Tag

Entanglement

All articles tagged with #entanglement

science9 days ago•1 min saved

Kyoto and Hiroshima Researchers Achieve First Experimental W-State Quantum Measurement

Researchers at Kyoto University and Hiroshima University have experimentally demonstrated a new method to identify W-state quantum entanglement, a capability that had remained unproven for over 25 years. By utilizing cyclic shift symmetry and photonic quantum circuits, the team successfully distinguished three-photon W states with high fidelity. This breakthrough offers a more efficient alternative to traditional quantum tomography, potentially accelerating the development of quantum teleportation, communication protocols, and measurement-based computing. The team plans to scale this technique to larger photon numbers and integrate it into compact on-chip devices.

via ScienceDaily|

#entanglement #optical-circuits #photonics

science24 days ago•7 min saved

100-Channel Quantum Teleportation Demonstrates Scalable Quantum Networking

Physicists teleported a 100-mode quantum image by encoding it into a 10×10 grid of spatial light modes and processing all channels in parallel with an all-optical system, achieving an average fidelity of 0.60 across channels—above the classical limit of 0.52—showing a path toward scalable, high-capacity quantum networks.

via ScienceAlert|

#entanglement #fidelity #parallel-teleportation

science25 days ago•8 min saved

Higgs decay at the LHC uncovers entangled Z-boson pair, edging toward a quantum discovery

Physicists at the LHC report strong evidence (4.7 sigma) that a Higgs-boson decay into two Z bosons yields entangled spins, with Z bosons acting as qutrits. The analysis uses the rare Higgs→ZZ→4 leptons channel to infer the spins and show entanglement, including the involvement of a virtual Z due to energy constraints. While not hitting the 5-sigma discovery threshold, the result published in Physical Review Letters provides the strongest evidence to date for entanglement between Z bosons produced in Higgs decays.

via ScienceAlert|

#entanglement #higgs-boson #quantum-mechanics

science1 month ago•5 min saved

Quantum Internet Proves Real-World Feasibility Across 38 Miles of Fiber

NIST researchers transmitted polarization-entangled photons across 62 kilometers (38.5 miles) of existing, above-ground fiber in real-world conditions, maintaining entanglement despite environmental noise by using a laser reference to calibrate corrections. The setup operated with 200–1,500 entangled photons per second, showing feasibility for practical quantum networks and potential uses in quantum-secure communications and distributed telescopes, though faster hardware and better software are needed for a full quantum internet.

via ScienceAlert|

#entanglement #fiber-optic #nist

science2 months ago•14 min saved

Quantum Basics: From Spooky Action to a New Computing Era

A plain‑language primer on quantum ideas: at tiny scales particles can be in superpositions and only take a definite state when measured, while entangled particles remain linked across distances. These quirks enable qubits that can encode many possibilities in parallel, potentially solving problems in drug design, materials science and cryptography far faster than classical computers. Real-world quantum tech is still fragile and not a substitute for everyday tasks; nonetheless, progress raises both exciting capabilities and security/ethical questions as encryption faces new risks and quantum‑safe networks develop.

via The Conversation|

#cryptography #entanglement #quantum-computing

science3 months ago•93 min saved

Real-number quantum mechanics passes the test, matching all standard predictions

Physicists built a working version of quantum mechanics using only real numbers, recreating all predictions of the standard theory by replacing the usual complex-number tensor product with a real-number rule and a bookkeeping flag system. The approach shows complex numbers aren’t fundamental to quantum mechanics, though the work currently covers finite systems and does not alter experimental predictions.

via Live Science|

#complex-numbers #entanglement #quantum-mechanics

science3 months ago•4 min saved

Quantum Mechanics: From Paradox to Everyday Technology

A Science perspective shows how quantum mechanics evolved from a puzzling 20th‑century idea to the foundation of lasers, microchips, secure communications, and emerging quantum computers, driven by coherence and entanglement; the piece highlights quantum heat engines that may exceed classical limits and notes expanding applications in biology, gravity, and turbulence, with open questions about quantizing gravity and the future impact of quantum technologies.

via ScienceDaily|

#entanglement #quantum-coherence #quantum-computing

entertainment3 months ago•1 min saved

Cara Delevingne: We Were Entangled with Amber Heard During Her Divorce from Johnny Depp

