Many-Body Dephasing in a Trapped-Ion Quantum Simulator

Autor:	Kaplan, Harvey B., Guo, Lingzhen, Tan, Wen Lin, De, Arinjoy, Marquardt, Florian, Pagano, Guido, Monroe, Christopher
Rok vydání:	2020
Předmět:	Condensed Matter - Statistical Mechanics Condensed Matter - Quantum Gases Condensed Matter - Strongly Correlated Electrons Physics - Atomic Physics Quantum Physics
Zdroj:	Phys. Rev. Lett. 125, 120605 (2020)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.125.120605
Popis:	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 work, we analyse 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 even for the long-time non-integrable 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. Comment: 5 pages, 4 figures, to be published in Physical Review Letters
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2001.02477 Zobrazit plný text záznamu View this record from Arxiv