Scientific Results

Experimental linear-optics simulation of multipartite non-locality in the ground state of a quantum lsing ring

Year: 2014

Authors: Orieux A. Boutari J., Barbieri M., Paternostro M., Mataloni P.

Autors Affiliation: Dipartimento di Fisica, Sapienza Universit√† di Roma, Piazzale Aldo Moro, 5, I-00185 Roma, Italy; Clarendon Laboratory, University of Oxford, Parks Road, Oxford, OX1 3PU, United Kingdom; Centre for Theoretical Atomic, Molecular and Optical Physics, School of Mathematics and Physics, Queen\’s University, Belfast BT7 1NN, United Kingdom; Istituto Nazionale di Ottica, Consiglio Nazionale delle Ricerche (INO-CNR), Largo Enrico Fermi, 6, I-50125 Firenze, Italy

Abstract: Critical phenomena involve structural changes in the correlations of its constituents. Such changes can be reproduced and characterized in quantum simulators able to tackle medium-to-large-size systems. We demonstrate these concepts by engineering the ground state of a three-spin Ising ring by using a pair of entangled photons. The effect of a simulated magnetic field, leading to a critical modification of the correlations within the ring, is analysed by studying two-and three-spin entanglement. In particular, we connect the violation of a multipartite Bell inequality with the amount of tripartite entanglement in our ring.


Volume: 4      Pages from: 7184  to: 7184

More Information: M.B. is grateful to the Quantum Optics group at Sapienza, Universita di Roma for hospitality during the development and completion of this work, and acknowledges support by the UK EPSRC (EP/H03031X/1 and EP/K034480/1). M.P. thanks the UK EPSRC for a Career Acceleration Fellowship and a grant awarded under the \”New Directions for Research Leaders\’\’ initiative (EP/G004579/1), and the John Templeton Foundation (grant 43467). A.O. and P.M. acknowledge support from the EU project QWAD. This work was supported by the EU-Project CHISTERA-QUASAR, PRIN 2009 and FIRB-Futuro in ricerca HYTEQ.
KeyWords: quantum simulation; trapped ions; entanglement; systems; computer
DOI: 10.1038/srep07184

Citations: 7
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