Articles tagged with "quantum-technology"
Australian Navy tests quantum navigation to counter GPS spoofing
Australia’s Navy has successfully tested a quantum gravimetric navigation system developed by Q-CTRL, marking a significant advancement toward GPS-independent maritime navigation for defense purposes. The technology uses a quantum dual gravimeter to measure subtle variations in Earth’s gravity, allowing vessels to navigate by comparing these measurements to known gravity maps, effectively providing a GPS-free navigation method. This system was trialed aboard the Navy ship MV Sycamore for 144 hours under real maritime conditions without human interference, demonstrating reliable performance despite the ship’s motion and engine vibrations. The gravimeter is compact and energy-efficient, consuming only 180W of power, which is notably low for such advanced technology. The trials address a critical vulnerability in current navigation systems: GPS signal spoofing and denial, which have caused significant disruptions in commercial and military operations worldwide, including recent incidents in Middle Eastern waterways. GPS outages pose economic risks exceeding one billion dollars daily in the US alone, emphasizing the urgent need for robust alternatives. Quantum gravimetric navigation offers
quantum-navigationquantum-sensorsGPS-spoofingmaritime-navigationdefense-technologygravimetric-navigationquantum-technologyScientists probe whether gravity and space-time alter quantum world
A recent study by researchers from Stevens Institute of Technology, University of Illinois, and Harvard University explores how quantum networks can be used to investigate the effects of curved space-time on quantum theory, probing the intersection of Einstein’s General Theory of Relativity and quantum mechanics. Their work, published in PRX Quantum, introduces a protocol leveraging entangled W-states and quantum teleportation to distribute quantum effects across network nodes, enabling experimental tests of quantum theory under gravitational influences. This approach could provide new insights into whether gravity alters quantum mechanics, addressing a longstanding challenge in physics. The researchers highlight that while quantum mechanics effectively describes atomic and subatomic behavior, it remains unclear how or if gravity modifies these quantum effects, especially given the differences from classical physics at larger scales. Quantum networks, beyond their anticipated role in creating a global quantum internet and ultra-secure communications, offer a novel platform to experimentally study fundamental physics in curved space-time—something classical computing cannot achieve. This research opens pathways toward testing and potentially unifying quantum
quantum-networksquantum-mechanicsquantum-gravityquantum-internetquantum-entanglementquantum-computingquantum-technologyNew light trick keeps atomic spin stable 10x longer at room temp
Researchers from the Hebrew University of Jerusalem and Cornell University have developed a novel technique using a single, carefully tuned laser beam to significantly enhance the stability of atomic spins in cesium vapor at room temperature. This method reduces spin relaxation—a key challenge where atoms lose their magnetic orientation due to collisions and environmental noise—by nearly tenfold without the need for traditional approaches like magnetic shielding or cryogenic cooling. The laser light induces energy level shifts that synchronize the precession of atomic spins, effectively acting as a stabilizer that maintains coherence even under conditions of high magnetic fields and ambient temperatures. This breakthrough has major implications for quantum technologies, potentially enabling more compact, stable, and practical quantum devices such as magnetometers, quantum sensors, and navigation systems that do not rely on bulky or extreme environmental controls. The approach leverages light-induced “light shifts” to keep atomic spins aligned, improving quantum coherence times and making quantum systems more robust against noise. Published in Physical Review Letters, this advancement represents a simpler, scalable solution that
quantum-sensorsatomic-spinslaser-stabilizationquantum-coherencespin-relaxationquantum-technologyroom-temperature-quantum-devicesPhysicists double qubit coherence, opening door to faster quantum computing
Researchers at Aalto University in Finland have achieved a breakthrough in quantum computing by doubling the coherence time of transmon qubits, reaching an echo coherence time of 1 millisecond—significantly surpassing the previous record of approximately 0.6 milliseconds. Coherence time measures how long a qubit can maintain its quantum state without errors caused by environmental noise, which is critical for performing complex quantum operations with high fidelity. Longer coherence times reduce the reliance on extensive quantum error correction, a major hurdle in scaling quantum computers to practical, fault-tolerant devices. The team fabricated high-quality transmon qubits using superconducting materials sourced from Finland’s national research institute, VTT, and utilized advanced cleanroom facilities at Aalto University. This advancement not only marks a significant scientific milestone but also strengthens Finland’s position as a global leader in quantum technology. Supported by initiatives like the Finnish Quantum Flagship and the Academy of Finland’s Centre of Excellence in Quantum Technology, the researchers anticipate that industrial and commercial
