Next Article in Journal
Connection of Turbulence with Polytropic Index in the Solar Wind Proton Plasma
Previous Article in Journal
On the Impossibility of First-Order Phase Transitions in Systems Modeled by the Full Euler Equations
Previous Article in Special Issue
State Transfer via On-Line State Estimation and Lyapunov-Based Feedback Control for a N-Qubit System
Open AccessArticle

Quantum Dynamics in a Fluctuating Environment

School of Science, Shandong Jianzhu University, Jinan 250101, China
Entropy 2019, 21(11), 1040;
Received: 22 September 2019 / Revised: 17 October 2019 / Accepted: 23 October 2019 / Published: 25 October 2019
(This article belongs to the Special Issue Open Quantum Systems (OQS) for Quantum Technologies)
We theoretically investigate the dynamics of a quantum system which is coupled to a fluctuating environment based on the framework of Kubo-Anderson spectral diffusion. By employing the projection operator technique, we derive two types of dynamical equations, namely, time-convolution and time-convolutionless quantum master equations, respectively. We derive the exact quantum master equations of a qubit system with both diagonal splitting and tunneling coupling when the environmental noise is subject to a random telegraph process and a Ornstein-Uhlenbeck process, respectively. For the pure decoherence case with no tunneling coupling, the expressions of the decoherence factor we obtained are consistent with the well-known existing ones. The results are significant to quantum information processing and helpful for further understanding the quantum dynamics of open quantum systems. View Full-Text
Keywords: quantum dynamics; open quantum systems; environmental fluctuations quantum dynamics; open quantum systems; environmental fluctuations
Show Figures

Figure 1

MDPI and ACS Style

Cai, X. Quantum Dynamics in a Fluctuating Environment. Entropy 2019, 21, 1040.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Back to TopTop