Experimental quantum process tomography of non-trace-preserving maps
Irene Bongioanni, Linda Sansoni, Fabio Sciarrino, Giuseppe Vallone, Paolo Mataloni · Physical Review A · 2010
The ability of fully reconstructing quantum maps is a fundamental task of quantum information, in particular when coupling with the environment and experimental imperfections of devices are taken into account. In this context, we carry out a quantum process tomography approach for a set of non-trace-preserving maps. We introduce an operator $\mathcal{P}$ to characterize the state-dependent probability of success for the process under investigation. We also evaluate the result of approximating the process with a trace-preserving one.