establish a new record for heralding efficiency, detecting entangled photons with 84% accuracy. This achievement paves the way for tighter loopholes over quantum reality and potentially random number generation.
Researchers at RUB created a square lattice of magnetic islands, where the north and south poles aligned themselves in chains. Higher-order interactions determined the magnetization orientation, leading to a chain formation instead of expected zigzag pattern.
Researchers from the University of Vienna and University of Jena have successfully realized a boson sampling computer utilizing photon mobility. This breakthrough may lead to the first outperformance of classical computers in near future.
Researchers at ICFO have successfully demonstrated a new quantum-mechanical measurement technique, allowing for the observation of spinning electrons in atoms without disturbing them. This achievement exceeds the standard quantum limit and paves the way for the observation of individual atoms.
Researchers at ETH Zurich successfully demonstrate the Hong-Ou-Mandel effect using microwave photons, showcasing a fundamental aspect of quantum mechanics. The experiment offers new possibilities for characterizing radiation sources and may lead to practical applications in quantum communication and information processing.
A UT Arlington electrical engineer is working on a $8 million project to increase internet security by using the quantum nature of light to transmit more information over longer distances. The research aims to develop a method that can dramatically increase data transmission capacity and speed without compromising security.
Researchers at MIT have developed a new solar-cell coating that can boost efficiency to 34%, harnessing the energy of visible light to convert sunlight into electricity more efficiently. The breakthrough could lead to significantly higher solar panel performances, potentially reaching over 30% efficiency.
Researchers from the University of Vienna have closed a loophole for photons, providing definitive experimental proof that quantum particles can exhibit non-classical behavior. The study uses entangled photon pairs and advanced detection technology to rule out possible explanations for previous results.
University of Michigan researchers create a new single-photon emitter that improves upon existing technology and is easier to make, paving the way for practical quantum cryptography. The device releases one photon at a time, allowing for secure communication by encoding messages in photons.
Scientists aim to develop first global quantum communication network by testing the limits of quantum entanglement using the International Space Station. The proposed experiment uses Bell's theorem and quantum key distribution to enable secure communication over long distances.
Researchers at Cambridge University have successfully generated high-quality photons identical to lasers from solid-state devices, a major breakthrough towards quantum networking. This achievement brings us closer to realizing a quantum internet, where distributed networks can share highly coherent and programmable photonic interconnects.
Weizmann Institute researchers found that measuring a single atom's spin can collapse its superposition into one state. By adjusting the polarization of the emitted photon, they demonstrate that observers can influence the spin collapse, suggesting an 'action-at-a-distance' effect.
A team of physicists at UCSB has made a discovery that provides new understanding in the quantum realm. By manipulating light on superconducting chips, they have developed an unprecedented level of control over photons, enabling the shaping of released photons into different wave forms.
Researchers are pursuing a quantum satellite concept to establish a secure global quantum communication network by harnessing the signal's travel time in empty space. The team has emphasized precise alignment between the satellite and ground stations to ensure accurate measurement of photons.
Researchers at ICFO have discovered that graphene can convert a single photon into multiple excited electrons, generating larger electrical signals. This feature makes graphene an ideal building block for devices relying on converting light into electricity, with potential applications in solar cells and efficient light detection.
Researchers have shown that performing an action on one particle can immediately affect another, even if they are separated by vast distances. This has implications for secure communication methods, as entangled photons could enable fast and private data transfer.
A proof-of-concept device that combines a single nitrogen-vacancy centre with an optical resonator and waveguide has been created. The device, described as the 'building block of future quantum networks,' could enable faster computers for certain problems.
A research team at the University of Innsbruck has successfully transferred quantum information from an atom to a single photon, paving the way for the construction of a quantum internet. This breakthrough enables the transfer of quantum information over optical channels between quantum computers.
Computer simulations show that nanoparticles of silicon BC8 can generate multiple electron-hole pairs per photon, increasing maximum efficiency to 42% beyond conventional solar cells. Using parabolic mirrors to focus sunlight could further boost efficiency up to 70%
A new single-photon detector has been developed, achieving a previously unattained detection efficiency of 91% and low error rate. The detector's high performance enables reliable detection of single photons, crucial for optical data transmission and quantum computation.
