31 October 2013
Science Lecture 

Science Lecture by Professor Serge Haroche

2012 Nobel Laureate in Physics

17:30 - 31 October - Life Science Building

University of the Western Cape

Science: our next step towards freedom!

Power and St rangeness of the Quantum World

Serge Haroche, Collège de France and Ecole Normale Supérieure, Paris Quantum theory has allowed physicists to understand in depth the microscopic world, leading to applications (computers, lasers, magnetic resonance imaging, atomic clocks...) which have revolutionized our lives. And yet, in spite of its successes, quantum physics is deeply counterintuitive. Its strangeness resides in the principle of state superposition, which implies that a particle can behave as a wave , and in the related concepts of quantumentanglement and non-locality. At the macroscopic level, these odd phenomena are veiled by the process of decoherence which imparts to the world its classical appearance. Recent technological advances have allowed us to manipulate isolated quantum systems such as atoms, molecules, photons or superconducting microchips. These experiments lead to the direct observation of the most counterintuitive aspects of the quantum behaviour. Beyond their fundamental interest, they open fascinating perspectives for applications, letting us envision novel technologies in which the quantum strangeness will be harnessed to achieve tasks impossible to perform with devices relying on classical laws. We dream about quantum cryptography, teleportation, quantum computing… Which of these applications will become practical remains an open question. What is sure is that the ongoing exploration of the strange laws of the microscopic world will yield more surprises and reasons to wonder about Nature. Science: our next step towards f reedom!