Pulsed homodyne quantum tomography usually requires a high detection efficiency, limiting its applicability in quantum optics. Here, it is shown that the presence of low detection efficiency (<50%) does not prevent the tomographic reconstruction of quantum states of light, specifically, of Gaussian states. This result is obtained by applying the so-called ‘minimax’ adaptive reconstruction of the Wigner function to pulsed homodyne detection. In particular, we prove, by both numerical and real experiments, that an effective discrimination of different Gaussian quantum states can be achieved. Our finding paves the way to a more extensive use of quantum tomographic methods, even in physical situations in which high detection efficiency is unattainable.
|Titolo:||Pulsed homodyne Gaussian quantum tomography with low detection efficiency|
|Parole Chiave:||homodyne detection; quantum optics; quantum state reconstruction|
|Settore Scientifico Disciplinare:||Settore FIS/03 - Fisica della Materia|
|Data di pubblicazione:||7-apr-2014|
|Digital Object Identifier (DOI):||10.1088/1367-2630/16/4/043004|
|Appare nelle tipologie:||01 - Articolo su periodico|