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Angewandte Chemie International Edition

Superposition, Entanglement, and Raising Schrödinger’s Cat (Nobel Lecture)

David J. Wineland

Published Aug 12, 2013• 29 citations
Publisher

Abstract

Experimental control of quantum systems has been pursued widely since the invention of quantum mechanics. Today, we can in fact experiment with individual quantum systems, deterministically preparing superpositions and entanglements. In his Nobel lecture, D. J. Wineland gives an overview of this research which has led to the Nobel prize in physics in 2012.

DOI
10.1002/anie.201303404

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International Journal of Modern Physics AVol. 29, No. 10, 1430027 (2014) Reviews: 2012 Nobel Lectures in PhysicsNo AccessSuperposition, entanglement, and raising Schrödinger's catDavid J. WinelandDavid J. WinelandNational Institute of Standards and Technology, Boulder, CO, USAUniversity of Colorado, Boulder, CO, USA Search for more papers by this author https://doi.org/10.1142/S0217751X14300270Cited by:3 PreviousNext AboutSectionsPDF/EPUB ToolsAdd to favoritesDownload CitationsTrack CitationsRecommend to Library ShareShare onFacebookTwitterLinked InRedditEmail Published on 16 April 2014 with permission from the Nobel Foundation.Nobel Lecture, December 8, 2012 You currently do not have access to the full text article. Recommend the journal to your library today! FiguresReferencesRelatedDetailsCited By 3Reception and Impact of the EPR PaperClaus Kiefer22 July 2021Further DevelopmentsClaus Kiefer22 July 2021Detection of electron-phonon coupling in two-dimensional materials by light scatteringJia-Min Lai, Ya-Ru Xie and Jun Zhang27 July 2020 | Nano Research, Vol. 14, No. 6 Recommended Vol. 29, No. 10 Metrics History PDF download

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Nobel Lecture: Controlling photons in a box and exploring the quantum to classical boundary

S. Haroche

Microwave photons trapped in a superconducting cavity constitute an ideal system to realize some of the thought experiments imagined by the founding fathers of quantum physics. The interaction of these trapped photons with Rydberg atoms crossing the cavity illustrates fundamental aspects of measurement theory. The experiments performed with this ``photon box'' at Ecole Normale Sup\'erieure (ENS) belong to the domain of quantum optics called ``cavity quantum electrodynamics.'' We have realized the nondestructive counting of photons, the recording of field quantum jumps, the preparation and reconstruction of ``Schr\"odinger cat'' states of radiation and the study of their decoherence, which provides a striking illustration of the transition from the quantum to the classical world. These experiments have also led to the demonstration of basic steps in quantum information processing, including the deterministic entanglement of atoms and the realization of quantum gates using atoms and photons as quantum bits. This lecture starts by an introduction stressing the connection between the ENS photon box and the ion-trap experiments of David Wineland, whose accompanying lecture recalls his own contribution to the field of single particle control. I give then a personal account of the early days of cavity quantum electrodynamics before describing the main experiments performed at ENS during the last 20 years and concluding by a discussion comparing our work to other researches dealing with the control of single quantum particles.

Reviews of Modern Physics•Jul 12, 2013•632 citations
Experimental control of quantum systems has been pursued widely since the invention of quantum mechanics. Today, we can in fact experiment with individual quantum systems, deterministically preparing superpositions and entanglements. In his Nobel lecture, D. J. Wineland gives an overview of this research which has led to the Nobel prize in physics in 2012.
International Journal of Modern Physics AVol. 29, No. 10, 1430027 (2014) Reviews: 2012 Nobel Lectures in PhysicsNo AccessSuperposition, entanglement, and raising Schrödinger's catDavid J. WinelandDavid J. WinelandNational Institute of Standards and Technology, Boulder, CO, USAUniversity of Colorado, Boulder, CO, USA Search for more papers by this author https://doi.org/10.1142/S0217751X14300270Cited by:3 PreviousNext AboutSectionsPDF/EPUB ToolsAdd to favoritesDownload CitationsTrack CitationsRecommend to Library ShareShare onFacebookTwitterLinked InRedditEmail Published on 16 April 2014 with permission from the Nobel Foundation.Nobel Lecture, December 8, 2012 You currently do not have access to the full text article. Recommend the journal to your library today! FiguresReferencesRelatedDetailsCited By 3Reception and Impact of the EPR PaperClaus Kiefer22 July 2021Further DevelopmentsClaus Kiefer22 July 2021Detection of electron-phonon coupling in two-dimensional materials by light scatteringJia-Min Lai, Ya-Ru Xie and Jun Zhang27 July 2020 | Nano Research, Vol. 14, No. 6 Recommended Vol. 29, No. 10 Metrics History PDF download
Microwave photons trapped in a superconducting cavity constitute an ideal system to realize some of the thought experiments imagined by the founding fathers of quantum physics. The interaction of these trapped photons with Rydberg atoms crossing the cavity illustrates fundamental aspects of measurement theory. The experiments performed with this ``photon box'' at Ecole Normale Sup\'erieure (ENS) belong to the domain of quantum optics called ``cavity quantum electrodynamics.'' We have realized the nondestructive counting of photons, the recording of field quantum jumps, the preparation and reconstruction of ``Schr\"odinger cat'' states of radiation and the study of their decoherence, which provides a striking illustration of the transition from the quantum to the classical world. These experiments have also led to the demonstration of basic steps in quantum information processing, including the deterministic entanglement of atoms and the realization of quantum gates using atoms and photons as quantum bits. This lecture starts by an introduction stressing the connection between the ENS photon box and the ion-trap experiments of David Wineland, whose accompanying lecture recalls his own contribution to the field of single particle control. I give then a personal account of the early days of cavity quantum electrodynamics before describing the main experiments performed at ENS during the last 20 years and concluding by a discussion comparing our work to other researches dealing with the control of single quantum particles.