Urbina, Juan Diego and Strunz, Walter T. and Viviescas, Carlos
Quantifying entanglement in multipartite conditional states of open
quantum systems by measurements of their photonic environment.
A key lesson of the decoherence program is that information flowing out from
an open system is stored in the quantum state of the surroundings.
Simultaneously, quantum measurement theory shows that the evolution of any open
system when its environment is measured is nonlinear and leads to pure states
conditioned on the measurement record. Here we report the discovery of a
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