Articles tagged with Quantum Optics
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Researchers have successfully demonstrated the first InAs/InP quantum-dot laser in the mid-infrared 2 μm band, achieving a low threshold current density of 118 A/cm² at room temperature. The device's precise control strategy and high-density, uniform quantum-dot ensemble enable high-performance devices on heterogeneous platforms.
A research team has demonstrated how quantum mechanical entanglement can be used to measure several physical parameters simultaneously with increased precision. By distributing atoms into up to three spatially separated clouds, the effects of entanglement act at a distance, reducing measurement uncertainties and canceling disturbances.
A nanostructure composed of silver and an atomically thin semiconductor layer can be turned into an ultrafast switching mirror device, displaying properties of both light and matter. This discovery could lead to dramatically increased information transmission rates in optical data processing.
Dr. Marlan Scully traces the journey of quantum mechanics, from its quirky beginnings to its role in solving science's toughest challenges, including quantum computing, cryptography, and gravitational wave detection.
Uriel Levy has been appointed as the inaugural editor-in-chief of SPIE's Advanced Quantum Catalyst journal, which will serve as a premier venue for real-world quantum applications. The journal aims to bridge the gap in quantum research publishing landscape by emphasizing implementation, integration, and cross-disciplinary applications.
A team of scientists proposes a new scheme for 1D DTQW systems with coherent multiple long-range connectivity in the synthetic frequency lattice. This enables faster diffusion speed and breaks the weak coupling limit, facilitating quantum gate operations.
Researchers at the University of Trieste and CNR-INO have achieved the first imaging of individual trapped ytterbium atoms in Italy. By combining intense fluorescence pulses with fast re-cooling, they demonstrated record-speed imaging of individual atoms, enabling precise onsite atom counting and advancing quantum computing applications.
Researchers at Paderborn University and TU Dortmund University have developed materials smaller than the wavelength of light and precisely manipulated photons. They created quantum light sources for quantum computing and ultra-fast communication, as well as low-temperature electronics to control quantum experiments.
A team from the University of the Witwatersrand and Huzhou University discovered a vast alphabet of high-dimensional topological signatures, enabling robust quantum information encoding. This breakthrough utilizes orbital angular momentum to reveal hidden topologies in entangled photons.
Researchers have developed a nearly 100 times smaller device that can efficiently control lasers required for thousands of qubits, unlocking potential for larger quantum computers. The device uses microwave-frequency vibrations to manipulate laser light with extraordinary precision.
Researchers developed a precision magnetometer based on magneto-optic material that changes optical properties in response to a magnetic field. The device can detect magnetic fields comparable to those of high-performance cryogenic magnetometers, but with minimal size, weight and power consumption.
The field of quantum structured light has transformed the way we communicate, measure and process information by combining quantum information with spatial and temporal structures of light. This technology enables simpler and faster circuits for quantum computing, as well as improved resolution techniques in imaging and metrology.
Scientists developed a Rydberg-atom detector to measure weak terahertz signals, enabling precise spectroscopy and quantum sensors. The detector uses a gas of rubidium atoms in a Rydberg state, tuning them to specific frequencies for calibration.
Researchers have demonstrated how controlling the structure of photons in space and time enables tailored quantum states for next-generation communication, sensing, and imaging. This breakthrough offers new pathways for high-capacity quantum communication and advanced technologies.
The summit brings together experts and professionals to discuss best practices in quantum education, with a focus on increasing accessibility and visibility of quantum science. The event aims to cultivate a stronger pipeline of talent and knowledge in the field.
Researchers successfully demonstrated entanglement swapping using sum-frequency generation between single photons with a high signal-to-noise ratio. This achievement is expected to contribute to the miniaturization and efficiency improvement of photonic quantum information processing circuit, as well as the extension of transmission di...
Kono recognized for his contributions to optical physics, light-condensed matter interactions and photonic applications of nanosystems. His research explores how light interacts with materials at the nanoscale, potentially leading to new technologies in electronics and quantum communication.
University of Queensland researchers have developed a microscopic 'ocean' on a silicon chip, allowing for the study of wave dynamics at an unprecedented scale. The device, made with superfluid helium, enables the observation of striking phenomena, including waves that lean backward and shock fronts.
Artificial materials with subwavelength structures enable shrinking optical setups onto tiny chips. Meta-surfaces manipulate fundamental light properties, boosting photon pair generation efficiency. This allows for on-chip quantum light sources, single-photon detection, and ultra-precise quantum metrology sensors.
A team from the University of Warsaw developed a new type of all-optical radio receiver based on Rydberg atoms, providing extreme sensitivity and internal calibration. The antenna is powered by laser light, enabling precise control over the lasers and electron dance.
