NDLI: Effect of preparation procedures on the system’s entanglement evolution

Content Provider	Springer Nature Link
Author	Xu, G. F. Liu, L. J. Tong, D. M.
Copyright Year	2012
Abstract	For an open quantum system, different preparation procedures result in the same evolution when the system and the environment are separate. However, there always exist initial correlations between the system and the environment. In this paper, we investigate how the different preparation procedures affect the entanglement evolution when there exist initial correlations. We here consider two important preparation procedures, the stochastic preparation procedure and the projective preparation procedure. We calculate the entanglements corresponding to each of the two procedures and examine the difference between them. Our result shows that the projective preparation procedure is more detrimental to entanglement evolution than the stochastic preparation procedure for this model. The entanglement difference arising from the two procedures is generally significant. Yet, we also find that the relative difference can be washed out in the case of weak interaction or low temperature, and it becomes smaller and smaller in an oscillating way as the time goes to infinity. We arrive at these points in two cases of environments, the independent environment and the common environment, both of which come to the same conclusion.
Starting Page	1
Ending Page	6
Page Count	6
File Format	PDF
ISSN	14346060
Journal	The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics
Volume Number	66
Issue Number	9
e-ISSN	14346079
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-09-12
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Quantum Information Physical Chemistry Quantum Information Technology, Spintronics Quantum Physics Atomic, Molecular, Optical and Plasma Physics Spectroscopy/Spectrometry Nonlinear Dynamics
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics

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