Benchmarking quantum state transfer on quantum devices using spatiotemporal steering

Yi-Te Huang^1*, Jhen-Dong Lin¹, Huan-Yu Ku¹, Yueh-Nan Chen¹

¹Department of Physics, National Cheng Kung University, Tainan, Taiwan

* Presenter:Yi-Te Huang, email:y.t.d.huang@phys.ncku.edu.tw

Quantum state transfer (QST) provides a method to send arbitrary quantum states from one system to another. Such a concept is crucial for transmitting quantum information into the quantum memory, quantum processor, and quantum network. The standard benchmark of QST is the average fidelity between the prepared and received states. Here, we provide a new benchmark which reveals the nonclassicality of QST based on spatiotemporal steering (STS). More specifically, we quantify the nonclassicality of QST process by measuring the spatiotemporal steerability. We then apply the spatiotemporal steerability measurement technique to benchmark quantum devices including the IBM quantum experience, QuTech quantum inspire, and IonQ under QST tasks. Moreover, we provide a quantity to estimate the signaling effect which could result from gate errors or intrinsic non-Markovian effect of the devices.

Keywords: Quantum benchmarking, Quantum steering, Quantum correlations in quantum information, Quantum network