Articles tagged with Quantum Optics
Researchers developed a tool to determine the minimum quantum computer size needed to solve problems like breaking Bitcoin encryption and simulating molecules. The estimated requirement ranges from 30 million to 300 million physical qubits, suggesting Bitcoin is currently safe from a quantum attack.
By shaking an optical lattice potential, researchers realized a discontinuous phase transition in a strongly correlated quantum gas, opening the door to quantum simulations of false vacuum decay in the early universe. This work provides a flexible platform for exploring the role of quantum fluctuations in first-order phase transitions.
Researchers developed a multifunctional microfiber probe for real-time monitoring of cellular molecules and changes in cell morphology. The nanowire probe enabled sensitive detection of refractive index distribution in single living cells during apoptosis.
Scientists from Tampere University and National Research Council of Canada develop a technique using two-photon N00N states to create entangled photon pairs with improved measurement precision. This allows for spatially structured quantum states of light that can go beyond classical limits in rotation estimation.
Scientists demonstrated experimental realization of an atom-optically synthetic gauge field in a noninteracting Bose gas of Cs atoms. They observed gauge flux-dependent populations and chiral atomic currents, which are significant for understanding gauge fields in synthetic dimensions.
Researchers at TU Delft and UNICAMP successfully teleported the quantum state of a single photon to an optomechanical device containing billions of atoms. This achievement paves the way for creating signal repeaters in a future quantum internet, enabling long-distance quantum communication.
Researchers develop technique to study singlet/triplet ratio of electron pairs in charge-separated states, which could lead to advancements in organic solar cells and qubits. The 'pump-push-pulse' method allows for snapshots of spin state at different times.
Researchers from Politecnico di Torino and INRIM have developed a quantum conformance test that uses entangled light sources to accurately detect conforming or defective products. The test reduces classification errors and improves monitoring efficiency, showing promising prospects for practical applications.
Researchers from Münster, Bayreuth, and Berlin have proposed a new way of preparing quantum systems to generate single photon states. The proposed method uses a swing-up process in the quantum system to separate generated photons from exciting laser pulses, which is promising for applications.
Researchers at Stanford University have developed a miniaturized frequency comb that can generate non-classical light, enabling the study of quantum entanglement and opening up new pathways for quantum computing. The microcomb's precise spacing allows for detailed measurement of its finer features.
Researchers have successfully cooled a pair of highly charged ions to an unprecedentedly low temperature of 200 µK using quantum algorithms. This achievement brings the team closer to building an optical atomic clock with highly charged ions, which could potentially be more accurate than existing clocks.
Researchers predict existence of split photons, a new phase of light that behaves like a coin with two distinct halves. The finding advances fundamental understanding of light and its behavior, challenging long-held beliefs.
Researchers propose a method using optical cavities to enhance atom interferometers, enabling extreme momentum transfer for detecting dark matter and gravitational waves. This could facilitate breakthroughs in fundamental physics and future applications.
Researchers at Harvard have successfully observed quantum spin liquids, a previously unseen state of matter that has been elusive for nearly 50 years. By manipulating ultracold atoms in a programmable quantum simulator, the team was able to create and study this exotic state, which holds promise for advancing quantum technologies.
The research team simulated the occurrence of superradiant phase transition (SPT) beyond the no-go theorem by introducing anti-squeezing effects. They achieved this through a nuclear magnetic resonance quantum simulator, demonstrating that SPT can occur even with the A2 term present.
Researchers have found a complete solution to the problem of whether catalytic transformations are possible, revealing that quantum catalysts can boost quantum processes. This breakthrough has practical applications in quantum cryptography, secure communication, and efficient state merging, making noisy states useful in quantum computing.
The new quantum microscope uses entangled photons to create interference patterns on the sample, reducing noise levels and increasing sensitivity by over 25%. This allows for high-resolution imaging of transparent cells without damaging them.
Researchers have developed a superconducting silicon-photonic chip for quantum communication, enabling optimal Bell-state measurement of time-bin encoded qubits. This breakthrough enhances the key rate of secure quantum communication and removes detector side-channel attacks, significantly increasing security.
Researchers have developed a tiny chip-based device that uses two-mode squeezing to create unconditional entanglement between continuous optical fields. The new microcomb has been tested and found to exhibit raw squeezing of 1.6 dB, with potential for further improvement by reducing system losses.
A team of researchers at EPFL and Purdue University has developed a magnetic-free optical isolator using integrated photonics and micro-electromechanical systems. This device can couple to and deflect light propagating in a waveguide, mimicking the effects of magnet-driven isolators without requiring magnetic fields.
Researchers at Harvard John A. Paulson School of Engineering and Applied Sciences have developed a simple spatial light modulator made from gold electrodes covered by a thin film of electro-optical material. This device can control light intensity and pixel by pixel, enabling compact, high-speed, and precise optical devices.
Scientists from Tokyo Institute of Technology have discovered a new method to manipulate quantum vibrations in solids using polarized light pulses. The research demonstrates the importance of polarization in controlling these vibrations, which could lead to breakthroughs in quantum control and material properties.
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.