Freiburg 2024 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 33: Poster VI

A 33.27: Poster

Donnerstag, 14. März 2024, 17:00–19:00, Tent A

Multi-Pass Process Tomography: precision and accuracy enhancement — •Stancho Stanchev — Department of Physics, St Kliment Ohridski University of Sofia, 5 James Bourchier blvd, 1164 Sofia, Bulgaria

In this work, we introduce an alternative method to enhance the precision and accuracy of Quantum Process Tomography (QPT) by mitigating the errors caused by state preparation and measurement (SPAM), readout and shot noise. Instead of conducting QPT solely on a single gate, we propose performing QPT on a pulse train (multi-pass) consisting of multiple identical instances of the gate. By obtaining the Pauli transfer matrix of the multi-pass process, we outline a post-processing procedure for a more precise and accurate characterization of the single process. We demonstrate the effectiveness of this approach through simulation on the IBM Quantum - ibmq qasm simulator and experimental implementation on the processor ibmq manila, Falcon r5.11L.

Keywords: Quantum Process Tomography; Precision; Quantum channels; Process Fidelity; Diamond norm