Researchers create entangled pair of photons with 50m and 144km separation, demonstrating non-causal quantum eraser effect. The choice of measurement on one photon determines the wave-like behavior of its twin, regardless of distance or time.
A new JQI photodetector uses an adaptive network of detectors with feedback to read quantum information with minimal uncertainty. By combining multiple stages and using phase reference waves, the system can beat the standard quantum limit for quaternary encoding.
Scientists at National University of Singapore successfully developed a secure bidding system using entangled photons. The 'noisy storage' model allows for secure information sharing between two parties without trusting each other.
Physicists at the University of Texas at Austin have designed a simulation that emulates key properties of electronic topological insulators. The simulation, called SPINDOMs, allows researchers to control the spin of photons in a way that emulates what can be done with electrons.
Researchers have shown that even in disordered structures, photons can sense and coordinate their travel through a medium. This is due to the wave properties of photons, which allow them to interact with each other. By analyzing these interactions, valuable insight into complex microscopic structures can be gained.
Researchers use harmonic generation microscopy to create high-resolution maps of skin cells, revealing increased sizes of basal keratinocytes and nuclei with natural aging. The findings provide an index for scoring natural or intrinsic skin aging, which could help monitor skin health and test effectiveness of anti-aging treatments.
Recent NIST experiments suggest that QED may not accurately account for the behavior of atoms in exotic states. The research found that highly charged ions exhibit different photon emission colors than predicted by QED, sparking further investigation.
Researchers at the University of Oregon successfully transferred an optical signal between two colors using a mechanical oscillator. This breakthrough could pave the way for building and connecting quantum computers, where photons carry information.
Griffith University researchers have developed a device capable of amplifying the information in a single photon without adding noise, preserving quantum information. The breakthrough has far-reaching implications for quantum technologies, including improved quantum cryptography and long-distance communication.
Physicists at the University of Bristol have made a significant breakthrough in understanding the nature of light by demonstrating its wave-particle duality. The experiment, published in Science, shows that photons can exhibit both wave-like and particle-like behavior simultaneously, resolving a long-standing debate in quantum mechanics.
Researchers created a device that tames the flow of photons using synthetic magnetism, breaking the time-reversal symmetry of light. This innovation enables precise control over photon trajectories, opening up novel ways to manipulate light for various applications.
Researchers from NREL demonstrated a solar cell with external quantum efficiency exceeding 100 percent, producing up to 30% more current than conventional technology. This breakthrough harnesses the power of multiple exciton generation (MEG) to reduce heat loss and increase electrical energy.
A team of scientists at the Max Planck Institute for Gravitational Physics discovered a record-breaking millisecond pulsar, PSR J1311-3430, using a new data analysis method. The pulsar is accompanied by an unusual sub-stellar partner that it is vaporizing, earning it the nickname 'black widow'.
A team of scientists has developed integrated arrays of optical vortex beams on a silicon chip, which can be used to transmit multiple streams of information. This breakthrough could enable the creation of compact and high-density devices for applications such as sensing and microscopic particle manipulation.
Researchers discovered a second step in the light receptor process that corrects for rhodopsin errors, resulting in more accurate reading of light under dim conditions. This finding has long-term significance for understanding and treating vision deficits.
Sergei Kopeikin's research suggests the Pioneer anomaly can be explained by the effect of the universe's expansion on photons. This discovery could improve measurements for interstellar exploration.
A French team identified key parameters to generate high-fidelity single photons, crucial for quantum computing and communication. They simulated detector properties and experimental results to improve reliability.
Researchers have made precise measurements without disturbing the system, providing direct experimental evidence that a new measurement-disturbance relationship is more accurate. This finding has significant implications for fields like quantum cryptography.
Researchers at the University of Toronto have demonstrated the ability to directly measure disturbance and confirm that Heisenberg was too pessimistic about the uncertainty principle. By employing weak measurement techniques, they found that the disturbance induced by measurement is less than previously thought.
The 'magic carpet' technology uses plastic optical fibres to map a person's walking patterns and identify gradual changes or sudden incidents like falls. As many as 30%-40% of community-dwelling older people fall each year, making this technology vital for preventing accidents.
UCI astrophysicists analyze NASA data suggesting gamma rays could be evidence of dark matter particles annihilating each other. The observation is consistent with leading theories for dark matter and its presumed presence at galactic centers.
