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Bulletin of the American Physical Society

Tracking Quantum Jumps of Light with Repeated Single-Shot Parity Measurements

Luyan Sun, Andrei Petrenko, Zaki Leghtas, Brian Vlastakis, Gerhard Kirchmair, Katrina Sliwa, A. Narla, Michael Hatridge, Shyam Shankar, Jacob Blumoff, Luigi Frunzio, Mazyar Mirrahimi, Michel Devoret, Robert J. Schoelkopf

Published Mar 3, 2014• 0 citations
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The photon number parity is a binary observable playing an important role in the description of the non-classical features of light. In microwave experiments, this observable can be measured by using a single Rydberg atom evolving in a two dimension space and interacting dispersively with a field stored in one or two cavities. The procedure, based on atomic interferometry, maps the field parity (+ 1 or − 1) onto the states of the two-level atom. By performing repeated measurements of the field parity, it is possible to observe field quantum jumps, to reconstruct the complete Wigner function of an arbitrary field and to study how it evolves due to decoherence.