Energy as a Witness of Exact Entanglement Decoherence
Ting Yu · CERN Document Server (European Organization for Nuclear Research) · 2005
In this paper we show how to probe mixed state entanglement evolution by detections of the energy of a two-qubit system. In particular, we show that the energy of the system of interest can be used to signal the exact disentanglement of entangled states when coupled to thermal heat baths. Our results establish an explicit relation between the exact decoherence of an open quantum system and the energy transfer (or information loss) between the system and the environment.