Quantum read-out for cold atomic quantum simulators

Gluza M, Schweigler T, Rauer B, Krumnow C, Schmiedmayer J, Eisert J (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Communications Physics Springer Nature

Book Volume: 3

Article Number: 12

Journal Issue: 1

DOI: 10.1038/s42005-019-0273-y

Abstract

Quantum simulators allow to explore static and dynamical properties of otherwise intractable quantum many-body systems. In many instances, however, the read-out limits such quantum simulations. In this work, we introduce an innovative experimental read-out exploiting coherent non-interacting dynamics. Specifically, we present a tomographic recovery method allowing to indirectly measure the second moments of the relative density fluctuations between two one-dimensional superfluids, which until now eluded direct measurements. Applying methods from signal processing, we show that we can reconstruct the relative density fluctuations from non-equilibrium data of the relative phase fluctuations. We employ the method to investigate equilibrium states, the dynamics of phonon occupation numbers and even to predict recurrences. The method opens a new window for quantum simulations with one-dimensional superfluids, enabling a deeper analysis of their equilibration and thermalization dynamics.

Involved external institutions

Freie Universität Berlin DE Germany (DE) Technische Universität Wien / Vienna University of Technology AT Austria (AT)

How to cite

APA:

Gluza, M., Schweigler, T., Rauer, B., Krumnow, C., Schmiedmayer, J., & Eisert, J. (2020). Quantum read-out for cold atomic quantum simulators. Communications Physics, 3(1). https://doi.org/10.1038/s42005-019-0273-y

MLA:

Gluza, M., et al. "Quantum read-out for cold atomic quantum simulators." Communications Physics 3.1 (2020).

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