Fluctuations & noise is a research area concerned with stochastic variability in physical, biological, and engineered systems, focusing on the origin, characterization, and consequences of random deviations from deterministic behavior. It encompasses thermal, quantum, and environmental noise, as well as intrinsic fluctuations in nonequilibrium and complex systems. Researchers study statistical properties (e.g., correlation functions, power spectra, probability distributions), fluctuation–dissipation relations, and noise-induced phenomena such as stochastic resonance, pattern formation, and rare events. The field integrates methods from statistical physics, stochastic processes, information theory, and nonlinear dynamics, with applications spanning condensed matter, soft matter, neuroscience, climate, and nanoscale devices.
A newly discovered set of mathematical equations describes how to turn any sequence of random events into a clock, scientists at King's College London reveal. The paper is published in the journal Physical Review X.
General Physics
Sep 11, 2025
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128
Vibrations are everywhere—from the hum of machinery to the rumble of transport systems. Usually, these random motions are wasted and dissipated without producing any usable work.
General Physics
Sep 11, 2025
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36
Quantum computers promise enormous computational power, but the nature of quantum states makes computation and data inherently "noisy." Rice University computer scientists have developed algorithms that account for noise ...
Quantum Physics
Sep 3, 2025
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64
Medical imaging methods such as ultrasound and MRI are often affected by background noise, which can introduce blurring and obscure fine anatomical details in the images. For clinicians who depend on medical images, background ...
Optics & Photonics
Aug 12, 2025
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100
Quantum stochastic rectification is a process observed in some physical systems, which entails the conversion of random quantum fluctuations (i.e., quantum noise) and a small oscillating signal, such as a weak alternating ...
Nanoparticles—the tiniest building blocks of our world—are constantly in motion, bouncing, shifting, and drifting in unpredictable paths shaped by invisible forces and random environmental fluctuations.
Nanophysics
Jul 15, 2025
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As the world's energy needs for computing and artificial intelligence continue to increase, developing alternative low-power solutions to traditional computing becomes crucial. Devices that reliably generate randomness, or ...
Nanophysics
May 20, 2025
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146
Picture yourself at a busy pedestrian crossing. When the light is red, everyone waits—until one person starts to cross. Soon, others follow, and eventually everyone follows the crowd and crosses. Amsterdam physicists have ...
General Physics
Apr 30, 2025
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73
In a new Physical Review Letters study, researchers propose an experimental approach that could finally determine whether gravity is fundamentally classical or quantum in nature.
In nature, phenomena in which multiple fluctuations occur in a coupled manner are frequently observed. For example, in large earthquakes, cases of them occurring consecutively in adjacent regions have been reported. When ...
Plasma Physics
Jan 22, 2025
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