Articles tagged with Quantum Optics
A new technique using sound waves to levitate water droplets improves the detection of heavy metal contaminants like lead and mercury. The method, combining laser-induced breakdown spectroscopy (LIBS), can detect very low levels of contaminants in real-time on-site.
Researchers have successfully entangled 20 calcium atoms in an ion trap experiment, demonstrating controlled multi-particle entanglement between neighboring groups of particles. The achievement holds significant promise for practical applications such as quantum simulations and information processing.
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 Bar-Ilan University have introduced a method that overcomes the speed limit of quantum communication, enabling data transfer to increase by more than 5 orders of magnitude. This breakthrough uses direct optical nonlinearity to process quantum information in the optical regime, preserving its enormous bandwidth.
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 at Lomonosov Moscow State University developed a new mathematical model that describes the process of soliton occurrence in optical microresonators, taking Raman scattering into account. The system of equations may be used for numerical simulation of effects in optical resonators.
Researchers at Tsinghua University and Nanjing University of Posts and Telecommunications have successfully demonstrated entanglement-based quantum secure direct communication (QSDC) over 500m optical fibers. The system uses novel fiber-based quantum light sources to generate polarization entangled Bell states, enabling secure informat...
Researchers developed a new method to protect quantum information in trapped ions by leveraging dissipation. The approach allows for autonomous correction of quantum states without requiring logical circuits or measurements.
Scientists demonstrated 4D quantum encryption over a free-space optical network, encoding two bits of information per photon and tolerating more signal-obscuring noise. The breakthrough paves the way for practical quantum encryption over free-space networks, enabling secure communication between ground-based networks and satellites.
The study describes a method for measuring potential energy surfaces of atoms near optical nanofibers, facilitating quantum memories and components. It enables controlled interactions between lasers and atoms or materials, crucial for unconditionally secure communications and quantum computing.
Researchers successfully perform optical coherence tomography with XUV radiation at laboratory scale, producing strong image contrasts and achieving higher resolution than infrared-based methods. The technique has potential applications in biology, including non-destructive imaging of cells.
Physicists at the University of Innsbruck have developed a method to generate ultra-focused electromagnetic fields, enabling precise devices for microscopy and other applications. The new scheme utilizes a cylinder reflecting electromagnetic waves to create focused pulses with adjustable frequency.
A new type of 3D display, mimicking the depth cues our eyes are accustomed to in the real-world, improves viewing comfort in VR headsets and AR glasses. The innovative display module, measuring only 1 x 2 inches, produces depth cues that create a unified 3D image, eliminating vergence-accommodation conflict.
A newly developed fiber optic distributed sensor can detect changes in temperature or strain at 1 million points over a 10-kilometer optical fiber in under 20 minutes, improving early detection of structural issues. This faster technology has the potential to prevent failures and provide more time for evacuation.
A team of researchers has devised a new way to implement large-scale interferometers that can dramatically miniaturize optical processing circuitry. By leveraging recent breakthroughs in quantum information, the 'measurement-based linear optics' technique harnesses existing compact methods for generating large-scale cluster states.
Researchers develop a tiny X-ray sensor integrated onto an optical fiber, enabling high-precision medical imaging and therapeutic applications. The sensor has a spatial resolution of around 1 micron, allowing for real-time measurement of radiation delivery to tumors via endoscopy.
Researchers have demonstrated a prototype device that can send unbreakable secret keys from a handheld device to a terminal, enabling secure mobile transactions. The system uses ultra-fast LEDs and moveable mirrors to transmit keys at a rate of over 30 kilobytes per second.
Chiral quantum optics reveals new effects of light's spin and momentum, enabling one-way optical diodes and circulators. This breakthrough could lead to novel applications in computing, quantum networks, and photonics.
Researchers developed a new microscope that can chemically identify individual micron-sized particles using infrared spectroscopy without detectors. The instrument uses photothermal modulation of Mie scattering, allowing for non-destructive analysis and identification of multiple species simultaneously.
A team of researchers from Ocean University of China used logical stochastic resonance to improve the quality of underwater images, enabling better object detection. The approach overcomes challenges in processing degraded images through conventional methods.
