Clausius Relation for Active Particles: What Can We Learn from Fluctuations
Many kinds of active particles, such as bacteria or active colloids, move in a thermostatted fluid by means of self-propulsion. Energy injected by such a non-equilibrium force is eventually dissipated as heat in the thermostat. Since thermal fluctuations are much faster and weaker than self-propulsi...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2017-07-01
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| Series: | Entropy |
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| Online Access: | https://www.mdpi.com/1099-4300/19/7/356 |
| _version_ | 1818014916689264640 |
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| author | Andrea Puglisi Umberto Marini Bettolo Marconi |
| author_facet | Andrea Puglisi Umberto Marini Bettolo Marconi |
| author_sort | Andrea Puglisi |
| collection | DOAJ |
| description | Many kinds of active particles, such as bacteria or active colloids, move in a thermostatted fluid by means of self-propulsion. Energy injected by such a non-equilibrium force is eventually dissipated as heat in the thermostat. Since thermal fluctuations are much faster and weaker than self-propulsion forces, they are often neglected, blurring the identification of dissipated heat in theoretical models. For the same reason, some freedom—or arbitrariness—appears when defining entropy production. Recently three different recipes to define heat and entropy production have been proposed for the same model where the role of self-propulsion is played by a Gaussian coloured noise. Here we compare and discuss the relation between such proposals and their physical meaning. One of these proposals takes into account the heat exchanged with a non-equilibrium active bath: such an “active heat” satisfies the original Clausius relation and can be experimentally verified. |
| first_indexed | 2024-04-14T06:50:11Z |
| format | Article |
| id | doaj.art-501bc11aafe04c3086d3c79eca7a5032 |
| institution | Directory Open Access Journal |
| issn | 1099-4300 |
| language | English |
| last_indexed | 2024-04-14T06:50:11Z |
| publishDate | 2017-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Entropy |
| spelling | doaj.art-501bc11aafe04c3086d3c79eca7a50322022-12-22T02:07:02ZengMDPI AGEntropy1099-43002017-07-0119735610.3390/e19070356e19070356Clausius Relation for Active Particles: What Can We Learn from FluctuationsAndrea Puglisi0Umberto Marini Bettolo Marconi1CNR-ISC and Dipartimento di Fisica, Sapienza Università di Roma, p.le A. Moro 2, 00185 Roma, ItalyScuola di Scienze e Tecnologie, Università di Camerino, Via Madonna delle Carceri, 62032 Camerino, ItalyMany kinds of active particles, such as bacteria or active colloids, move in a thermostatted fluid by means of self-propulsion. Energy injected by such a non-equilibrium force is eventually dissipated as heat in the thermostat. Since thermal fluctuations are much faster and weaker than self-propulsion forces, they are often neglected, blurring the identification of dissipated heat in theoretical models. For the same reason, some freedom—or arbitrariness—appears when defining entropy production. Recently three different recipes to define heat and entropy production have been proposed for the same model where the role of self-propulsion is played by a Gaussian coloured noise. Here we compare and discuss the relation between such proposals and their physical meaning. One of these proposals takes into account the heat exchanged with a non-equilibrium active bath: such an “active heat” satisfies the original Clausius relation and can be experimentally verified.https://www.mdpi.com/1099-4300/19/7/356active particlesentropy productionClausius relation |
| spellingShingle | Andrea Puglisi Umberto Marini Bettolo Marconi Clausius Relation for Active Particles: What Can We Learn from Fluctuations Entropy active particles entropy production Clausius relation |
| title | Clausius Relation for Active Particles: What Can We Learn from Fluctuations |
| title_full | Clausius Relation for Active Particles: What Can We Learn from Fluctuations |
| title_fullStr | Clausius Relation for Active Particles: What Can We Learn from Fluctuations |
| title_full_unstemmed | Clausius Relation for Active Particles: What Can We Learn from Fluctuations |
| title_short | Clausius Relation for Active Particles: What Can We Learn from Fluctuations |
| title_sort | clausius relation for active particles what can we learn from fluctuations |
| topic | active particles entropy production Clausius relation |
| url | https://www.mdpi.com/1099-4300/19/7/356 |
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