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. 2019 Apr 1;377(2145):20170475. doi: 10.1098/rsta.2017.0475

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© 2019 The Authors.

Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 1. — Principle of RABBIT. Each sideband q makes up a quantum interferometer, one arm being the absorption of harmonic q − 1 followed by absorption of an IR photon, and the other the absorption of harmonic q + 1 followed by emission of an IR photon, leading to the same final energy. The intensity of the sideband oscillates as a function of the delay between the pulses, with an oscillation period of T/2, where T is the period of the fundamental, and the phase of this oscillation reveals information about the target system. (Online version in colour.)