![]() ![]() Each of the modes is reflected back in three different regions on the SLM: M1, M2, and M3. A state superposition of Gaussian modes paths, | 1 〉 x ⊗ | 0 〉 y, | 2 〉 x ⊗ | 0 〉 y, and | 3 〉 x ⊗ | 0 〉 y, is considered to be our initial state. The attenuated laser beam is initially diffracted by a periodical binary phase grating in the region M4 in three horizontal paths ( x direction). The laser beam reaches a SLM in which the screen is divided into four regions (M1, M2, M3, and M4), each one with a periodical phase diffraction grating. This is necessary for filtering the polarization state and to attenuate it to the single-photon regime. A laser beam passes through a half-wave plate (HWP), a polarizer beam splitter (PBS), and a neutral density filter (NDF). Experimental setup used to prepare and to implement the operations on a three-path parallel Gaussian beam state. ![]()
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January 2023
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