Fig. 1 Experimental setup.

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Presentation transcript:

Fig. 1 Experimental setup. Experimental setup. Heralded signal photons (SPs) are separated into two paths by a beam displacer (BD 30). A half-wave plate HWP1 is used to change the relative phase between these two paths, while HWP2 is used to make the polarization of both paths the same. A birefringent crystal (PC) is inserted into one of the paths to compensate the difference in the optical length. The photon is prepared in the diagonal polarization state by HWP3 and then goes through a thin calcite crystal to perform weak measurement. The optic axis of the calcite crystal is in the xz plane oriented at 42° to the z axis. A quarter wave plate (QWP) and a beam displacer (BD 40) are used to detect the polarization of the photon. A combination of three lenses, L1 (plano-convex), L2 (aspherical and moveable), and L3 (plano-convex cylindrical), is used to image different planes on the intensified charge-coupled device (ICCD) camera. Ya Xiao et al. Sci Adv 2019;5:eaav9547 Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).