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Quantum Entanglement

All articles tagged with #quantum entanglement

New single-step W-state measurement could accelerate quantum teleportation and networks
science1 month ago

New single-step W-state measurement could accelerate quantum teleportation and networks

Researchers from Kyoto and Hiroshima universities demonstrated a symmetry-based entangled measurement for three-photon W states, enabling direct state identification in a single operation rather than resource-heavy tomography. By exploiting cyclic shift symmetry and a Fourier-transform photonic network, the method can distinguish different W states with a stable, extended-running setup, potentially boosting quantum teleportation, secure communications, and distributed quantum computing, with plans to scale to larger systems and chip integration.

via SciTechDaily|
#photonic-networks#quantum-entanglement#quantum-measurement
Birth of quantum entanglement captured in attoseconds
science1 month ago

Birth of quantum entanglement captured in attoseconds

Researchers directly measured the birth of quantum entanglement on attosecond timescales by exciting atoms with intense laser pulses, showing the departure timing of one electron is linked to the energy state of the remaining electron (roughly 232 attoseconds on average). They developed a two-laser measurement protocol to capture this ultrafast entanglement, with potential implications for quantum technologies and communications.

via Earth.com|
#attoseconds#physics#quantum-entanglement
Faster-than-light darkness, evolving humans, and fatter polar bears headline this week in science
science1 month ago

Faster-than-light darkness, evolving humans, and fatter polar bears headline this week in science

This week’s science roundup covers the first observation of singularities in combined light and sound waves traveling faster than light, the discovery of quantum entanglement between moving atoms, ongoing debates about the universe’s expansion and a seven‑dimensional twist to Hawking’s information paradox, new evidence that natural selection has continued shaping West Eurasians over the last 10,000 years (traits like lighter skin and red hair), and reports that some polar bears are adapting to melting habitats by getting fatter, highlighting a broad mix of physics, cosmology, evolution, and wildlife research.

via Live Science|
#black-holes#faster-than-light#human-evolution
Momentum-Entangled Helium Atoms Demonstrate Quantum Link in Motion
science1 month ago

Momentum-Entangled Helium Atoms Demonstrate Quantum Link in Motion

Physicists cooled helium to near absolute zero to form a Bose-Einstein condensate, split it with lasers to produce entangled atom pairs, and used a Rarity-Tapster interferometer with single-atom momentum detection to demonstrate Bell-like correlations in the motion of two massive helium atoms—the first time entanglement has been shown in the momentum of moving mass. The result, a long-sought confirmation of textbook quantum mechanics, hints at future ultra-precise quantum sensors and tests of quantum gravity, with plans to explore momentum–mass entanglement by colliding helium-3 and helium-4 isotopes.

via Yahoo|
#helium-4#massive-particles#momentum
Attosecond timing clocks the birth of quantum entanglement
science2 months ago

Attosecond timing clocks the birth of quantum entanglement

Researchers from China and TU Wien directly measured the ultrafast onset of quantum entanglement on attosecond timescales by using intense laser pulses to eject and track electrons. They show the birth time of the departing electron is not definite and links to the energy state of the remaining electron, with typical timing differences around 232 attoseconds. A two-laser protocol enables these measurements, potentially enabling lab studies of ultrafast entanglements and informing future quantum technologies such as cryptography and computing. The findings were published in Physical Review Letters.

via Earth.com|
#attoseconds#laser-physics#quantum-entanglement
Researchers Reveal Rich 48-Dimensional Topology Inside Entangled Photons
physics2 months ago

Researchers Reveal Rich 48-Dimensional Topology Inside Entangled Photons

Researchers at the University of the Witwatersrand and collaborators demonstrated that entangled photons carry a hidden, high-dimensional topology—up to 48 dimensions—with over 17,000 distinct signatures. This topology arises from a single property of light, its orbital angular momentum, enabling a new high-dimensional encoding scheme for quantum information. Because OAM spans many values, the resulting topology can be very rich, and the effect can be observed using standard SPDC lab setups, potentially improving the robustness of future quantum technologies.

via ScienceDaily|
#high-dimensional-states#orbital-angular-momentum#photonics
Entangled Photons Unveil a 48-Dimensional Topology
science2 months ago

Entangled Photons Unveil a 48-Dimensional Topology

Physicists from the University of the Witwatersrand and Huzhou University report that entangled photons produced via spontaneous parametric downconversion harbor a rich, high-dimensional topological structure within their spatial degrees of freedom, specifically in orbital angular momentum. They observed a topology spanning 48 dimensions with over 17,000 distinct signatures, suggesting new ways to encode and protect quantum information against noise. Because OAM is inherently high-dimensional, the topology is also effectively limitless in practice, and these effects can be explored with standard quantum optics lab setups, offering a practical path toward more stable quantum technologies.

via SciTechDaily|
#orbital-angular-momentum#quantum-entanglement#quantum-information
Quantum Technique Enables Drones and Robots to Communicate in Signal-Lost Areas
technology5 months ago

Quantum Technique Enables Drones and Robots to Communicate in Signal-Lost Areas

Researchers at Virginia Tech have developed a quantum-based communication method called eQMARL that allows AI-driven machines like drones and robots to coordinate without transmitting signals, using quantum entanglement to maintain secure and reliable communication even in signal-lost environments. While promising for future disaster response and secure communications, practical deployment is still 10-15 years away due to current hardware limitations.

via Interesting Engineering|
#drone-communication#multi-agent-ai#quantum-computing
Einstein's Mistakes That Led to Breakthroughs in Physics
science7 months ago

Einstein's Mistakes That Led to Breakthroughs in Physics

Albert Einstein, despite his groundbreaking contributions to physics, made several errors or had misconceptions, such as doubting the existence of gravitational waves and black holes, and attempting unification of forces without quantum mechanics. However, his willingness to revise his views and challenge established ideas significantly advanced scientific understanding, demonstrating his perceptive and cautious approach to exploring the universe.

via Gizmodo|
#black-holes#einstein#gravitational-waves