materialsquantum-computingqubitssuperconducting-materialscoherence-timequantum-technologyquantum-error-correctionWorld’s first semiconductor made by quantum tech stuns chip industry
Researchers at Australia’s Commonwealth Science and Industrial Research Organization (CSIRO) have unveiled the world’s first semiconductor fabricated using quantum machine learning (QML) techniques, marking a significant breakthrough in semiconductor design. Their approach, centered on a Quantum Kernel-Aligned Regressor (QKAR), outperformed seven classical machine learning (CML) algorithms traditionally used in this field. The team focused on modeling the Ohmic contact resistance—a critical yet challenging parameter that measures electrical resistance at the metal-semiconductor interface—using data from 159 experimental samples of gallium nitride high electron mobility transistors (GaN HEMTs), which offer superior performance compared to silicon-based semiconductors. The QKAR architecture converts classical data into quantum data using five qubits, enabling efficient feature extraction through a quantum kernel alignment layer. This quantum-processed information is then analyzed by classical algorithms to identify key fabrication parameters and optimize the semiconductor manufacturing process. By intelligently reducing the problem’s dimensionality, the researchers ensured compatibility
semiconductorquantum-technologyquantum-machine-learningmaterials-sciencechip-designgallium-nitridehigh-electron-mobility-transistorNew approach allows to insert, monitor quantum defects in real time
Researchers from the UK’s universities of Oxford, Cambridge, and Manchester have developed a novel two-step fabrication method that enables the precise insertion and real-time monitoring of quantum defects—specifically Group IV centers such as tin-vacancy centers—in synthetic diamonds. These quantum defects, created by implanting single tin atoms into diamond with nanometer accuracy using a focused ion beam, serve as spin-photon interfaces essential for storing and transmitting quantum information. The process is activated and controlled via ultrafast laser annealing, which excites the defect centers without damaging the diamond and provides spectral feedback for in-situ monitoring and control during fabrication. This breakthrough addresses a major challenge in reliably producing Group IV quantum defects, which are prized for their high symmetry and favorable optical and spin properties. The ability to monitor defect activation in real time allows researchers to efficiently and precisely create quantum emitters, paving the way for scalable quantum networks that could enable ultrafast, secure quantum computing and sensing technologies. The method’s versatility also suggests
quantum-defectsdiamond-materialsnanoscale-engineeringquantum-computingquantum-sensingmaterials-sciencequantum-technologyUS quantum tech tracks 3D acceleration to boost GPS-free navigation
Researchers at the University of Colorado Boulder have developed a novel quantum-based atom interferometer capable of measuring acceleration in three dimensions (3D), a significant advancement over traditional accelerometers that measure acceleration only in one dimension. The device uses six ultra-thin lasers and tens of thousands of rubidium atoms cooled to near absolute zero to create a Bose-Einstein Condensate (BEC), placing atoms in a superposition state. By manipulating these atoms with lasers and analyzing their interference patterns, the interferometer can precisely detect acceleration without the aging issues that affect conventional electronic sensors like those used in GPS systems. This compact system, roughly the size of an air hockey table, represents an engineering breakthrough with potential applications in spacecraft, submarines, and vehicles for GPS-free navigation. The researchers employed artificial intelligence to manage the complex laser operations required to split and recombine the atom clouds. Currently, the device can detect accelerations thousands of times smaller than Earth’s gravity, and the team anticipates further improvements. This technology
quantum-technologyatom-interferometer3D-acceleration-measurementnavigation-technologysensorsBose-Einstein-Condensaterubidium-atomsFormer UR president Povlsen joins quantum technology leader
robotquantum-technologycryogenic-systemsclean-energycollaborative-roboticstechnology-leadershipBlueforsCông ty Mỹ khai thác helium-3 trên Mặt Trăng
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