/ en-us Â鶹ÒùÔº internet news portal provides the latest news on science including: Â鶹ÒùÔºics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine. A research team has experimentally calculated the Jones polynomial based on the quantum simulation of braided Majorana zero modes. The research team determined the Jones polynomials of different links through simulating the braiding operations of Majorana fermions. This study was published in Â鶹ÒùÔºical Review Letters. /news/2024-12-jones-polynomial-based-majorana-modes.html Quantum Â鶹ÒùÔºics Mon, 30 Dec 2024 12:22:40 EST news654783757 Atom interferometers are quantum sensors that use the wave-like nature of atoms to measure gravity, acceleration and rotation with exceptional precision. /news/2024-10-proof-concept-quantum-rotation-sensor.html Quantum Â鶹ÒùÔºics Tue, 01 Oct 2024 11:12:20 EDT news646999934 A perfect combination of fiber optics and micro/nanotechnology, optical micro/nanofiber (MNF) is a new type of micro/nano-waveguide structure developed in recent years. /news/2024-08-advances-optical-micronanofiber-enabled-tactile.html Nanophysics Nanomaterials Fri, 30 Aug 2024 12:39:03 EDT news644240341 A team of researchers led by Philip Walther at the University of Vienna carried out a pioneering experiment where they measured the effect of the rotation of Earth on quantum entangled photons. The work, published in Science Advances, represents a significant achievement that pushes the boundaries of rotation sensitivity in entanglement-based sensors, potentially setting the stage for further exploration at the intersection between quantum mechanics and general relativity. /news/2024-06-quantum-entangled-photons-react-earth.html General Â鶹ÒùÔºics Quantum Â鶹ÒùÔºics Fri, 14 Jun 2024 14:00:01 EDT news637573742 It's an exciting time for the fields of astronomy, astrophysics, and cosmology. Thanks to cutting-edge observatories, instruments, and new techniques, scientists are getting closer to experimentally verifying theories that remain largely untested. These theories address some of the most pressing questions scientists have about the universe and the physical laws governing it—like the nature of gravity, dark matter, and dark energy. /news/2024-04-formation-flying-spacecraft-probe-solar.html Astronomy Space Exploration Mon, 15 Apr 2024 13:43:04 EDT news632407381 Metasurfaces provide unique platforms to realize exotic phenomena including negative refraction, achromatic focusing, and electromagnetic cloaking due to the engineered dielectric or metallic architectures. The intersection of metasurfaces and quantum optics can lead to significant opportunities that remain to be explored. In a new report now published on Science Advances, Junxiao Zhou, Shikai Liu and a research team in quantum information, nano-optoelectronic devices and computer engineering in China and the U.S. proposed and demonstrated a polarization-entangled photon source. They used the source to switch the optical edge mode in an imaging system to ON or OFF states based on a highly dielectric metasurface. The experiment enriched the fields of quantum optics and metamaterials as a promising direction toward quantum edge detection and image processing with a remarkable signal-to-noise ratio. /news/2020-12-metasurface-enabled-quantum-edge.html Quantum Â鶹ÒùÔºics Tue, 29 Dec 2020 07:50:01 EST news528447037 Fiber optic gyroscopes, which measure the rotation and orientation of airplanes and other moving objects, are inherently limited in their precision when using ordinary classical light. In a new study, physicists have experimentally demonstrated for the first time that using entangled photons overcomes this classical limit, called the shot-noise limit, and achieves a level of precision that would not be possible with classical light. /news/2019-05-entangled-photon-gyroscope-classical-limit.html Quantum Â鶹ÒùÔºics Thu, 16 May 2019 09:30:06 EDT news477108320 In a recent study now published in Light: Science & Applications, Ming Zhang, Lan-Tian Feng and an interdisciplinary team of researchers at the departments of quantum information, quantum physics and modern optical instrumentation in China, detailed a new technique to generate photon-pairs for use in quantum devices. In the study, they used a method known as four-wave mixing to allow three electromagnetic fields to interact and produce a fourth field. The team created the quantum states in a silicon nanophotonic spiral waveguide to produce bright, tunable, stable and scalable multiphoton quantum states. The technology is comparable with the existing fiber and integrated circuit manufacturing processes to pave the way to engineer a range of new generation photonic quantum technologies for applications in quantum communication, computation and imaging. The multiphoton quantum sources detailed