2013 Fiscal Year Final Research Report
Constructing Formula of Nonequilibrium Physics by using Quantum Continuous Measurement and Quantum Field Theory
| Project/Area Number |
24840015
|
|---|
| Research Category |
Grant-in-Aid for Research Activity Start-up
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
Mathematical physics/Fundamental condensed matter physics
|
|---|
| Research Institution | Kyoto University |
|---|
Principal Investigator |
YU Watanabe 京都大学, 基礎物理学研究所, 助教 (80633271)
|
|---|
| Project Period (FY) |
2012-08-31 – 2014-03-31
|
| Keywords | 量子エレクトロニクス / 量子情報 / 物性基礎論 / 情報基礎 |
|---|
| Research Abstract |
We derive integral quantum fluctuation theorems and quantum Jarzynski equalities for a feedback-controlled system and a memory which registers outcomes of the measurement. The generalized second law of thermodynamics under measurement and feedback control is reproduced from these equalities. We also show that entanglement can be utilized to extract the thermodynamic work beyond classical correlation via feedback control. We propose new hypothesis for thermalization of isolated quantum systems, and show the hypothesis gives larger contribution than well known hypothesis to the thermalization. We also show that the system thermalize even if it is integrable.
We analyze a simultaneous continuous measurement of photon-counting and homodyne detection. A formula for the expectation values of the homodyne records conditioned on a photon-counting event is also derived, which quantitatively describes the measurement backaction of photon-counting on the homodyne output.
|
Research Products
(17 results)
