120 citations · 3.3k across the 160 of their papers we have counts for
6 papers · 2 filters
A Study on the Sudden Death of Entanglement
H. T. Cui, K. Li, X. X. Yi
The dynamics of entanglement and the phenomenon of entanglement sudden death (ESD) \cite{yu} are discussed in bipartite systems, measured by Wootters Concurrence. Our calculation s…
Concurrence of superposition
Chang-shui Yu, X. X. Yi, He-shan Song
The bounds on concurrence of the superposition state in terms of those of the states being superposed are studied in this paper. The bounds on concurrence are quite different from…
Dissipation Effects in Hybrid Systems
X. X. Yi, W. Wang
The dissipation effect in a hybrid system is studied in this Letter. The hybrid system is a compound of a classical magnetic particle and a quantum single spin. Two cases are consi…
Geometric Phase and Quantum Phase Transition in the Lipkin-Meshkov-Glick model
H. T. Cui, K. Li, X. X. Yi
The relation between the geometric phase and quantum phase transition has been discussed in the Lipkin-Meshkov-Glick model. Our calculation shows the ability of geometric phase of…
Quantum heat engine with continuum working medium
S. Li, H. Wang, Y. D. Sun +1
We introduce a new quantum heat engine, in which the working medium is a quantum system with a discrete level and a continuum. Net work done by this engine is calculated and discus…
Geometric phase in open systems: beyond the Markov approximation and weak coupling limit
X. X. Yi, D. M. Tong, L. C. Wang +2
Beyond the quantum Markov approximation and the weak coupling limit, we present a general theory to calculate the geometric phase for open systems with and without conserved energy…