Experimental realization of quantum zeno dynamics

F. Schäfer (), I. Herrera, S. Cherukattil, C. Lovecchio, F.S. Cataliotti, F. Caruso and A. Smerzi
Additional contact information
F. Schäfer: LENS—Università di Firenze
I. Herrera: LENS—Università di Firenze
S. Cherukattil: LENS—Università di Firenze
C. Lovecchio: LENS—Università di Firenze
F.S. Cataliotti: LENS—Università di Firenze
F. Caruso: LENS—Università di Firenze
A. Smerzi: LENS—Università di Firenze

Nature Communications, 2014, vol. 5, issue 1, 1-6

Abstract: Abstract It is generally impossible to probe a quantum system without disturbing it. However, it is possible to exploit the back action of quantum measurements and strong couplings to tailor and protect the coherent evolution of a quantum system. This is a profound and counterintuitive phenomenon known as quantum Zeno dynamics. Here we demonstrate quantum Zeno dynamics with a rubidium Bose–Einstein condensate in a five-level Hilbert space. We harness measurements and strong couplings to dynamically disconnect different groups of quantum states and constrain the atoms to coherently evolve inside a two-level subregion. In parallel to the foundational importance due to the realization of a dynamical superselection rule and the theory of quantum measurements, this is an important step forward in protecting and controlling quantum dynamics and, broadly speaking, quantum information processing.

Date: 2014
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DOI: 10.1038/ncomms4194

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