We address the experimental implementation of a quantum simulator based on an optical setup. Our device can simulate the dynamical evolution of a qubit undergoing a dephasing process. In particular, we focus on the dynamics aris- ing from the interaction with a classical stochastic field. We encode the state of the qubit in the polarization of a single photon, while the realizations of the stochastic evolution affect its spectral components by a programmable spatial-light-modulator. This setup can simulate in one shot the ensemble-averaged dynamics of the dephas- ing qubit. We experimentally reconstruct the system density matrix and we show how it is possible to move from a Markovian to a non-Markovian quantum map by changing the spectral parameter of the simulated noise.

Quantum Simulation of Non-Markovian Qubit Dynamics by an All-Optical Setup / C. Benedetti, S. Cialdi, M.A.C. Rossi, B. Vacchini, D. Tamascelli, S. Olivares, M.G.A. Paris - In: Toward a Science Campus in Milan : A Snapshot of Current Research at the Physics Department Aldo Pontremoli / [a cura di] P.Francesco Bortignon, G. Lodato, E. Meroni, M.G.A. Paris, L. Perini, A. Vicini. - [s.l] : Springer, 2018 Dec. - ISBN 9783030016289. - pp. 37-46 (( convegno CDIP tenutosi a Milano nel 2017 [10.1007/978-3-030-01629-6_4].

Quantum Simulation of Non-Markovian Qubit Dynamics by an All-Optical Setup

C. Benedetti
;
S. Cialdi;B. Vacchini;D. Tamascelli;S. Olivares;M.G.A. Paris
2018

Abstract

We address the experimental implementation of a quantum simulator based on an optical setup. Our device can simulate the dynamical evolution of a qubit undergoing a dephasing process. In particular, we focus on the dynamics aris- ing from the interaction with a classical stochastic field. We encode the state of the qubit in the polarization of a single photon, while the realizations of the stochastic evolution affect its spectral components by a programmable spatial-light-modulator. This setup can simulate in one shot the ensemble-averaged dynamics of the dephas- ing qubit. We experimentally reconstruct the system density matrix and we show how it is possible to move from a Markovian to a non-Markovian quantum map by changing the spectral parameter of the simulated noise.
Quantum simulator; Optical setup; Dephasing qubits; Classical stochastic processes
Settore FIS/03 - Fisica della Materia
dic-2018
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/613337
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