Researchers have successfully integrated a complete quantum optical structure on a chip using carbon nanotubes as single-photon sources. This achievement fulfills one condition for the use of photonic circuits in optical quantum computers and opens up new possibilities for ultrafast calculation and secure data encryption.
A new sensor can quickly and cost-effectively detect E.coli bacteria in 15-20 minutes, even at varying temperatures. The device uses bacteriophages to latch onto bacteria, making it a faster alternative to traditional lab tests.
Researchers from ITMO University have developed a novel approach to constructing quantum communication systems, enabling the transmission of single-photon quantum signals across distances of up to 250 kilometers. The system uses side frequencies to simplify device architecture and increase pass-through capacity, making it comparable to...
Twisted light has been characterized using a new method that involves obtaining the Wigner distribution, which completely describes a system in terms of two conjugate variables. This technique is suitable for quantum information applications involving a large number of orbital angular momentum states.
A research team at the University of Sydney has developed a major breakthrough in generating single photons, enabling the creation of secure cyber security systems. This innovation resolves a key issue holding back password exchange and can be scaled up to generate single photons with 100% probability.
Recent study confirms wave-particle duality in quantum mechanics by recreating John Archibald Wheeler's 'great smoky dragon' thought experiment. The research demonstrates that the nature of light is not fixed until observed, with implications for quantum cryptography and computing.
Researchers at RMIT University have successfully created photon pairs that fit on a tiny computer chip, enabling ultra-secure telecommunications. This breakthrough paves the way for the development of scalable integrated devices that exploit mixing of polarization on a single photon level.
Scientists observe a Many-Body Localized state in ultracold atoms trapped in light crystals, where interactions fail to lead to thermalization. This peculiar insulating state retains a quantum memory of its initial state, even at elevated temperatures.
Scientists at ITMO University and Trinity College Dublin discovered that ordinary nanocrystals possess intrinsic chirality, producing a half-and-half mixture of mirror images. This finding has potential applications in targeted drug delivery, medical diagnostics, and nanotoxicology.
Scientists have developed a new protocol to estimate unknown optical processes with enhanced precision using entangled photons, promising better sensors for medical research and more powerful quantum computers. The technique uses the unique properties of quantum mechanics to surpass current limitations in sensing and measurement.
Scientists develop a new technique to reduce the halo effect in multifocal lenses, allowing patients with presbyopia to use them safely at night. The technique smoothes the surface structure of contact or intra-ocular lenses, reducing optical aberrations and improving depth of focus.
Scientists at Eindhoven University of Technology have successfully controlled the shape of light particles, a crucial step towards establishing a 'quantum internet'. This breakthrough enables faster and more efficient quantum communication, paving the way for the development of powerful quantum computers.
Researchers developed ultra-thin LCD screens that maintain 3D images without power consumption, ideal for e-book readers and battery status monitors. The technology uses bi-stable displays to store an image for several years with low power consumption.
Researchers develop new approach to generate mixed-up photon pairs on a chip, exploiting micro-ring resonator technology. The device can directly generate orthogonal polarized photons at very low power, suitable for quantum protocols.
Researchers develop new single-photon detection strategies with high accuracy enhancements, enabling precise timing resolution and fast reset times. New technologies improve space missions and quantum optics, advancing the field of single-photon devices.
Researchers developed a small, lightweight device that combines near-infrared fluorescent imaging to detect marked cancer cells with visible light reflectance imaging to see tissue contours. This technology enhances surgeons' ability to precisely remove tumors and minimize healthy tissue damage.
A Chapman University research team, led by Yakir Aharonov and Jeff Tollaksen, has challenged long-held beliefs about the transition from microscopic to macroscopic scales in nature. Their paper proposes a new theory that gives different predictions than classical physics for certain phenomena.
Researchers have developed a thin silicon lens that can be used in thermal infrared cameras, paving the way for more affordable surveillance systems. The new design has improved image quality and can detect people in low-light conditions.
A new approach converts weak microwave signals into visible light for clean detection and reduces noise by a thousand times. This all-optical detection method is the first to achieve this at room temperature.
Researchers found that identical particles, such as bosons, exhibit overlapping patterns instead of interfering due to exchange effects. This challenges current understanding of quantum optics and has potential applications in precision tests.
