2004/01/01 by Yang Gao, Y. B. Gao, C. P. Sun +2 · 1 citation
Computer Science · Engineering · Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Earthquake and Tsunami Effects #Quantum Information and Cryptography #Quantum Mechanics and Applications #Vibration and Dynamic Analysis #quant-ph
paper · pdf · doi:10.1103/physreve.75.011105
published as Phys. Rev. E 75, 011105 (2007) · 6 pages, 4 figures
openalex publication_date 2004/01/01 · arxiv created 2006/11/19 · arxiv updated 2013/05/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/04
The fluctuation-dissipation relation is well known for a quantum open system with energy dissipation. In this paper a similar underlying relation is found between the bath fluctuation and the dephasing of the quantum open system, for which energy is conserved, but the information is leaking into the bath. To obtain this relation we revisit the universal, but simple dephasing model with a quantum nondemolition interaction between the bath and the open system. Then we show that the decoherence factor describing the dephasing process is factorized into two parts, to indicate the two sources of dephasing, the vacuum quantum fluctuation, and the thermal excitations defined in the initial state of finite temperature.