About QUINST

Quantum mechanics is at the heart of our technology and economy - the laser and the transistor are quantum devices - but its full potential is far from being realized. Recent technological advances in optics, nanoscience and engineering allow experimentalists to create artificial structures or put microscopic and mesoscopic systems under new manipulable conditions in which quantum phenomena play a fundamental role.

Quantum technologies exploit these effects with practical purposes. The objective of Quantum Science is to discover, study, and control quantum efects at a fundamental level. These are two sides of a virtuous circle: new technologies lead to the discovery and study of new phenomena that will lead to new technologies.

Our aim is  to control and understand quantum phenomena in a multidisciplinary intersection of  Quantum Information, Quantum optics and cold atoms, Quantum Control, Spintronics, Quantum metrology, Atom interferometry, Superconducting qubits and Circuit QED and Foundations of Quantum Mechanics.

QUINST is funded in part as a “Grupo Consolidado” from the Basque Government (IT472-10, IT986-16, IT1470-22)  and functions as a network of groups with their own funding, structure, and specific goals.  

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Seminar Seminar

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

When and where

From: 11/2010 To: 11/2016

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.