May 20, 2020 Journal article Open Access

Karimi, Ebrahim; Leuchs, Gerd

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    <subfield code="a">&lt;p&gt;The ability to completely characterize the state of a quantum system is an essential element for the emerging quantum technologies. Here, we present a compressed-sensing inspired method to ascertain any rank-deficient qudit state, which we experimentally encode in photonic orbital angular momentum. We efficiently reconstruct these qudit states from a few scans with an intensified CCD camera. Since it requires only a few intensity measurements, our technique would provide an easy and accurate way to identify quantum sources, channels, and systems.&lt;/p&gt;</subfield>
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