Towards probing for hypercomplex quantum mechanics in a waveguide interferometer

Abstract

We experimentally investigate the suitability of a multi-path waveguide interferometer with mechanical shutters for performing a test for hypercomplex quantum mechanics. Probing the interferometer with coherent light we systematically analyse the influence of experimental imperfections that could lead to a false-positive test result. In particular, we analyse the effects of detector nonlinearity, input-power and phase fluctuations on different timescales, closed-state transmissivity of shutters and crosstalk between different interferometer paths. In our experiment, a seemingly small shutter transmissivity in the order of about $2\times 10^{-4}$ is the main source of systematic error, which suggests that this is a key imperfection to monitor and mitigate in future experiments.

arXiv comment23 pages, 7 figures

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Cited by in corpus (4)

• Multi-Path and Multi-Particle Tests of Complex vs. Hyper-Complex Quantum Theory
• Testing the postulates of quantum mechanics with coherent states of light and homodyne detection
• Nonlinear response of telecom-wavelength superconducting single-photon detectors
• Emergence of biased errors in imperfect photonic circuits