Simulating entanglement dynamics on near-term quantum computers

Huai-Chun Chang^1*, Yu-Cheng Lin¹, Hsiu-Chuan Hsu¹

¹Graduate Institute of Applied Physics, National Chengchi University, Taipei, Taiwan

* Presenter:Huai-Chun Chang, email:harui2019@proton.me

We simulate the quench dynamics of the Su–Schrieffer–Heeger model on noisy intermediate-scale quantum (NISQ) computers. In particular, the second-order Renyi entropy is probed by randomized measurement on IBMQ platforms. In order to efficiently process the large-scale quantum circuits and data from randomized measurement, we have developed a tool, Qurry, for job managements, parallel computation and the Trotter decomposition with adaptive step size. In this talk, we will present the efficiency of this tool and the simulation results. The oscillation patterns of the entanglement entropy agree well with theory after error mitigation. Lastly, the statistical scaling error of the randomized measurement protocol will be discussed.

Keywords: entanglement entropy, randomized measurement, topological insulators