Regensburg 2025 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
TT: Fachverband Tiefe Temperaturen
TT 11: Superconductivity: Poster
TT 11.33: Poster
Monday, March 17, 2025, 15:00–18:00, P4
Chiral High-Fidelity State Transfer with Thouless Pumping in Superconducting Circuits — •Lukas Vetter1,2, Federico Roy1,2, Jacquelin Luneau1,2, João H Romeiro1,2, Max Werninghaus1,2, Christian MF Schneider1,2, Peter Rabl1,2, and Stefan Filipp1,2 — 1Technical University of Munich, TUM School of Natural Scienes, Department of Physics — 2Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften
Efficient and robust techniques for state transfer and entanglement generation are vital for the progress of quantum technologies. Thouless pumping enables the topologically protected chiral transfer of excitations in quantum systems, however, dispersion during the protocol leads to losses in transfer fidelity. Here, we introduce a protocol for high-fidelity state transfer based on Thouless Pumping with Bloch Oscillations to suppress dispersion. Our protocol enables the transfer of single and multi-excitation Fock states and Bell states with high fidelity while being robust against perturbations of the Hamiltonian. We describe the effect of Bloch Oscillations using semi-classical equations of motion and show that changing the pumping cycle enables the generation of distant Bell pairs. We experimentally implement our results on a superconducting qubit device by realizing the pumping on a tunable coupler architecture. Our work paves the way for using Thouless pumping in quantum information processing, with applications in topologically robust entanglement generation and multi-qubit gates.
We acknowledge financial support from GeQCoS, MUNIQC-SC, MCQST, OpenSuperQPlus100, and the Munich Quantum Valley.
Keywords: Chiral State Transfer; Thouless Pumping; Superconducting Qubits