Articles tagged with Quantum Optics
Experts successfully connect quantum computers and sensors on a practical scale, enabling entanglement-based quantum communications. The team demonstrated scalability of entanglement-based protocols across three remote nodes using flexible grid bandwidth provisioning.
Researchers propose a novel key distribution scheme based on mode-shift keying chaos synchronization to overcome limitations of laser transition time, achieving 0.7503 Gbit/s rate with high security. The method uses Fabry-Perot lasers and random drive source to generate chaotic waveforms, which are then quantized to produce random bits.
A new quantum secure direct communication (QSDC) network has been demonstrated by a team of scientists, enabling 15 users to communicate securely over long distances. The network uses time-energy entanglement and sum-frequency generation (SFG), achieving a fidelity of greater than 95% for entangled states shared between users.
Researchers at Chalmers University of Technology have developed a unique optical amplifier that offers high performance, is compact enough to integrate into a chip just millimeters in size, and does not generate excess noise. This breakthrough technology has the potential to revolutionize both space and fiber communication.
The Center for Integration of Modern Optoelectronic Materials on Demand will develop new semiconductor materials and scalable manufacturing processes for applications in displays, sensors, and quantum communication. The center aims to connect academic research with industrial and governmental needs, educating a diverse STEM workforce.
Researchers propose a time-sensitive network control plane as a key component of quantum networks, enabling real-time control and low costs. Industry applications include cybersecurity through quantum key distribution, but standardization and certification are needed.
A Russian-U.K. research team has proposed a theoretical description for the new effect of quantum wave mixing involving classical and nonclassical states of microwave radiation. The study builds on earlier experiments on artificial atoms, which serve as qubits for quantum computers and probes fundamental laws of nature.
Researchers from DTU develop Fano laser, harnessing bound-state-in-the-continuum to improve coherence. This advancement enables ultrafast and low-noise nanolasers for high-speed computing and integrated photonics.
Researchers from Paderborn University create a simple integrated quantum network using thin layers of lithium niobate to demonstrate large-scale functionalities. The project aims to develop scalable quantum components with industrial application potential.
Researchers developed a precise stopwatch to count single photons, enhancing imaging technologies like forest mapping and disease diagnosis. The new time lens technology improves photon timing resolution by orders of magnitude.
The DTU researchers have developed a universal measurement-based optical quantum computer platform, enabling the execution of any arbitrary algorithm. The platform is scalable to thousands of qubits and can be connected directly to a future quantum Internet.
Researchers at Nagoya City University have detected strongly entangled pair of protons on a nanocrystalline silicon surface. This breakthrough could enable the creation of more qubits and ultra-fast processing for supercomputing applications, revolutionizing quantum computing.
By briefly delocalizing particles over exponentially larger distances, researchers can harness the quantum nature of nanoparticles. This technique also enables highly sensitive instruments to determine forces such as gravity with high precision.
Researchers from uOttawa propose a new optical element called spaceplate, which simulates light spreading in a small device, enabling the miniaturization of optical systems. This technology has potential applications in fields like healthcare, where thin cameras or endoscopes could be used to visualize internal organs.
A field trial demonstrates a stable and efficient quantum key distribution (QKD) system that can generate quantum-secure cryptographic keys at sustained rates over a standard telecommunications infrastructure. The system, developed by researchers in Italy, is designed to be easy-to-operate and integrate into existing optical networks.
Researchers developed a method to enhance collection efficiency of single QDs using 3D printed micro-lenses, achieving intensity enhancements up to 2.1 and 26% in fibre-coupling validation. A standalone fibre-coupled device was also realised, opening the route to stable stand-alone devices.
Scientists have discovered a way to modify the energy landscape of 2D materials by arranging them in a 3D configuration, creating parallel worlds with unique properties. This new arrangement, known as a nanomesh, has strong nonlinear optical properties and opens up possibilities for quantum computing and communication applications.
Scientists at the University of Innsbruck have created a method to individually address quantum emitters using chirped light pulses, enabling precise control over individual superconducting quantum bits and atoms in various electromagnetic structures. This approach has far-reaching implications for quantum computing and simulation.
A heat-free optical switch developed by KTH researchers can control single photons without generating heat, making it compatible with sensitive single-photon detectors. This technology is crucial for integrating optical switches and photon detectors in a single chip, paving the way for quantum computing and communication advancements.
The team has established a quantum key distribution system over a total distance of 4,600 kilometers for users across China. The system uses trusted relays, ground-based fiber networks, and satellite-to-ground links to achieve unhackable encryption for secure information transfer.
The event presents new research and innovations in photonics, including interactive sessions on nanophotonics, imaging, quantum research, and metalenses. Registration is free and open to the public.
Researchers adapt high-sensitivity optically pumped magnetometers to measure magnetic fields in extreme environments, including geological movements, solar flares, and neural activity. The study highlights techniques to enhance signal and reduce noise, shedding light on emerging hybrid sensors.
Researchers derived an analytical model of optical activity in black phosphorous under an external magnetic field, discovering tunable phenomena. The findings show optical activity conforming to that previously observed in chiral metamaterials and have applications in polarization optics, stereochemistry, and molecular biology.
Weidong Zhou, a UT Arlington electrical engineering professor, has been named a fellow of the Optical Society (OSA) for his significant contributions to photonic crystal membrane lasers and hybrid nanomembrane optoelectronics. His research involves developing on-chip systems for healthcare applications and efficient, scalable lasers fo...
