Freiburg 2024 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 33: Open Quantum Systems
Q 33.7: Talk
Wednesday, March 13, 2024, 16:00–16:15, HS 1199
Characterizing the time dependence of quantum gates — Alessio Belenchia1, Daniel Braun1, Giovanni Gramegna2, and •Stanislaw Soltan1 — 1Eberhard Karls Universität Tübingen, Tübingen, Deutschland — 2Università degli Studi di Bari Aldo Moro, Bari, Italien
Current state-of-the-art quantum computers exhibit some non-markovian memory effects that make the actual quantum gates deviate from the ideal case. Characterization of such errors is an ongoing challenge. Successfully addressing this challenge could enable the correction of errors or, alternatively, harness these effects to enhance the control of qubits' states and for dissipative-based computation. We analyze the possible generalization of long sequence gate set tomography that takes into account the possible time dependence of quantum gates. A form of time dependence must be assumed and we derived it from the post-markovian master equation. The time dependence of the gates is taken to be explicit in the case of the simplest models of the memory effects. For more complex ones, it is reformulated as the time-independent interaction between the system of interest and auxiliary virtual qubits.
Keywords: Quantum tomography; Non-markovian dynamics