Journal
PHYSICAL REVIEW A
Volume 102, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.102.052404
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Funding
- Ministero dell'Istruzione, dell'Universita e della Ricerca Grant of Excellence Departments (ARTICOLO 1, COMMI 314-337 LEGGE 232/2016)
- Quantera project QuICHE
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We present an experimental method to detect lower bounds to the quantum capacity of two-qubit communication channels. We consider an implementation with polarization degrees of freedom of two photons and report on the efficiency of such a method in the presence of correlated noise for varying values of the correlation strength. The procedure is based on the generation of separable states of two qubits and local measurements at the output. We also compare the performance of the correlated two-qubit channel with the single-qubit channels corresponding to the partial trace on each of the subsystems, thus showing the beneficial effect of properly taking into account correlations to achieve a larger quantum capacity.
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