Description

2009/09/25, Prof. Joachim von Zanthier (Institute for Optics, Information and Photonics; Max Planck Research Group, University of Erlangen-Nuremberg)

Place: Sala de Seminarios del Departamento de Física Teórica e Historia de la Ciencia
Time: 12h.
Title: Quantum imaging and generation of multipartite entangled states via projective measurements

Abstract
So far, in quantum imaging, sub-classical spatial resolution has been
achieved using entangled photons in combination with multi-photon
absorbers. Here we present a different method, employing photons
spontaneously emitted from uncorrelated single photon sources and
using linear optical tools only. In particular, we demonstrate that
the detection of N photons by N detectors in the far field can produce
a spatial resolution of l/N with 100 % contrast. The method relies on
multiphoton interferences displayed in the Nth order correlation
function of the radiated field. As the detection of the photons leaves
the emitters in particular entangled states this can be moreover
exploited to form a large variety of long-lived entangled states
within the same experimental setup.