



@article {2531,
	title = {Many-Body Dephasing in a Trapped-Ion Quantum Simulator},
	journal = {Phys. Rev. Lett.},
	volume = {125},
	year = {2020},
	month = {8/24/2020},
	abstract = {<p>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 observe and analyse 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 and observe the experimental evidence for the theoretically predicted regime of many-body dephasing. 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. We find that the measured fluctuations are exponentially suppressed with increasing system size, consistent with theoretical predictions.\&nbsp;</p>},
	doi = {https://doi.org/10.1103/PhysRevLett.125.120605},
	url = {https://arxiv.org/abs/2001.02477},
	author = {Harvey B. Kaplan and Lingzhen Guo and Wen Lin Tan and Arinjoy De and Florian Marquardt and Guido Pagano and Christopher Monroe}
}
