Characterizing d-dimensional quantum channels by means of quantum process tomography
In this Letter, we propose a simple optical architecture based on phase-only programmable spatial light modulators, in order to characterize general processes on photonic spatial quantum systems in a d > 2 Hilbert space. We demonstrate the full reconstruction of typical noises affecting quantum c...
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| Autores principales: | , , , |
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| Formato: | JOUR |
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_01469592_v43_n18_p4398_Varga |
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| Sumario: | In this Letter, we propose a simple optical architecture based on phase-only programmable spatial light modulators, in order to characterize general processes on photonic spatial quantum systems in a d > 2 Hilbert space. We demonstrate the full reconstruction of typical noises affecting quantum computing, such as amplitude shifts, phase shifts, and depolarizing channels in dimension d 5. We have also reconstructed simulated atmospheric turbulences affecting a free-space transmission of qudits in dimension d 4. In each case, quantum process tomography was performed in order to obtain the matrix χ that fully describes the corresponding quantum channel, E. Fidelities between the states are experimentally obtained after going through the channel, and the expected ones are above 97%. © 2018 Optical Society of America |
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