Integration of Topological Insulator Josephson Junctions in Superconducting Qubit Circuits
| Autor: | Tobias W. Schmitt, Malcolm R. Connolly, Michael Schleenvoigt, Chenlu Liu, Oscar Kennedy, José M. Chávez-Garcia, Abdur R. Jalil, Benjamin Bennemann, Stefan Trellenkamp, Florian Lentz, Elmar Neumann, Tobias Lindström, Sebastian E. de Graaf, Erwin Berenschot, Niels Tas, Gregor Mussler, Karl D. Petersson, Detlev Grützmacher, Peter Schüffelgen |
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| Přispěvatelé: | MESA+ Institute, Mesoscale Chemical Systems, Engineering & Physical Science Research Council (EPSRC) |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Condensed Matter - Materials Science
Quantum Physics Josephson junctions superconducting qubits Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Superconductivity Mechanical Engineering Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences Bioengineering General Chemistry Condensed Matter Physics selective area growth 22/4 OA procedure Superconductivity (cond-mat.supr-con) topological insulators Computer Science::Emerging Technologies Condensed Matter::Superconductivity Mesoscale and Nanoscale Physics (cond-mat.mes-hall) ddc:660 General Materials Science stencil lithography Nanoscience & Nanotechnology Quantum Physics (quant-ph) |
| Zdroj: | Nano letters, 22(7), 2595-2602. American Chemical Society Nano letters 22(7), 2595-2602 (2022). doi:10.1021/acs.nanolett.1c04055 |
| ISSN: | 1530-6984 |
| DOI: | 10.1021/acs.nanolett.1c04055 |
| Popis: | The integration of semiconductor Josephson junctions (JJs) in superconducting quantum circuits provides a versatile platform for hybrid qubits and offers a powerful way to probe exotic quasiparticle excitations. Recent proposals for using circuit quantum electrodynamics (cQED) to detect topological superconductivity motivate the integration of novel topological materials in such circuits. Here, we report on the realization of superconducting transmon qubits implemented with $(Bi_{0.06}Sb_{0.94})_{2}Te_{3}$ topological insulator (TI) JJs using ultra-high vacuum fabrication techniques. Microwave losses on our substrates with monolithically integrated hardmask, used for selective area growth of TI nanostructures, imply microsecond limits to relaxation times and thus their compatibility with strong-coupling cQED. We use the cavity-qubit interaction to show that the Josephson energy of TI-based transmons scales with their JJ dimensions and demonstrate qubit control as well as temporal quantum coherence. Our results pave the way for advanced investigations of topological materials in both novel Josephson and topological qubits. Comment: A second experimental run allowed for time-domain measurements of a TI-based transmon qubit. In the updated manuscript additional data on qubit control and coherence are included. Taking account of these new results, the focus and the title of the manuscript have been reworked, 14 pages, 10 figures |
| Databáze: | OpenAIRE |
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