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Measurement-Induced Strong Kerr Nonlinearity for Weak Quantum States of Light

  Articoli su Riviste JCR/ISI  (anno 2017)

Autori:  Costanzo L. S., Coelho A. S., Biagi N., Fiurášek J., Bellini M., Zavatta A

Affiliazione Autori:  Istituto Nazionale di Ottica (INO-CNR), Largo E. Fermi 6, 50125 Florence, Italy: LENS and Department of Physics, University of Firenze, 50019 Sesto Fiorentino, Florence, Italy; Departamento de Engenharia Mecânica, Universidade Federal do Piauí, 64049-550 Teresina, Piauí, Brazil; Department of Optics, Palacký University, 17. listopadu 1192/12, CZ-771 46 Olomouc, Czech Republic

Riassunto:  Strong nonlinearity at the single photon level represents a crucial enabling tool for optical quantum technologies. Here we report on experimental implementation of a strong Kerr nonlinearity by measurement-induced quantum operations on weak quantum states of light. Our scheme coherently combines two sequences of single photon addition and subtraction to induce a nonlinear phase shift at the single photon level. We probe the induced nonlinearity with weak coherent states and characterize the output non-Gaussian states with quantum state tomography. The strong nonlinearity is clearly witnessed as a change of sign of specific off-diagonal density matrix elements in the Fock basis.

Rivista/Giornale:  PHYSICAL REVIEW LETTERS
Volume n.:  119 (1)      Pagine da: 013601-1  a: 013601-6
DOI: 10.1103/PhysRevLett.119.013601

*Impact Factor della Rivista: (2017) 8.839
data tratti da "WEB OF SCIENCE" (marchio registrato di Thomson Reuters) ed aggiornati a:  19/05/2019

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