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Asia Pacific Physics Newsletter

"Seeking the Light in a Cavity" in Conversation with Nobel Laureate Serge Haroche

Michael R. R. Good, Wei Liang Quek

Published Aug 1, 2014• 0 citations
Publisher

Abstract

Serge Haroche, Chair in Quantum Physics at the College de France. Professor Haroche was awarded the 2012 Nobel Prize for Physics for "groundbreaking experimental methods that enable measuring and manipulation of individual quantum systems". On 22 April 2013, the first day of the Berge Fest Conference, Professor Haroche delivered a talk on "Controlling photons in cavities". He reviewed recent experiments in Cavity QED in which his group count trapped microwave photons non-destructively and used quantum feedback methods to stabilize the photon number to a preset value. Further developments of these experiments were also discussed in his talk. The editorial team of Asia Pacific Physics Newsletter interviewed Professor Haroche during the Berge Fest Conference on 24 April 2014. For more information of the Berge Fest Conference, please visit http://bergefest.quantumlah.org/

DOI
10.1142/s2251158x14000204

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Serge Haroche, Chair in Quantum Physics at the College de France. Professor Haroche was awarded the 2012 Nobel Prize for Physics for "groundbreaking experimental methods that enable measuring and manipulation of individual quantum systems". On 22 April 2013, the first day of the Berge Fest Conference, Professor Haroche delivered a talk on "Controlling photons in cavities". He reviewed recent experiments in Cavity QED in which his group count trapped microwave photons non-destructively and used quantum feedback methods to stabilize the photon number to a preset value. Further developments of these experiments were also discussed in his talk. The editorial team of Asia Pacific Physics Newsletter interviewed Professor Haroche during the Berge Fest Conference on 24 April 2014. For more information of the Berge Fest Conference, please visit http://bergefest.quantumlah.org/
We observe non destructively photons trapped in a high Q cavity, generate quantum fields in “Schrödinger cat” like states and study their decoherence. Application of these studies to the processing of quantum information will be discussed. 150-word Biography: Serge Haroche, born in 1944 in Casablanca, graduated from Ecole Normale Supérieure (ENS), receiving his doctorate from Paris VI University in 1971. After a post-doctoral visit to Stanford University (1972-73), he became full professor at Paris VI University in 1975, a position he held until 2001, when he was appointed Professor at Collège de France. Since September 2012, he is the President (Administrateur) of this institution. Haroche’s research has mostly taken place in the laboratory Kastler Brossel at ENS. His main research activities have been in quantum optics and quantum information science. He has made important contributions to Cavity Quantum Electrodynamics (Cavity QED), the domain of quantum optics which studies the behaviour of atoms interacting strongly with the field confined in a high-Q cavity. An atom-photon system isolated from the outside world by metallic walls realizes a very simple experimental model which Serge Haroche and his team have used to test fundamental aspects of quantum physics such as state superposition, entanglement, complementarity and decoherence. Serge Haroche has received many prizes and awards, culminating in the 2012 Nobel Prize in physics, shared with David Wineland. Article not available.
18 What are these methods, why are they jointly recognized? The key endeavour in the last century of quantum physics has been the exploration of the coupling between matter and electromagnetic radiation. For a long time, the available experimental techniques were limited to a large number of atoms and a very large number of photons. It was only in thought experiments that one envisioned the manipulation of well-controlled individual quantum systems, dreamed of experimenting with a single atom or a single photon. For instance, Einstein and Bohr once imagined weighing a photon trapped forever in a box, covered by perfect mirrors. These gedankenexperiments and their “ridiculous consequences”, as Schrodinger once stated, played a considerable role in the genesis of quantum physics interpretation. The technical progress made these experiments possible. One can now realize some of the founding fathers' thought experiments. D. Wineland's ion traps and S. Haroche's Cavity Quantum Electrodynamics (CQED) have pioneered this domain, which is now thriving worldwide. The 2012 Nobel prize in physics has been awarded jointly to Serge Haroche (College de France and Ecole Normale Superieure) and David Wineland (National Institute for Standards and Technology, USA) “for ground-breaking experimental methods that enable measuring and manipulation of individual quantum systems”. l Michel Brune1, Jean-Michel Raimond1, Claude Cohen-Tannoudji 1,2 DOI: 10.1051/epn/2012601 l 1 Laboratoire Kastler Brossel, ENS, CNRS, UMPC Paris 6, 24 rue Lhomond, 75005 Paris, France l 2 College de France, 11 place Marcelin Berthelot, 75005 Paris, France Nobel 2012: Trapped ions and photons
On October 9, 2012, the Royal Swedish Academy of Science announced the winners of the Nobel Prize in Physics: Serge Haroche and David J. Wineland. They were awarded this prestigious prize for their innovative techniques that achieved the first nondestructive observations of quantum events. Though Haroche and Wineland worked individually to accomplish this spectacular feat, their novel methods have similarities that ultimately led to complementary results. With lessons learned from these experiments, time is measured more precisely and the future for quantum computing looks brighter.