Generalized energy equipartition in harmonic oscillators driven by active baths
arXiv:1409.3929 · doi:10.1103/PhysRevLett.113.238303
Abstract
We study experimentally and numerically the dynamics of colloidal beads confined by a harmonic potential in a bath of swimming E. coli bacteria. The resulting dynamics is well approximated by a Langevin equation for an overdamped oscillator driven by the combination of a white thermal noise and an exponentially correlated active noise. This scenario leads to a simple generalization of the equipartition theorem resulting in the coexistence of two different effective temperatures that govern dynamics along the flat and the curved directions in the potential landscape.
4 pages, 3 figures
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Cited by in corpus (4)
- Multidimensional Stationary Probability Distribution for Interacting Active Particles
- Entropy production of active particles and for particles in active baths
- Clausius relation for active particles: what can we learn from fluctuations?
- Elasticity-based polymer sorting in active fluids: A Brownian dynamics study