Many-Body Dephasing in a Trapped-Ion Quantum Simulator

Kaplan HB, Guo L, Tan WL, De A, Marquardt F, Pagano G, Monroe C (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Physical Review Letters American Physical Society

Book Volume: 125

Journal Issue: 12

DOI: 10.1103/PhysRevLett.125.120605

Abstract

How a closed interacting quantum many-body system relaxes and dephases as a function of time is a fundamental question in thermodynamic and statistical physics. In this Letter, we analyze and observe the persistent temporal fluctuations after a quantum quench of a tunable long-range interacting transverse-field Ising Hamiltonian realized with a trapped-ion quantum simulator. We measure the temporal fluctuations in the average magnetization of a finite-size system of spin-1/2 particles. We experiment in a regime where the properties of the system are closely related to the integrable Hamiltonian with global spin-spin coupling, which enables analytical predictions for the long-time nonintegrable dynamics. The analytical expression for the temporal fluctuations predicts the exponential suppression of temporal fluctuations with increasing system size. Our measurement data is consistent with our theory predicting the regime of many-body dephasing.

Authors with CRIS profile

Florian Marquardt Lehrstuhl für Theoretische Physik

Involved external institutions

Max-Planck-Institut für die Physik des Lichts (MPL) / Max Planck Institute for the Science of Light DE Germany (DE) University of Maryland, College Park (UMD) US United States (USA) (US)

How to cite

APA:

Kaplan, H.B., Guo, L., Tan, W.L., De, A., Marquardt, F., Pagano, G., & Monroe, C. (2020). Many-Body Dephasing in a Trapped-Ion Quantum Simulator. Physical Review Letters, 125(12). https://doi.org/10.1103/PhysRevLett.125.120605

MLA:

Kaplan, Harvey B., et al. "Many-Body Dephasing in a Trapped-Ion Quantum Simulator." Physical Review Letters 125.12 (2020).

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