| Speaker: | Masahito Ueda (U Tokyo) |
|---|---|
| Title: | Maxwell's Demon: Introduction to Information Thermodynamics |
| Date (JST): | Wed, Jun 22, 2011, 13:30 - 15:00 |
| Place: | Seminar Room A |
| Abstract: |
The second law of thermodynamics presupposes a clear-cut distinction between the controllable and uncontrollable degrees of freedom by means of macroscopic operations. The state-of-the-art technologies in quantum information and nano-science seem to force us to abandon such a notion in favor of the distinction between the accessible and inaccessible degrees of freedom. In this talk, I will discuss the implications of this paradigm shift by focusing on how the second law of thermodynamics can be generalized in the presence of a feedback control [1]. I will also discuss the minimum work required for measurement and erasure of information [2]. The Jarzynski equality has to be generalized in the presence of feedback control [3], as confirmed experimentally using polystyrene beads [4]. A quantum generalization of the Szilard engine will also be discussed [5]. References [1] T. Sagawa and M. Ueda, Phys. Rev. Lett. 100, 080403 (2008). [2] T. Sagawa and M. Ueda, Phys. Rev. Lett. 102, 250602 (2009); 106, 189901 (2011). [3] T. Sagawa and M. Ueda, Phys. Rev. Lett. 104, 090602 (2010). [4] S. Toyabe, T. Sagawa, M. Ueda, E. Muneyuki, and M. Sano, Nature Physics, 6, 988 (2010). [5] S. W. Kim, T. Sagawa, S. De Liberato, and M. Ueda, Phys. Rev. Lett. 106, 070401 (2011). |
