Work

High purity bright single photon source

Year: 2007

Type: article

Abstract: Using cavity-enhanced non-degenerate parametric down-conversion, we have built a frequency tunable source of heralded single photons with a narrow bandwidth of 8 MHz, making it compatible with atomic quantum memories. The photon state is 70% pure single photon as characterized by a tomographic measurement and reconstruction of the quantum state, revealing a clearly negative Wigner function. Furthermore, it has a spectral brightness of ~1,500 photons/s per MHz bandwidth, making it one of the brightest single photon sources available. We also investigate the correlation function of the down-converted fields using a combination of two very distinct detection methods; photon counting and homodyne measurement.

Source: Optics Express

DOI: 10.1364/oe.15.007940

Authors: J. S. Neergaard-Nielsen, B. M. Nielsen, H. Takahashi, A. I. Vistnes, E. S. Polzik

Institutions: University of Copenhagen, Danish National Research Foundation, The University of Tokyo, National Institute of Information and Communications Technology, University of Oslo

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

OpenAlex ID: W1968561531

FWCI: 18.47

Cites: 33

Cited by: 162

Related to: 10