Overcoming the influence of noise and imperfections is a major challenge in quantum computing. Here, we present an approach based on applying a desired unitary computation in superposition between the system of interest and some auxiliary states. We demonstrate, numerically and on the IBM Quantum Platform, that parallel applications of the same operation lead to significant noise mitigation when arbitrary noise processes are considered. We first design probabilistic implementations of our scheme that are plug and play, independent of the noise characteristic and require no postprocessing. We then enhance the success probability (up to deterministic) using adaptive corrections. We provide an analysis of our protocol performance and demonstrate that unit fidelity can be achieved asymptotically. Our approaches are suitable to both standard gate-based and measurement-based computational models.
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| http://dx.doi.org/10.1103/PhysRevLett.131.230601 | DOI Listing |
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- Higher-order structured light beams, like optical vortex (OV) and vector beams, have valuable applications in fields such as optical trapping and quantum optics, and can be represented on higher-order Poincaré spheres (HOPS).
- The study introduces a method for generating spatiotemporal structured light beams, which change dynamically instead of remaining static on HOPS.
- By superposing OV beams with varying frequencies, the researchers simulate light beams that can flexibly vary along different paths on the first-order Poincaré sphere, potentially allowing faster and more versatile manipulation of light in various applications.
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