Articles tagged with Quantum Optics
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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.
Researchers at the University of Innsbruck have successfully created a digital quantum simulator that can simulate any physical system efficiently. The simulator uses trapped ions to manipulate and encode states, allowing for the study of phenomena such as Zitterbewegung, which had never been observed directly in nature before.
Researchers have developed a new technique to manipulate surface plasmons in real time, enabling the creation of ultra-small-scale optoelectronic devices and systems. This innovation allows for on-the-fly control and flexibility in nano-system design and manufacture.
Researchers led by Anton Zeilinger found that quantum mechanical measurements cannot be interpreted classically even when no entanglement is involved. This challenges the idea of 'spooky action at a distance', sparking debate about the limits of classical physics.
A German-Spanish research group has developed an experiment to test for quantum properties in objects composed of one billion atoms, including the flu virus. This technique could potentially allow researchers to study life and consciousness in the context of quantum mechanics.
Researchers at University of Innsbruck simulate Dirac equation using calcium ion, demonstrating Zitterbewegung and antiparticle behavior. The experiment provides a proof-of-principle for simulating relativistic quantum systems.
Researchers at Air Force Office of Scientific Research have successfully established high-data-rate optical links over long distances using adaptive optics to overcome atmospheric distortions. The next step is to conduct flight tests at increased altitudes to demonstrate air-to-ground quantum communications capabilities.
Researchers at the University of Arizona have performed experiments that show classical chaos exists in the quantum world, revealing new signatures of chaos and entanglement. The team manipulated individual laser-cooled cesium atoms to mimic a textbook example of chaos, demonstrating dynamic stability and erratic behavior.
Researchers at the University of Bristol have successfully implemented a high-fidelity fibre controlled-NOT gate using single photons in optical fibres. This achievement paves the way for more sophisticated quantum networks with increased range and potential applications in computing, communication, and advanced measurement.
Researchers have developed high-speed detectors capable of receiving more information at a higher key rate, making quantum cryptography more user-friendly. This breakthrough enables the transmission of theoretically secure communication over long distances.
Malinovskaya's research aims to control coherence and overcome current barriers in quantum computing, molecular selective bio-imaging, and Raman microscopy. By using femtosecond, chirped laser pulse trains, she can selectively prepare target molecules in the excited state and restore coherence periodically.
Scientists have created a new theory on how to create transistors for quantum computers using photons. The transistors can process optical signals and enable the development of supercomputers that can solve extremely complicated tasks.
Scientists have found experimental evidence of quantum chaos in a system with freely dispersing components. The researchers replicated an historical experiment, demonstrating photoelectric effect and observing Ericson fluctuations.
The National Science Foundation (NSF) supports six Nobel laureates in chemistry, physics, and economics with its grants. NSF supported Robert H. Grubbs, Richard R. Schrock, Yves Chauvin, John L. Hall, Theodor W. Hänsch, and Roy J. Glauber for their pioneering work on metathesis, laser-based precision spectroscopy, and game-theory analy...
Researchers at Yale University have developed a miniaturized superconducting cavity that enables quantum optics experiments on a microchip. The system allows for rapid exchange of energy between photons and atoms, demonstrating the potential for faster computing with quantum qubits.
The university's new Laboratory for Quantum Control will enable original experiments at an internationally competitive level, focusing on controlling atoms and molecules using ultrashort light pulses. The lab aims to lead to increased computer capability, improved optical-fiber communications, and new forms of electronics.
The NIST quantum key distribution system generates a verifiably secret key at a rate of 1 million bits per second, about 100 times faster than previously reported systems. The system uses time-stamping and high-speed observations to identify photons from the sender among multiple photons from other sources.
Scientists have successfully created a crystal of atoms and observed a quantum phase transition, shedding light on fundamental problems in solid-state physics, quantum optics, and atomic physics. By increasing the strength of a microscopic lattice, researchers induced a transition from a superfluid phase to an insulating Mott phase.