Experimental Detection of Quantum Channels

Year: 2013

Authors: Orieux A., Sansoni L., Persechino M., Mataloni P., Rossi M., Macchiavello C.

Autors Affiliation: Dipartimento di Fisica, Sapienza Universita` di Roma, Piazzale Aldo Moro, 5, I-00185 Roma, Italy; Istituto Nazionale di Ottica, Consiglio Nazionale delle Ricerche (INO-CNR), Largo Enrico Fermi, 6, I-50125 Firenze, Italy; Dipartimento di Fisica and INFN-Sezione di Pavia, via Bassi 6, I-27100 Pavia, Italy

Abstract: We demonstrate experimentally the possibility of efficiently detecting properties of quantum channels and quantum gates. The experimentally realized quantum channel detection method has been recently proposed theoretically, and allows us to characterize the properties of quantum channels with a much smaller experimental effort than quantum process tomography. Here, the optimal detection scheme is first achieved for nonentanglement breaking channels of the depolarizing form and is based on the generation and detection of polarized entangled photons. We then demonstrate channel detection for nonseparable maps by considering the CNOT gate and employing two-photon hyperentangled states.


Volume: 111 (22)      Pages from: 220501  to: 220501

More Information: The work was supported by the EU Project QWAD (Quantum Waveguides Applications & Developments).
DOI: 10.1103/PhysRevLett.111.220501

Citations: 20
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