A new machine learning-assisted method has been developed by Purdue University engineers to rapidly preselect solid-state quantum emitters for large-scale integration on chips. This approach significantly speeds up the process, reducing analysis time from minutes to seconds.
Researchers have developed a quantum-inspired approach for OCT detection, allowing for high-quality imaging with power levels up to 1 million times lower than current standards. This breakthrough enables safer and more efficient OCT imaging for medical applications.
Researchers developed an advanced quantum algorithm for measuring physical quantities using simple optical tools, exceeding the shot noise limit and achieving Heisenberg-limited sensitivity. This breakthrough enables affordable and effective platforms for moderate-scale quantum measurements and computations.
Researchers at Chinese Academy of Sciences developed a pulsed optically pumped (POP) atomic clock with unprecedented frequency stability of 4.7 × 10−15 at 10^4 seconds. The new design overcomes challenges in temperature control and barometric effects, ensuring accuracy for global navigation and communication services.
Researchers demonstrate chip-based devices that enable secure quantum key exchange over long distances, reducing size and power needs while maintaining high-speed performance. The new platform facilitates citywide networks and will eventually support complex communication protocols.
Researchers from the Institute for Quantum Computing at the University of Waterloo have made a groundbreaking discovery by directly splitting one photon into three. The achievement uses the spontaneous parametric down-conversion method and creates a non-Gaussian state of light, a critical ingredient for gaining a quantum advantage.
Michael Vasilyev, a UTA professor, was recognized as a Fellow of the International Society for Optics and Photonics (SPIE) for his achievements in nonlinear-optical signal processing. He solved the problem of making all-optical regenerators process multiple data channels at once, reducing cost, size, and power consumption.
Researchers used quantum light to track enzyme reactions in real-time without disrupting enzymatic activity, providing a potential breakthrough for biomedical applications. The technique combines quantum physics and biology to improve sensitivity and resolution.
The development of optical vortices has been divided into three stages: fundamental theories, application development, and technology breakthrough. The recent stage has seen significant advancements in metasurface and OAM-multiplexing, enabling high-capacity optical communication and novel nonlinear phenomena.
Researchers created a bio-inspired compound eye that can detect objects' 3D locations based on light intensity, similar to insects. The system allows for rapid detection and could be used in robots, self-driving cars, and UAVs.
Thomas Ebbesen, a renowned physical chemist, has been awarded the prestigious CNRS Gold Medal for his groundbreaking work in nanosciences. His research has enabled technological breakthroughs in optoelectronics and biosensors, and he is recognized for his pioneering discoveries in carbon materials and molecular systems.
Researchers used an extremely bright mid-infrared laser to perform spectroscopic ellipsometry, capturing high-resolution spectral information in under a second. The new approach offers insights into quickly changing properties of samples and could improve manufacturing processes and scientific discoveries.
Scientists create miniature cone-shaped lenses, called axicons, using a new micro glass blowing method. The technique enables the production of robust and low-cost glass axicons with high performance vacuum packaging, suitable for integration into biomedical imaging instruments like optical coherence tomography.
Researchers have discovered a fundamental limit on the transition probabilities of linear optical systems, constraining their ability to transfer bosons. This discovery leads to a negative answer to Professor Scott Aaronson's open problem on quantum supremacy in decision problems.
Researchers developed an all-fiber device to generate quantum states necessary for quantum key distribution, switching polarization 1 billion times a second. The device is self-compensating and stable, making it suitable for a global quantum network that could protect sensitive data.
A new, portable 3D printed microscope provides high-resolution images of cells, potentially detecting diseases like diabetes and malaria. The instrument uses digital holographic microscopy with super-resolution techniques to achieve twice the resolution of traditional systems.
A new method for characterizing complex quantum states has been developed, enabling quantum simulations on larger systems. This method is based on the repeated measurement of randomly selected transformations of individual particles and provides information about the degree of entanglement.
Researchers at University of Innsbruck discover that digital quantum simulation can retain controlled Trotter errors for local observables, reducing the number of required gate operations. This breakthrough makes digital quantum simulation more accessible to current day quantum devices.
Researchers developed a new imaging method, called compressed optical-streaking ultra-high-speed photography (COSUP), that can capture images at speeds of up to 1.5 million frames per second using standard sensors. COSUP has potential applications in biomedical research, movie production, and scientific research.
A group of researchers proved that whether an object exhibits quantum features depends on the reference frame. The physical laws, however, are still independent of it. This insight might play a role at the interplay of quantum mechanics and gravity.
Researchers at LMU Munich have successfully generated dissipative solitons in passive free-space resonators, a breakthrough that enables the compression of laser pulses while increasing their peak power. This technique opens up new avenues for exploring ultrafast dynamics and precision spectroscopy.
Scientists have demonstrated a laser-based method to transmit sound waves over long distances without requiring any type of receiver, targeting individuals with precision. The technology uses the photoacoustic effect and can be scaled up for longer distances.
A new integrated photonics platform enables precise control of light frequency and storage, opening doors for photonic quantum information processing, optical signal processing, and microwave photonics. The technology uses lithium niobate and has potential applications in radio astronomy, radar technology, and more.
Researchers at the University of Bristol have discovered fundamental limits on the postselection technique used to test quantum mechanics. They found that as complex quantum systems are built, fewer and fewer entangled states can be reached using postselection alone.
Researchers have developed a macroscale fluorescence imaging technique, known as macro-FLIM, that can analyze whole mouse tumors with cellular resolution. The new approach enables observation of biochemical processes taking place within the sample, and could potentially find use in clinical settings to identify tumor edges during surgery.
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.
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.