Many-Body Dephasing in a Trapped-Ion Quantum Simulator
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 transv...
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| creator | Kaplan, Harvey B Guo, Lingzhen Wen Lin Tan De, Arinjoy Marquardt, Florian Pagano, Guido Monroe, Christopher |
| description | 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. |
| doi_str_mv | 10.48550/arxiv.2001.02477 |
| format | Article |
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| subjects | Ising model Particle spin Physics - Atomic Physics Physics - Quantum Gases Physics - Quantum Physics Physics - Statistical Mechanics Physics - Strongly Correlated Electrons Predictions Spin-spin coupling Variation |
| title | Many-Body Dephasing in a Trapped-Ion Quantum Simulator |
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