Experimental Detection of Quantum Channels
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.
Journal/Review: PHYSICAL REVIEW LETTERS
Volume: 111 (22) Pages from: 220501 to: 220501
More Information: The work was supported by the EU Project QWAD (Quantum Waveguides Applications & Developments).KeyWords: ENTANGLEMENT; SEPARABILITYDOI: 10.1103/PhysRevLett.111.220501Citations: 20data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2023-12-03References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here