Extracting work from a single heat bath: a case study of a Brownian particle under an external magnetic field in the presence of information
| Autor: | A. M. Jayannavar, Arnab Saha, P. S. Pal, Shubhashis Rana |
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| Rok vydání: | 2014 |
| Předmět: |
Physics
Work (thermodynamics) Statistical Mechanics (cond-mat.stat-mech) Field (physics) media_common.quotation_subject Mathematical analysis FOS: Physical sciences Second law of thermodynamics Models Theoretical Upper and lower bounds Elasticity Magnetic field Classical mechanics Magnetic Fields Position (vector) Harmonic Thermodynamics Condensed Matter - Statistical Mechanics Brownian motion media_common |
| Zdroj: | Physical review. E, Statistical, nonlinear, and soft matter physics. 90(2) |
| ISSN: | 1550-2376 |
| Popis: | Work can be extracted from a single bath beyond the limit set by the second law by performing measurement on the system and utilising the acquired information. As an example we studied a Brownian particle confined in a two dimensional harmonic trap in presence of magnetic field, whose position co-ordinates are measured with finite precision. Two separate cases are investigated in this study - (A) moving the center of the potential and (B) varying the stiffness of the potential. Optimal protocols which extremise the work in a finite time process are explicitly calculated for these two cases. For Case-A, we show that even though the optimal protocols depend on magnetic field, surprisingly, extracted work is independent of the field. For Case-B, both the optimal protocol and the extracted work depend on the magnetic field. However, the presence of magnetic field always reduces the extraction of work. 11 pages, 4 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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