Color Erasure Detectors Enable Chromatic Interferometry

Authors :: Jordan Cotler
Luo-Yuan Qu
Ming-Yang Zheng
Qiang Zhang
Fei Ma
Xiuping Xie
Jian-Yu Guan
Yu-Ao Chen
Jian-Wei Pan
Frank Wilczek
Source :: Physical Review Letters. 123
Publication Year :: 2019
Publisher :: American Physical Society (APS), 2019.
Abstract: By engineering and manipulating quantum entanglement between incoming photons and experimental apparatus, we construct single-photon detectors which cannot distinguish between photons of very different wavelengths. These color erasure detectors enable a new kind of intensity interferometry, with potential applications in microscopy and astronomy. We demonstrate chromatic interferometry experimentally, observing robust interference using both coherent and incoherent photon sources.<br />Comment: 21 pages, 7 figures