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 group's 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.

 

 

Latest events

Dr Matthias Kleinmann ( Seminar)

When end where

15/11/2018, 11:45

Description

Semniar by Dr Matthias Kleinmann

WHEN: Thursday, 15 november 2018, at 11:45h

WHERE:  Salon de Grados, Facultad de Ciencia & Tecnologia

TITLE: Detecting and avoiding signaling in Bell-type experiments

ABSTRACT:

Bell tests were originally designed to enable the exclusion of local hidden variable models. However, their relevance goes beyond this and high violations of Bell inequalities have many applications, for example, in randomness generation, entanglement quantification, or self-testing. Then, the specific value of a Bell
correlator and the experimental reliability of this value are an important concern. We analyze typical photonic setups and find that those setups are susceptible to systemic errors. These errors can be
readily revealed by testing the nonsignaling conditions. We also present an experiment with polarization-entangled photons in which we avoid sources of systematic errors, allowing us to establish the
highest reliable value for the Clauser-Horne-Shimony-Holt correlator to date.