Examinando por Autor "Kolthammer, W Steven"

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Approximating vibronic spectroscopy with imperfect quantum optics
(IOP Publishing, 2018-11-23) Valido, Antonio A; Clements, William R; Renema, Jelmer J; Eckstein, Andreas; Lita, Adriana; Gerrits, Thomas; Woo Nam, Soo; Kolthammer, W Steven; Huh, Joonshuk; Walmsley, Iam A
We study the impact of experimental imperfections on a recently proposed protocol for performing quantum simulations of vibronic spectroscopy. Specifically, we propose a method for quantifying the impact of these imperfections, optimizing an experiment to account for them, and benchmarking the results against a classical simulation method. We illustrate our findings using a proof of principle experimental simulation of part of the vibronic spectrum of tropolone. Our findings will inform the design of future experiments aiming to simulate the spectra of large molecules beyond the reach of current classical computers.
Tensor network states in time-bin quantum optics
(American Physical Society, 2018-06-05) Valido, Antonio A; Renema, Jelmer J; Walmsley, Ian A; Kolthammer, W Steven; Lubasch, Michael; Jaksch, Dieter; García-Patrón, Raúl
The current shift in the quantum optics community towards experiments with many modes and photons necessitates new classical simulation techniques that efficiently encode many-body quantum correlations and go beyond the usual phase-space formulation. To address this pressing demand we formulate linear quantum optics in the language of tensor network states. We extensively analyze the quantum and classical correlations of time-bin interference in a single fiber loop. We then generalize our results to more complex time-bin quantum setups and identify different classes of architectures for high-complexity and low-overhead boson sampling experiments.