TY  - JOUR
AB  - Active matter systems are driven out of equilibrium by conversion of energy into directed motion locally on the level of the individual constituents. In the spirit of a minimal description, active matter is often modeled by so-called active Ornstein-Uhlenbeck particles an extension of passive Brownian motion where activity is represented by an additional fluctuating non-equilibrium "force" with simple statistical properties (Ornstein-Uhlenbeck process). While in passive Brownian motion, entropy production along trajectories is well-known to relate to irreversibility in terms of the log-ratio of probabilities to observe a certain particle trajectory forward in time in comparison to observing its time-reversed twin trajectory, the connection between these concepts for active matter is less clear. It is therefore of central importance to provide explicit expressions for the irreversibility of active particle trajectories based on measurable quantities alone, such as the particle positions. In this technical note we derive a general expression for the irreversibility of AOUPs in terms of path probability ratios (forward vs. backward path), extending recent results from [PRX 9, 021009 (2019)] by allowing for arbitrary initial particle distributions and states of the active driving.
DA  - 2021
DO  - 10.3389/fphy.2020.582992
KW  - active matter
KW  - stochastic thermodynamics
KW  - non-equilibrium
KW  - active
KW  - Brownian motion
KW  - active Ornstein-Uhlenbeck particle
KW  - irreversibility
KW  - path integrals
LA  - eng
PY  - 2021
SN  - 2296-424X
T2  - Frontiers in Physics
TI  - Irreversibility in Active Matter: General Framework for Active Ornstein-Uhlenbeck Particles
UR  - https://nbn-resolving.org/urn:nbn:de:0070-pub-29513031
Y2  - 2024-11-22T11:39:45
ER  -