Researchers have developed a highly efficient fiber-coupled single-photon source that generates photons directly inside an optical fiber, reducing transmission loss. This breakthrough enables the creation of secure quantum communication networks and paves the way for next-generation all-fiber-integrated quantum computing technologies.
Researchers have created a new method for generating bright squeezed light in the kilohertz frequency band with milliwatt optical power. By integrating passive and active noise suppression techniques, they reduced technical noise by 9 dB below shot noise limit, extending feedback bandwidth to MHz range.
Researchers have created a chip-based device that can split phonons, enabling the connection of different quantum systems via phonons. This device could help link superconducting qubits with spin-based systems, supporting advances in computing and secure communication.
Scientists have developed a new type of metasurface that combines waveguide physics with planar design to achieve precise control over light at the nanoscale. The metasurfaces produce photonic flatbands across wide angles while preserving ultrahigh quality factors, enabling efficient trapping of light and strong interactions with matter.
Scientists have made the first-ever direct measurement of quantum uncertainty dynamics with attosecond resolution, revealing it's a dynamic and tunable property. The discovery enables novel petahertz-scale secure quantum communication protocols.
The team developed a new method to produce ultrafast squeezed light, which can fluctuate between intensity and phase-squeezing by adjusting the position of fused silica relative to the split beam. This breakthrough could lead to more secure communication and advance fields like quantum sensing, chemistry, and biology.
Researchers create nanoscale slots to tune phonon vibrations, enabling ultrastrong coupling and hybrid quantum states in lead halide perovskite. This breakthrough could improve energy flow and performance in optoelectronics.
Researchers developed a chip-based quantum random number generator that generates unpredictable numbers at 3 gigabits per second, fast enough to support large-scale data centers' security needs. The device overcomes challenges of noise interference with an optical amplifier and dual-photodiode design.
Scientists at OIST use advanced spectroscopy to track the evolution of dark excitons, overcoming the fundamental challenge of accessing these elusive particles. The findings lay the foundation for dark valleytronics as a field, with potential applications in quantum information technologies.
Researchers at U-M have established a quantum testbed that links two labs with optical fibers, enabling remote quantum experiments and expanding access to quantum technology development. The testbed allows for the transfer of entangled light over long distances, revolutionizing communication, computing, and scientific discovery.
The Hebrew University team has developed a way to capture nearly all the light emitted from tiny diamond defects known as color centers. This breakthrough enables the development of next-generation quantum computers, sensors, and communication networks.
Researchers have developed a novel nonclassical hybrid passive-active power stabilization technique to break the limit of squeezing in the kHz band. The approach reduces technical noise by −122 dB/Hz to −165 dB/Hz, extending the feedback bandwidth from 50 kHz to MHz range.
Researchers introduced a new wavefront sensing method using microlens arrays to measure the phase of position-correlated biphotons. This technique is inspired by classical SHWS and handles an important type of biphoton state in quantum imaging, which cannot be properly measured by previous methods.
Researchers at MIT introduce the concept of a neutrino laser that uses cooled radioactive atoms to produce amplified neutrino beams. By cooling rubidium-83 to near absolute zero, the team predicts accelerated radioactive decay and production of neutrinos. This innovation could lead to new applications in medicine and communication.
Researchers from UNamur, Harvard, and MTU developed a photonic chip that achieves longer entanglement range using near-zero refractive index photonics, a breakthrough for quantum computing. This technology has the potential to enable more efficient lasers, sensitive optical sensors, and faster ultra-secure telecommunication tools.
Researchers at CCNY discovered a novel coupling between nitrogen-vacancy centers and photonic structures, overcoming challenges in quantum information technologies. The discovery also enables sensitive imaging of photonic modes with remarkable contrast.
The new Harvard device can turn purely digital electronic inputs into analog optical signals at high speeds, addressing the bottleneck of computing and data interconnects. It has the potential to enable advances in microwave photonics and emerging optical computing approaches.
Researchers at Johns Hopkins University have created a new class of quantum sensors that can detect even the faintest molecular vibrations. This breakthrough could lead to earlier disease detection and enhanced industrial process control. By harnessing the power of quantum principles, scientists can now engineer the quantum environment...
Researchers developed an open-source software tool, Phoenix, to simulate light behavior in quantum systems, solving wave equations in record time without high-performance computing expertise. The program is up to a thousand times faster and 99.8% more energy-efficient than conventional tools.
Researchers create metasurfaces to control photons and entangle them for quantum computing and sensing. The discovery could lead to miniaturized optical setups with improved stability, robustness, and cost-effectiveness.
