| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1547111 | Physica E: Low-dimensional Systems and Nanostructures | 2008 | 6 Pages |
Abstract
We present a quantum theory of decoherence for a mesoscopic dissipative circuit. Using Kirchhoff laws of classical circuit and quantum theory, a Hamitonian of the circuit is derived. The dissipative circuit elements (external impedance, shunt resistors) are described using the Caldeira-Leggett model. The master equation for the dissipative circuit in the Born-Markov approximation is derived and brought into the well-known Bloch-Redfield formalism. Then, we study decoherence properties of multilevel dissipative quantum circuit. At a very low temperature, energy relaxation time and decoherence time of the circuit are give when adopting two-level state approximation.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Ying-Hua Ji, Jian-qiu Wang,