Researchers created an innovative imaging system with a deformable lens and iris-like component, allowing for precise control of light focus. The device focuses light almost as well as the biological counterpart in people, with potential applications in medicine and scientific research.
Scientists have developed a new technique to slow down light by embedding dye molecules in a liquid crystal matrix, allowing for more efficient sensing and interferometry applications. The method uses little power, operates at room temperature, and can measure extremely low speeds in just one second of measurement time.
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.
A new optical prescription for automobile side-view mirrors eliminates blind spots without distorting the perceived distance of cars approaching from behind. The design features a horizontally progressive mirror with three resolution zones, offering a greatly expanded field of view and reliable depth perception.
Researchers have created a fiber-optic equivalent of the world's smallest wrench, enabling precise control over microscopic particles like living cells and DNA. This new technique uses flexible optical fibers to twist and turn particles in any direction, promising advancements in biological research, healthcare, and more.
Anton Zeilinger, an Austrian physicist, has been awarded the title of Fellow by the American Association for the Advancement of Science (AAAS) for his significant work in physics. He is a professor at the University of Vienna and scientific director of the Institute of Quantum Optics and Quantum Information.
Scientists have developed a new tool that can deliver precise points of light to a 3-D section of living brain tissue, allowing for unprecedented control over individual neurons. This technology, called optogenetics, has the potential to treat conditions such as Parkinson's disease and epilepsy.
Researchers at the University of Vienna have achieved a world record in entangling twisted light quanta, demonstrating a new method for gyrating photons. This breakthrough could lead to entangling and twisting macroscopic objects in two different directions.
Researchers at Brown University are studying new optical materials to overcome size limitations in light-matter interactions at the quantum scale. Harnessing this power could enable technologies like high-capacity optical memory and secure encryption.
Researchers from the University of Vienna and Université Libre de Bruxelles have shown that in quantum mechanics, a single event can be both a cause and an effect of another one. This challenges our understanding of causality and has far-reaching implications for foundations of quantum mechanics, quantum gravity, and quantum computing.
Researchers at the University of Vienna have discovered that non-entangled states can outperform entangled counterparts for remote state preparation under certain conditions. High quantum discord is a key factor in achieving this outcome.
Researchers have developed new materials that improve X-ray machines' light-capturing efficiency, reducing patient radiation doses and enhancing image resolution. The nanostructures are modeled after the compound eyes of moths, which exhibit anti-reflective properties.
A new experiment shows that light exhibits both electric and magnetic fields simultaneously, violating classical physics, and demonstrating its quantum mechanical nature. The study's findings have implications for understanding the behavior of other systems and developing quantum computers.
Researchers at Joint Quantum Institute store and replay two separate images, a feat of cinematography, using a room-temperature vapor of atoms. The new storage process has great promise for quantum information and may lead to the development of a random access memory for continuous variable quantum information.
Researchers successfully sent highly accurate clock signals across hundreds of kilometers using optical fiber links, overcoming challenges to transmit stable signals over long distances. The achievement brings scientists closer to redefining the second and enabling ultra-precise navigation and other applications.
A team of researchers has demonstrated an optical frequency transfer with high stability through a standard telecommunication optical fiber network. This achievement enables the ability to compare optical clocks located far apart and transmit their stability to distant laboratories, benefiting fundamental research in physics and industry.
Researchers have developed a precise method to create microresonators in optical fibers, enabling the creation of 'Whispering Gallery' structures that can store tiny packets of light. This innovation has the potential to revolutionize computing with faster calculations and more efficient memory storage.
Collective phenomena in nanoscale structures have applications in light generation, optical sensing and information processing. Researchers explore these effects to engineer novel devices with custom-designed optical, electronic and mechanical characteristics.
Theoretical physicists have developed a new concept to create exotic topological states using dissipation, which can lead to immune quantum computers. They successfully linked concepts of quantum optics and condensed matter physics, demonstrating the feasibility of this approach.
Researchers develop a method using flashes of light to observe quantum features of large objects with unprecedented resolution. By analyzing the dynamics of such behavior, pulsed quantum optomechanics provides a path for investigating whether macroscopic mechanical objects can be used in future quantum technologies.