Past Events

Introduction to Quantum Technologies

on 23-11-2019

Date: Saturday 23 November 2019
Venue: Room 2, Fundação Calouste Gulbenkian, Lisbon, Portugal

This School is organized in the framework of the Gulbenkian Programme/New Talents in Quantum Technologies.
The School is primarily dedicated to undergraduate and master students, but is open to all students, researchers and professionals interested in learning about Quantum Technologies.
Only knowledge in linear algebra is required to attend the School. More Information..

Macroscopic quantum states: applications and fundamental limitations

on 22-11-2019

Wolfgang Dür, University of Innsbruck

Date & time: Friday, November 22nd, 10:00h
Location: Instituto Superior Técnico, Lisbon, Room P3.10, Mathematics Building

Abstract:
The creation of ever larger quantum states that are in a coherent superposition is an experimental challenge of fundamental and practical interest. We report on attempts to characterize such superposition states, and on fundamental limitations to prepare, maintain and detect them. This includes general results on fragility of all macroscopic quantum states under noise, and the need of tremendous measurement devices to detect them. We also consider applications of such states in the context of quantum metrology, and show that noise and imperfections limit the achievable quantum advantage. We discuss methods such as dynamical control or quantum error correction that allow one to overcome some of these limitation, and present noise-resilient methods for optimal sensing of non-local quantities using distributed sensors.

More Information..