in the work will play a critical role to improve the existing understanding of quantum information. /news/2019-05-multiphoton-quantum-states-silicon.html Optics & Photonics Quantum Â鶹ÒùÔºics Thu, 09 May 2019 10:00:01 EDT news476613981 Researchers have developed a simple and stable device to generate the quantum states necessary for quantum key distribution. The device could make it more practical to develop a global data network that uses this very secure method of encryption to protect everything from credit card transactions to texts. /news/2019-05-all-fiber-device-free-space-based-quantum.html Optics & Photonics Quantum Â鶹ÒùÔºics Mon, 06 May 2019 12:39:59 EDT news476365154 Â鶹ÒùÔºicists at the University of California, Irvine and elsewhere have fabricated new two-dimensional quantum materials with breakthrough electrical and magnetic attributes that could make them building blocks of future quantum computers and other advanced electronics. /news/2017-04-physicists-d-materials-electricity.html General Â鶹ÒùÔºics Quantum Â鶹ÒùÔºics Wed, 26 Apr 2017 13:00:08 EDT news412421526 Researchers in Italy hope to measure Earth's rotation using a laser-based gyroscope housed deep underground, with enough experimental precision to reveal measurable effects of Einstein's general theory of relativity. The ring laser gyroscope (RLG) technology enabling these Earth-based measurements provide, unlike those made by referencing celestial objects, inertial rotation information, revealing fluctuations in the rotation rate from the grounded reference frame. /news/2017-03-deep-earth-rotational-effects.html General Â鶹ÒùÔºics Tue, 14 Mar 2017 11:51:44 EDT news408711091 Accurately sensing rotation is important to a variety of technologies, from today's smartphones to navigational instruments that help keep submarines, planes, and satellites on course. In a paper accepted for publication in the American Institute of Â鶹ÒùÔºics' journal Review of Scientific Instruments, researchers from the Technical University of Munich and New Zealand's University of Canterbury discuss what are called "large ring laser gyroscopes" that are six orders of magnitude more sensitive than gyroscopes commercially available. /news/2013-05-scaling-gyroscopes-earth-rotation.html General Â鶹ÒùÔºics Mon, 06 May 2013 15:03:31 EDT news287071406 (Â鶹ÒùÔºOrg.com) -- Decoherence can be metaphorically seen as a quantum fall from grace: When quantum bits, or qubits, are in superposition – such as a single qubit simultaneously having both 1 and 0 values – they’re said to be in a state of coherence. Any coupling with the environment – whether intentional (as in an observation or measurement) or accidental – causes the superposition to collapse into a state of decoherence in which only one of all possible coherent states exists. When two or more objects – be they subatomic particles, atoms, molecules, or even small but macroscopic diamonds – are in a state of entanglement, a change in a property of one instantaneously appears as the inverse change in the same property of the other, and does so instantaneously – i.e., no time elapses – regardless of the distance between the two entangled objects. Since entanglement is critical factor in quantum information, and decoherence can degrade or terminate entanglement (the latter referred to as entanglement sudden death), preserving coherence is vital to the development of quantum computing, quantum cryptography, quantum teleportation, quantum metrology and other quantum information applications. Recently, scientists in the Department of Â鶹ÒùÔºics at Pohang University of Science and Technology (POSTECH) have devised a way to protect entanglement by mitigating decoherence using weak measurement and quantum measurement reversal. /news/2012-02-entanglement-decoherence-sudden-death.html Quantum Â鶹ÒùÔºics Mon, 27 Feb 2012 08:00:01 EST news249548975 (Â鶹ÒùÔºOrg.com) -- The often counterintuitive quantum world of superposition, entanglement, and tunneling can greatly enhance applications as diverse as communication, information processing, and precision measurement. At the same time, photons have the equally attractive properties of low noise, light speed transmission, and ease of manipulation using conventional optics. However, due to the probabilistic nature of single photons, the two have never been integrated into a single system – until now. Researchers have developed a stable architecture that, by instantiating a fundamental feature of the proposed KLM controlled-NOT (CNOT) gate, proposed a decade ago, as an element in a photonic quantum circuit, is expected to allow on-demand entanglement generation and purification through scalable quantum computation. /news/2011-06-all-optical-quantum-controlled-not-photonic-gate.html Quantum Â鶹ÒùÔºics Fri, 24 Jun 2011 07:10:03 EDT news228110662