Cara Delevingne revealed on the Louis Theroux Podcast that she and Amber Heard were romantically entangled for a time during Heard’s divorce from Johnny Depp, a dynamic Depp reportedly found jealousy-worthy; Delevingne also discusses her current relationship, her desire to start a family, and her views on engagement versus traditional marriage.

via USA Today|

#amber-heard #cara-delevingne #divorce

science4 months ago•5 min saved

Quantum Entanglement Delivers Certifiably Perfect Randomness

ETH Zurich researchers used a Bell-test experiment with entangled qubits separated by 30 meters and performed over a billion trials in about nine hours to demonstrate randomness amplification that transforms imperfect randomness into certifiably perfect randomness, a device-independent result that could underpin future cryptography and security systems. The work, published in Nature 2026, shows randomness that remains truly unpredictable under rigorous analysis, surpassing previous RNGs that depended on trusted hardware.

via ScienceAlert|

#bell-test #cryptography #entanglement

science5 months ago•5 min saved

Desk Staples Reveal Reversible, Shape-Shifting Material Behavior

CU Boulder researchers found that ordinary office staples exhibit a controllable switch between rigid and flowing states driven by particle geometry and vibration. A two-legged staple geometry yields strong interlocking; 90-degree crowns initially entangle more densely than 20-degree variants, but after about 36,000 vibration cycles the 20-degree staples gain much stronger bonds, enabling tensile strengths over 100%. Under confinement, vibration promotes entanglement; on open surfaces it disperses into a flat layer. This reversible behavior could enable assembly/disassembly of structures for construction and robotics, with ongoing work exploring even more effective legged designs.

via Indian Defence Review|

#entanglement #interlocking #reversible

science5 months ago•7 min saved

Quantum Jamming Tests the Limits of Entanglement and Causality

Researchers are exploring quantum jamming—a hypothetical way to alter entanglement without breaking causality—to probe whether deeper principles than quantum mechanics (like no-signaling) govern reality. This work challenges the foundations of device-independent quantum key distribution, which relies on monogamy of entanglement, by asking whether such jamming could undermine security or reveal new physics. Scientists including Ramanathan, Weilenmann, Popescu, Grunhaus, Eckstein, and others are collaborating to identify fundamental rules that constrain or permit these phenomena and to understand what a more complete theory of nature might look like.

via Quanta Magazine|

#causality #device-independent #entanglement

science5 months ago•38 min saved

Vacuum’s Hidden heft: researchers link real quarks to empty space

Physicists at Brookhaven’s RHIC used high-energy proton collisions to energize virtual quark–antiquark pairs in the quantum vacuum, turning them into real, spin‑correlated strange quark–antiquark pairs. The pairs’ spins remained aligned as they formed lambda hyperons, and were traced by the STAR detector, providing a direct link between vacuum fluctuations and observable matter and offering clues about how protons acquire most of their mass.

via Yahoo|

#entanglement #proton-mass #quantum-vacuum

technology5 months ago•7 min saved

Quantum Mechanics: From Paradox to Tech Powerhouse

Quantum mechanics has evolved from a puzzling theory to the backbone of modern technology, powering lasers, chips, quantum computing, and secure communications. Texas A&M physicist Marlan Scully surveys the journey—from Schrödinger’s cat to coherence and entanglement enabling new sensors and cryptography, to quantum heat engines that can exceed classical limits. The reach extends into biology and cosmology, while open questions about unifying gravity with quantum theory promise a continued scientific adventure.

via SciTechDaily|

#entanglement #lasers #quantum-coherence

science8 months ago•23 min saved

Quantum states are real: the 2012 theorem reshaping quantum reality

The article argues that the Pusey-Barrett-Rudolph (PBR) theorem, proven in 2012, shows the quantum state must be ontic (a property of reality) under three basic assumptions, ruling out epistemic hidden-variable interpretations and implying the wavefunction has real physical status. This places quantum foundations on firmer ground, clarifies debates about reality vs. knowledge in quantum mechanics, and underscores the theorem’s impact alongside ongoing quantum technologies that exploit entanglement and nonlocality.

via Big Think|

#entanglement #hidden-variables #pbr-theorem

science9 months ago•29 min saved

Silicon Quantum Computing Achieves Record-Setting 11-Qubit Processor

Researchers have developed an 11-qubit atom processor in silicon, demonstrating high-fidelity single- and two-qubit gates, and the ability to generate entanglement across multiple nuclear spins within and between registers, marking a significant step towards scalable quantum error correction in silicon-based quantum processors.

via Nature|

#atom-processor #entanglement #fidelity