Researchers have discovered a simple way to protect atoms from losing information by shining a single laser beam on them, reducing spin relaxation rates. The technique uses light to subtly shift atomic energy levels, aligning spins and keeping them in sync even as they collide with each other or surroundings.
Researchers at Tampere University have experimentally confirmed the conservation of angular momentum in a single photon converted into a pair, validating a key principle of physics. This breakthrough opens up new possibilities for creating complex quantum states useful in computing, communication, and sensing.
Researchers discovered solitonic superfluorescence in hybrid perovskites at room temperature, enabling exotic quantum states such as superconductivity and superfluidity. The study provides a blueprint for designing materials that can function at high temperatures, a crucial step forward for quantum technology development.
A new quantum random number generator has been developed, surpassing existing generators in speed and size. This breakthrough could significantly impact industries relying on strong data security, including health, finance, and defense.
Researchers developed a photolithography-based process for patterning solution-processed materials, achieving high-resolution patterning of QD color converters for micro-LED displays. The technique preserves optical properties and can be applied to various solution-processed materials, making it highly desirable for the display industry.
Researchers propose a polychromatic-pumped quantum light source to overcome exponential demand for spectrum in fully connected multi-user networks. The new approach enables significant reduction in wavelength channels required, with a 67% decrease projected for larger user counts.
Researchers have developed a new technique called electro-optic sampling that uses ultrashort laser pulses to probe electric fields in crystals. This allows for the accurate capture of molecular spectra and detection of faint signals, providing profound insights into quantum physics.
Researchers at University of Rochester and RIT created an experimental quantum communications network to transmit information securely over long distances. The network uses single photons to enable secure communication without cloning or interception.
The 56th Annual Meeting of the American Physical Society's Division of Atomic, Molecular and Optical Physics will present new research on quantum computing, lasers, and Bose-Einstein condensates. Over 1,200 physicists from around the world will convene in Portland, Oregon, June 16-20.
Researchers create 3D photonic-crystal cavity to study ultrastrong coupling between light and matter, enabling faster and more energy-efficient quantum computing and communication technologies. The study paves the way for hyperefficient quantum processors, high-speed data transmission and next-generation sensors.
Physicists at Harvard SEAS have created a compact, on-chip mid-infrared pulse generator that can emit short bursts of light without external components. This device has the potential to speed up gas sensor development and create new medical imaging tools.
Researchers have directly observed a superradiant phase transition (SRPT) in a magnetic crystal, overcoming a long-standing limitation in theoretical physics. The phenomenon occurs when two groups of quantum particles fluctuate collectively without external triggers, forming a new state of matter with unique properties.
Researchers at CNR-INO observed capillary instability in an ultradilute quantum gas, creating a new form of matter with potential implications for industrial and biomedical applications. The study, published in Physical Review Letters, involved the use of imaging and optical manipulation techniques to create and analyze quantum droplets.
Harvard researchers have created a photon router that could plug into quantum networks to create robust optical interfaces for noise-sensitive microwave quantum computers. The breakthrough enables control of microwave qubits with optical signals generated many miles away, bridging the energy gap between microwave and optical photons.
A new bilayer metasurface, made of two stacked layers of titanium dioxide nanostructures, has been created by Harvard researchers. This device can precisely control the behavior of light, including polarization, and opens up a new avenue for metasurfaces.
Physicists use a new method to create an artificial crystal lattice by applying an electric voltage, allowing them to study the behavior of electrons in semiconductor materials. The technique enables insights into strong interactions and their effects on material properties.
A new study from the University of Eastern Finland investigates the behavior of photons at boundaries where material properties change rapidly over time. This research uncovers remarkable quantum optical phenomena that may enhance quantum technology and pave the way for an exciting emerging field: four-dimensional quantum optics.
Researchers measured high-precision transition frequencies and isotope mass ratios in ytterbium isotopes to confirm a nonlinearity anomaly. The team established a new limit for the existence of dark forces and gained insights into atomic nucleus deformation, opening doors for collaboration in physics research.
Scientists achieved a quantum imaging breakthrough with an ultra-thin nonlinear metasurface, combining ghost imaging and all-optical scanning methods to reconstruct images with exceptional resolution. This approach eliminates the need for bulky nonlinear crystals and enables compact, highly tunable platforms for quantum imaging.
Researchers at CNR-INO develop device to explore boundary between classical and quantum physics, enabling study of nanosystems in both regimes. The nano-oscillator traps glass spheres with specific frequencies, exhibiting counterintuitive quantum behaviors.