Researchers developed a technique using ultrafast lasers and advanced optics to capture billions of images per second, enabling the reconstruction of 3D shapes hidden from sight. This technology may prove invaluable in disaster recovery situations and noninvasive biomedical imaging applications.
Researchers at Disney Research developed a new virtual ray lights technique to simulate realistic smoke, dust, and participating media effects. The approach leverages photon beams to generate images, reducing the need for particles and increasing efficiency.
Researchers have successfully produced and implemented single particles of light into a quantum key distribution link, enabling secure communication networks. The experiment uses semiconductor nanostructures to emit single photons with high efficiency, making it possible to transmit keys over longer distances without interception.
Researchers develop tool to decompose photon pairs' superimposed states, enabling access to their information even with imperfect measurements. The findings suggest that higher entanglement levels can reveal more information, leading to more resilient quantum info applications.
Researchers from the University of Calgary found that even with complete information, predicting certain experiment outcomes in quantum physics can't be done perfectly beforehand. Quantum theory appears to be close to optimal in terms of its predictive power, according to a new study.
Researchers have successfully trapped and controlled light within a graphene lattice, allowing for the development of computers with optical switches. This breakthrough demonstrates the high potential of graphene in nanoelectronics.
The partnership will expand X-ray technology and research capabilities, enabling scientists to solve pressing global problems. Scientists from the two facilities will work together on R&D projects to improve light-source technology and upgrade beamlines.
An international team of scientists has successfully created bright coherent x-ray radiation using a new method developed at the Vienna University of Technology. This breakthrough enables the production of high-energy x-rays with short wavelengths, making it suitable for various applications such as materials science and medicine.
Researchers at the University of Maryland have developed a new type of hot electron bolometer that can detect infrared light with high sensitivity and speed. The device uses bilayer graphene to absorb low-energy photons, making it promising for applications in security imaging technologies and studying dark energy.
The photon sieve, a variant of Fresnel zone plate, focuses light through diffraction to create high-resolution images. The technology has been successfully demonstrated in ground tests and is set to be deployed on a Cubesat satellite, offering a game-changing solution for space-based imaging.
Researchers at the University of Innsbruck have developed an efficient and tunable interface for quantum networks, enabling high-speed transfer of quantum information between matter and light. The interface, which uses entanglement to connect a single ion with a photon, achieves efficiency rates over 99 percent.
Scientists from the University of Cambridge and Toshiba Research Europe Ltd. developed an all-semiconductor quantum logic gate, a controlled-NOT (CNOT) gate, by coaxing nanodots to emit single photons of light on demand. This breakthrough brings researchers closer to creating powerful quantum computers.
The JQI switch can steer a beam of light from one direction to another in 120 picoseconds using only 140 photons, requiring minimal power. This achievement marks a significant step toward creating ultrafast and low-energy on-chip signal routers.
Researchers developed a novel solution to produce entangled photon pairs using an integrated circuit, making quantum technologies more accessible. The breakthrough could lead to faster data sorting and solve complex computational problems, potentially leading to new gadgets.
Physicists have demonstrated that quantum particles can be in an entangled state even after measurement, which was previously thought to be an objective fact. The team realized a 'delayed-choice entanglement swapping' experiment, where Victor's choice affected Alice's and Bob's photons after they had been measured.
Researchers from the University of California, Berkeley, have designed a solar cell that emits light as well as absorbs it, increasing voltage and efficiency. The new design broke the efficiency record, achieving 28.3%, with potential implications for all types of solar cells.
Researchers developed a new way to rapidly create single photons by exciting ultra-cold rubidium gas with lasers. This allows for the reliable production of single photons with well-known properties, important for various research areas including quantum information systems and studying dynamics and disorder in physical systems.
The new laser design relies on a million rubidium atoms doing synchronized line dances to produce dim but brighter laser light. The superradiant laser's stability is less sensitive to mirror motion, making it potentially 1,000-fold more stable than conventional lasers.
Researchers have found a way to detect subtle changes in quantum data, making it harder for hackers to manipulate encoded communication. The new method, called Measurement Device Independent QKD, allows users to verify each other's data, ensuring unconditionally secure encryption.