Tag

Quantum Measurement

All articles tagged with #quantum measurement

science1 month ago•6 min saved

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

science2 months ago•18 min saved

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

science6 months ago•13 min saved

Physicists Develop Thermometer to Measure 'Quantumness'

Physicists have developed a new method to detect quantum entanglement by measuring anomalous heat flow, which can serve as a non-destructive thermometer for quantumness, leveraging the unique properties of quantum mechanics to potentially improve quantum computing and explore gravity's quantum nature.

via WIRED|

#entanglement #heat-flow #quantum-measurement

science8 months ago•3 min saved

Quantum W State: Simultaneous Detection of Three Entangled Photons

Researchers at Kyoto and Hiroshima Universities have developed a new method to measure the W state of three entangled photons, enabling more efficient quantum state identification and advancing quantum communication and computing technologies.

via Phys.org|

#photonic-quantum-circuits #quantum-entanglement #quantum-measurement

science9 months ago•4 min saved

Physicists Resolve 90-Year-Old Quantum Damped Oscillator Puzzle

University of Vermont physicists have solved a 90-year-old problem by developing an exact quantum model of damped harmonic oscillators, akin to vibrating guitar strings at the atomic scale, using advanced mathematical techniques that could lead to ultra-precise quantum measurements and sensors.

via Phys.org|

#damped-harmonic-oscillator #heisenberg-uncertainty #lamb-model

science11 months ago•5 min saved

Breakthrough in Quantum Navigation Using 3D Atomic Acceleration

CU Boulder scientists developed a novel quantum device using cold atoms and lasers to measure 3D acceleration simultaneously, a breakthrough that could enhance navigation systems for various vehicles. The device employs a Bose-Einstein Condensate and AI-driven laser adjustments, and while still in early stages, it shows promise for future applications in navigation and sensing technology.

via SciTechDaily|

#3d-acceleration #atom-interferometer #cu-boulder

science-and-technology2 years ago•2 min saved

"Detecting Quantum Behavior in Macroscopic Objects: A Breakthrough by Physicists"

Physicists have proposed a novel experiment to detect quantum behavior in large objects, challenging the traditional view that quantum effects are limited to tiny particles. The experiment involves observing the motion of an object, such as a ball on a pendulum, and flashing light at different times to determine if quantum behavior is occurring. If successful, this could provide evidence of quantum fuzziness on a larger scale and potentially be tested using the mirrors at the Laser Interferometer Gravitational-Wave Observatory (LIGO) in the US.

via Slashdot|

#experimental-setup #large-objects #quantum-behavior

physics2 years ago•3 min saved

"Physicists Develop Experiment to Test Quantum Behavior in Macroscopic Objects"

Physicists from University College London, the University of Southampton, and the Bose Institute have proposed a novel approach to measure quantum behavior in larger objects, challenging the traditional view that quantum physics only applies at small scales. Their experiment involves observing the motion of an object on a pendulum and flashing light at different times to see if quantum behavior is occurring. If successful, this could extend the domain of quantum mechanics and test its validity for larger masses, potentially revolutionizing our understanding of the fundamental theory of nature.

via ScienceAlert|

#large-objects #physics #quantum-behavior