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Proceedings Paper

High-efficiency quantum state engineering
Author(s): Kevin T. McCusker; Radhika Rangarajan; Paul G. Kwiat
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Paper Abstract

Efficiently creating optical quantum states, both simple (e.g., pure single-photon states) and complex (e.g., polarization-entangled but spectrally unentangled photon pairs), remains an experimental challenge. We report on a novel method that allows for efficiently preparing certain classes of states: by weakly driving repeated downconversion in a cavity, we can pseudo-deterministically add photons to a state, preparing Fock states of definite photon number. We discuss expected performance and experimental limitations, including the difficulty of creating pure photons at a high rate. Additionally, we report on our progress in engineering high-rate spatio-spectrally unentangled downconversion, a key technology for optical quantum information processing, and propose a novel 4-photon experimental scheme to test the intrinsic indistinguishability of the photons from this source.

Paper Details

Date Published: 26 August 2009
PDF: 9 pages
Proc. SPIE 7465, Quantum Communications and Quantum Imaging VII, 74650F (26 August 2009); doi: 10.1117/12.826998
Show Author Affiliations
Kevin T. McCusker, Univ. of Illinois at Urbana-Champaign (United States)
Radhika Rangarajan, Univ. of Illinois at Urbana-Champaign (United States)
Paul G. Kwiat, Univ. of Illinois at Urbana-Champaign (United States)

Published in SPIE Proceedings Vol. 7465:
Quantum Communications and Quantum Imaging VII
Ronald E. Meyers; Yanhua Shih; Keith S. Deacon, Editor(s)

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