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Quantum Information and Measurement (QIM)

Demonstration of Deterministic and Passive Photon-Atom SWAP Quantum Gate

Adrien Borne, Orel Bechler, Serge Rosenblum, Gabriel Guendelman, Ori Ezrah Mor, Moran Netzer, Doron Gurovich, Tal Ohana, Ziv Aqua, Niv Drucker, Yulia Lovsky, R. Bruch, Ran Finkelstein, Ehud Shafir, Barak Dayan

Published Jan 1, 2017• 2 citations
Publisher

Abstract

Using single-photon Raman interaction, we demonstrate a deterministic and passive SWAP gate and quantum memory between the states of a single photon and a single 87Rb atom coupled to high-Q microresonator.
DOI
10.1364/qim.2017.qt2a.7

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We demonstrate a passive scheme for deterministic interactions between a single photon and a single atom. Relying on single-photon Raman interaction (SPRINT), this control-fields free scheme swaps a flying qubit, encoded in the two possible input modes of a photon, with a stationary qubit, encoded in the two ground states of the atom, and can be also harnessed to perform universal quantum gates. Using SPRINT we experimentally demonstrated all-optical switching of single photons by single photons, and deterministic extraction of a single photon from an optical pulse. Applicable to any atom-like Lambda system, SPRINT provides a versatile building block for scalable quantum networks based on completely passive nodes interconnected and activated solely by single photons.