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Quantum

All articles tagged with #quantum

science6 days ago•3 min saved

Sunlight Sparks Laser-Free Quantum Ghost Imaging

First demonstration of sunlight-pumped spontaneous parametric down-conversion (SPDC) paired with ghost imaging, producing quantum-correlated photons with a passive, sunlight-powered source. The setup achieved about 90.7% ghost-imaging visibility (near 95.5% with a 405 nm laser) and used a sun-tracking system and nonlinear crystal, suggesting potential for quantum imaging in remote or space environments while highlighting future gains from improved collection, crystal design, and reconstruction methods.

via SciTechDaily|

#ghost-imaging #photons #quantum

science11 days ago•3 min saved

NSF bets $1.5B on X-Labs to unlock breakthrough science

The National Science Foundation announced NSF X-Labs, a decade-long initiative pledging up to $1.5 billion to fund independent, milestone-driven research teams outside traditional institutions, aiming to turn early concepts into commercially viable platforms. Initial topics cover Scientific Instrumentation for Sensing and Imaging and Quantum Systems: Interconnects and Integrated Photonics, with additional areas to be announced as the program progresses.

via U.S. National Science Foundation (.gov)|

#independent-research-teams #milestone-based-funding #nsf

science19 days ago•12 min saved

Quantum Clocks Probe If Time Itself Can Be in Superposition

Physicists propose using ultra-precise atomic clocks and trapped ions to test whether time can behave as a quantum object, potentially existing in multiple states at once. By cooling ions, controlling quantum states, and exploring squeezed vacuum states, the work aims to reveal quantum signatures of time and explore how relativity and quantum mechanics describe the flow of time.

via SciTechDaily|

#atomic-clocks #quantum #relativity

physics-and-chemistry1 month ago•16 min saved

New Theory Reveals Why a Quantum Gas Keeps Its Cool Under Energy Kicks

Physicists have built a theoretical framework linking interparticle interaction strength to the momentum-kick amplitude in a strongly interacting one-dimensional quantum gas, showing a critical regime where external energy stops being absorbed due to dynamical localization. The model explains why the gas resists heating, suggests the mechanism may apply to other quantum systems, and sets the stage for future experimental tests to explore finite-size and thermodynamic-limit behavior.

via Gizmodo|

#dynamical-localization #energy-absorption #many-body-physics

science1 month ago•37 min saved

Quantum time reversal: theorists outline a Hamiltonian approach to rewinding quantum events

The study shows, in theory, how a quantum system's arrow of time could be reversed by a designed sequence of fields and pulses (a Hamiltonian) that brings the system back to its initial state after measurement, potentially reducing information loss in quantum computers and even reversing decoherence, but practical implementation requires near-perfect measurements, a current major obstacle.

via Yahoo|

#decoherence #hamiltonian #quantum

science2 months ago•5 min saved

Brain Biophotons: A Possible Light Pathway to Consciousness

Scientists propose that brain tissue emits biophotons (light particles) that could carry quantum-like information, suggesting a potential third signaling pathway alongside electrical impulses and chemical synapses. While some experiments show entangled photons can retain correlations through thin brain tissue, the idea is highly speculative and would require more research with specialized detectors and modeling to determine if it influences neural activity or consciousness.

via Indian Defence Review|

#biofield #biophotons #brain

technology3 months ago•15 min saved

Google Urges Swift Post-Quantum Security Upgrades Amid Quantum Threats

Alphabet's Google warns that future quantum computers could crack today's encryption, urging governments and major industries to accelerate post-quantum security work. The company emphasizes crypto agility and ongoing updates, cites NIST's post-quantum standards, and notes that attackers may harvest data now to decrypt later. Google has tested quantum-safe methods in Chrome and argues cloud-based updates can speed the transition, while markets reacted to the news and analysts see potential upside from stronger security infrastructure.

via TipRanks|

#cybersecurity #encryption #google

science3 months ago•3 min saved

Sodium Nanoparticle Demonstrates Quantum-Wave Behavior at Unprecedented Scale

Researchers cooled and sent a sodium cluster about 8 nm in diameter (≈170,000 amu) through an interferometer to reveal wave-like interference, marking the largest object observed in quantum superposition and showing quantum mechanics applies to sizeable nanoparticles despite decoherence in larger systems.

via ScienceAlert|

#decoherence #interferometer #nanoparticles

technology3 months ago•12 min saved

Masers Rise Again: From Microwave Marvel to Room-Temperature Quantum Possibility

Masers are the microwave cousins of lasers that power cryogenic amplifiers for deep-space signals, provide precise timekeeping with hydrogen and cesium clocks, and appear in natural astrophysical sources; advances in new materials could enable room-temperature masers and even chip-scale devices for quantum computing, signaling a potential revival beyond their historical role.

via Hackaday|

#maser #microwave #physics

science4 months ago•34 min saved

Quantum interference observed in sodium nanoclusters at 0.17 MDa

Researchers demonstrate quantum interference of sodium clusters containing thousands of atoms (mass >170 kDa) in a near-field Talbot–Lau interferometer using three UV gratings, achieving fringe visibilities that align with quantum predictions and yielding a macroscopicity value of μ = 15.5—the highest reported to date. This shows the quantum superposition principle persists at this unprecedented mass/size and provides a platform to test macrorealist modifications of quantum mechanics, with future work aiming to reach even larger masses (MDa range) as experimental techniques improve.

via Nature|

#interferometry #macroscopicity #matter-wave

business8 months ago•2 min saved

UK-US Tech and Nuclear Deals Highlight Strategic Partnerships

Microsoft, Google, and Nvidia are leading a $39 billion tech deal between the UK and US focused on advancing AI and quantum computing technologies.

via TipRanks|

#ai #business #google

science9 months ago•4 min saved

Scientists Develop Biological Qubits Using Proteins and Cells

Researchers at UChicago have engineered protein qubits within living cells, enabling quantum sensing directly in biological systems, which could revolutionize nanoscale MRI and biological research by allowing direct measurement of quantum properties in living tissues and molecules.

via Phys.org|

#biology #biotechnology #protein-qubits

technology10 months ago•4 min saved

Miniature laser enhances autonomous vehicle vision

Researchers have developed a compact, penny-sized laser that can significantly improve lidar technology for autonomous vehicles by providing faster, more accurate measurements, potentially leading to better navigation and smaller sensor packages.

via Live Science|

#autonomous-vehicles #laser #lidar

science11 months ago•2 min saved

Quantum Technologies Enable Unbreakable and Truly Random Number Generation

Researchers at the University of Colorado have developed a quantum-based random number generator that is highly resistant to tampering, using entangled photons and a publicly available hash chain to verify the randomness, significantly increasing security against potential spoofing.

via theregister.com|

#entanglement #hash-chain #quantum

physics2 years ago•7 min saved

"Unveiling the Enigmatic Wigner Crystal: Electron Visualization Breakthrough"

Physicists at Princeton University have successfully visualized the Wigner crystal, a crystal made entirely of electrons, for the first time using a scanning tunneling microscope. This breakthrough confirms a 90-year-old theory proposed by Eugene Wigner and could lead to the discovery of new quantum phases of matter. The researchers used pristine graphene and low temperatures to directly image the crystal, observing its triangular configuration and its ability to transition into an electron liquid phase. They also discovered the quantum nature of the crystal, including the "zero-point" motion of electrons, and are now investigating how the crystal melts and transitions into other exotic liquid phases.

via Phys.org|

#electrons #physics #princeton-university