Work

Producing high fidelity single photons with optimal brightness via waveguided parametric down-conversion

Year: 2009

Type: article

Abstract: Parametric down-conversion (PDC) offers the possibility to control the fabrication of non-Gaussian states such as Fock states. However, in conventional PDC sources energy and momentum conservation introduce strict frequency and photon number correlations, which impact the fidelity of the prepared state. In our work we optimize the preparation of single-photon Fock states from the emission of waveguided PDC via spectral filtering. We study the effect of correlations via photon number resolving detection and quantum interference. Our measurements show how the reduction of mixedness due to filtering can be evaluated. Interfering the prepared photon with a coherent state we establish an experimentally measured fidelity of the produced target state of 78%.

Source: Optics Express

DOI: 10.1364/oe.17.022823

Authors: K. Laiho, K. N. Cassemiro, Ch. Silberhorn

Institution: Max Planck Institute for the Science of Light

Language: English

Topic: Quantum Information and Cryptography

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

Funders: Alexander von Humboldt-Stiftung, FP7 Information and Communication Technologies