We demonstrate the transition from local to global noise in a two-qubit all-optical quantum simulator subject to classical random fluctuations. Qubits are encoded in the polarization degree of freedom of two entangled photons generated by parametric down-conversion (PDC) while the environment is implemented by using their spatial degrees of freedom. The ability to manipulate with high accuracy the number of correlated pixels of a spatial-light-modulator and the PDC spectral width allows us to control the transition from a scenario where the qubits are embedded in local environments to the situation where they are subject to the same global noise. We witness the transition by monitoring the decoherence of the two-qubit state.

Experimental realization of a local-to-global noise transition in a two-qubit optical simulator / C. Benedetti, V. Vento, S. Olivares, M.G.A. Paris, S. Cialdi. - In: PHYSICAL REVIEW A. - ISSN 2469-9926. - 101:3(2020 Mar 30), pp. 032348.1-032348.7.

Experimental realization of a local-to-global noise transition in a two-qubit optical simulator

C. Benedetti
Primo
;
S. Olivares;M.G.A. Paris;S. Cialdi
Ultimo
2020

Abstract

We demonstrate the transition from local to global noise in a two-qubit all-optical quantum simulator subject to classical random fluctuations. Qubits are encoded in the polarization degree of freedom of two entangled photons generated by parametric down-conversion (PDC) while the environment is implemented by using their spatial degrees of freedom. The ability to manipulate with high accuracy the number of correlated pixels of a spatial-light-modulator and the PDC spectral width allows us to control the transition from a scenario where the qubits are embedded in local environments to the situation where they are subject to the same global noise. We witness the transition by monitoring the decoherence of the two-qubit state.
quantum simulator; entanglement; photons; classical noise; parametric down-conversion; qubits
Settore FIS/03 - Fisica della Materia
30-mar-2020
Article (author)
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/727136
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