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Trapped Ion Quantum Computing

Measurement-induced strong Kerr nonlinearity for weak quantum states of light

arXiv
Authors: Luca S. Costanzo, Antonio S. Coelho, Nicola Biagi, Jaromír Fiurášek, Marco Bellini, Alessandro Zavatta

Year

2017

Paper ID

45071

Status

Preprint

Abstract Read

~2 min

Abstract Words

99

Citations

N/A

Abstract

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 Fock basis.

Why This Paper Matters

  • This paper contributes to the Trapped-Ion Quantum Computing research area in the Quantum Articles archive.
  • It adds a 2017 reference point for readers tracking recent quantum research.
  • Strong nonlinearity at the single photon level represents a crucial enabling tool for optical quantum technologies.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1706.07018 [2] arXiv https://arxiv.org/abs/1706.07018 [3] Publisher https://arxiv.org/abs/1706.07018

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