High-efficiency quantum state engineering

Kevin T. McCusker; Radhika Rangarajan; Paul G. Kwiat

doi:10.1117/12.826998

26 August 2009 High-efficiency quantum state engineering

Kevin T. McCusker, Radhika Rangarajan, Paul G. Kwiat

Proceedings Volume 7465, Quantum Communications and Quantum Imaging VII; 74650F (2009) https://doi.org/10.1117/12.826998
Event: SPIE Optical Engineering + Applications, 2009, San Diego, California, United States

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.

Citation Download Citation

Kevin T. McCusker, Radhika Rangarajan, and Paul G. Kwiat "High-efficiency quantum state engineering", Proc. SPIE 7465, Quantum Communications and Quantum Imaging VII, 74650F (26 August 2009); https://doi.org/10.1117/12.826998

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