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Speed limits to fluctuation dynamics

Physics

Speed limits to fluctuation dynamics

R. Hamazaki

Dive into groundbreaking research that unveils rigorous limits on fluctuation growth in non-equilibrium systems. This insightful study, conducted by Ryusuke Hamazaki, reveals a fascinating tradeoff between mean and fluctuation changes, with implications across quantum work extraction, observable dispersion, and entanglement growth in fermionic systems. Discover how this theory sets the stage for a quantitative understanding of fluctuation dynamics.

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Playback language: English
Abstract
This paper develops a theory establishing rigorous limits on the rate of fluctuation growth in non-equilibrium systems. It finds that an observable's fluctuation speed is upper-bounded by the fluctuation of a suitably chosen "velocity observable," revealing a tradeoff between mean and fluctuation changes. The theory's advantages are demonstrated in various contexts, including processes with significant observable dispersion, quantum work extraction, and entanglement growth in fermionic systems. The findings pave the way for a quantitative theory of fluctuation dynamics across diverse non-equilibrium systems.
Publisher
Communications Physics
Published On
Nov 06, 2024
Authors
Ryusuke Hamazaki
Tags
non-equilibrium systems
fluctuation dynamics
velocity observable
quantum work extraction
entanglement growth
observable dispersion
mean fluctuation tradeoff
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