A high-dimensional test of local realism with optically synthesized spin qudits

Olivier Pfister

doi:10.1117/12.3030554

4 October 2024 A high-dimensional test of local realism with optically synthesized spin qudits

Olivier Pfister

Proceedings Volume PC13119, Spintronics XVII; PC1311918 (2024) https://doi.org/10.1117/12.3030554
Event: Nanoscience + Engineering, 2024, San Diego, California, United States

Abstract

In spin-encoded quantum information, a spin of magnitude s gives access to a (2s+1)-dimensional qudit. (In particular, s=1/2 yields a qubit). Quantum optics writ large as the quantum processing of boson fields has provided convenient experimental ways to generate effective, or "synthetic," spins by way of mathematical equivalences such as the Holstein-Primakoff transformation, which maps 1 boson field to 1 large, "linearized" spin, and the Schwinger transformation, which maps 2 boson fields to 1 spin. The latter is of particular interest as it also maps bijectively with two-mode Fock states, which have non-Gaussian Wigner functions and therefore enable, in principle, universal, fast-tolerant photonic quantum computing. The recent coming of age of high-efficiency photon-number-resolved detectors provided the missing experimental resource to work with Schwinger spins. In this talk, I will describe progress towards experimentally violating Mermin's inequality (the s>1/2 version of the Bell inequality) using superconducting transition edge sensors in our quantum optics laboratory.

Conference Presentation

Citation Download Citation

Olivier Pfister "A high-dimensional test of local realism with optically synthesized spin qudits", Proc. SPIE PC13119, Spintronics XVII, PC1311918 (4 October 2024); https://doi.org/10.1117/12.3030554

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