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Scientists Find Way to Overcome Quantum Limit in GWDs

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COPENHAGEN, Sept. 7, 2018 — Researchers at the Neils Bohr Institute (NBI) at the University of Copenhagen are developing equipment that will enable gravitational wave detectors (GWDs) to monitor and carry out measurements in an eight times bigger volume of space than what is currently possible. The work to improve the sensitivity of GWDs is based on the team’s previous observations about Quantum Back Action (QBA), a phenomenon that occurs when a light is shined on an object, leading to the object being ‘kicked’ in random directions by photons. QBA can limit the accuracy with which measurements...Read full article

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    Published: September 2018
    Glossary
    quantum
    The term quantum refers to the fundamental unit or discrete amount of a physical quantity involved in interactions at the atomic and subatomic scales. It originates from quantum theory, a branch of physics that emerged in the early 20th century to explain phenomena observed on very small scales, where classical physics fails to provide accurate explanations. In the context of quantum theory, several key concepts are associated with the term quantum: Quantum mechanics: This is the branch of...
    quantum entanglement
    Quantum entanglement is a phenomenon in quantum mechanics where two or more particles become correlated to such an extent that the state of one particle instantly influences the state of the other(s), regardless of the distance separating them. This means that the properties of each particle, such as position, momentum, spin, or polarization, are interdependent in a way that classical physics cannot explain. When particles become entangled, their individual quantum states become inseparable,...
    astronomy
    The scientific observation of celestial radiation that has reached the vicinity of Earth, and the interpretation of these observations to determine the characteristics of the extraterrestrial bodies and phenomena that have emitted the radiation.
    Research & TechnologyEuropeeducationNeils Bohr InstituteUniversity of CopenhagenEugene Polzikquantumquantum entanglementgravitational wave detectorsLIGOquantum metrologySensors & Detectorsastronomy

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