Integration of topological insulator Josephson junctions in superconducting qubit circuits

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

doi:10.48550/arXiv.2007.04224

Integration of topological insulator Josephson junctions in superconducting qubit circuits

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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Abstract

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.

Original language	English
Publisher	ArXiv.org
Number of pages	14
DOIs	https://doi.org/10.48550/arXiv.2007.04224
Publication status	Published - 8 Jul 2020

Keywords

cond-mat.mes-hall
cond-mat.mtrl-sci
cond-mat.supr-con
quant-ph

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Integration of Topological Insulator Josephson Junctions in Superconducting Qubit Circuits
Schmitt, T. W., Connolly, M. R., Schleenvoigt, M., Liu, C., Kennedy, O., Chávez-Garcia, J. M., Jalil, A. R., Bennemann, B., Trellenkamp, S., Lentz, F., Neumann, E., Lindström, T., De Graaf, S. E., Berenschot, E., Tas, N., Mussler, G., Petersson, K. D., Grützmacher, D. & Schüffelgen, P., 13 Apr 2022, In: Nano letters. 22, 7, p. 2595-2602 8 p.
Research output: Contribution to journal › Article › Academic › peer-review

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Schmitt, T. W., Connolly, M. R., Schleenvoigt, M., Liu, C., Kennedy, O., Chávez-Garcia, J. M., Jalil, A. R., Bennemann, B., Trellenkamp, S., Lentz, F., Neumann, E., Lindström, T., de Graaf, S. E., Berenschot, E., Tas, N., Mussler, G., Petersson, K. D., Grützmacher, D., & Schüffelgen, P. (2020). Integration of topological insulator Josephson junctions in superconducting qubit circuits. ArXiv.org. https://doi.org/10.48550/arXiv.2007.04224

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title = "Integration of topological insulator Josephson junctions in superconducting qubit circuits",

abstract = " 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. ",

keywords = "cond-mat.mes-hall, cond-mat.mtrl-sci, cond-mat.supr-con, quant-ph",

author = "Schmitt, {Tobias W.} and Connolly, {Malcolm R.} and Michael Schleenvoigt and Chenlu Liu and Oscar Kennedy and Ch{\'a}vez-Garcia, {Jos{\'e} M.} and Jalil, {Abdur R.} and Benjamin Bennemann and Stefan Trellenkamp and Florian Lentz and Elmar Neumann and Tobias Lindstr{\"o}m and {de Graaf}, {Sebastian E.} and Erwin Berenschot and Niels Tas and Gregor Mussler and Petersson, {Karl D.} and Detlev Gr{\"u}tzmacher and Peter Sch{\"u}ffelgen",

note = "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",

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Schmitt, TW, Connolly, MR, Schleenvoigt, M, Liu, C, Kennedy, O, Chávez-Garcia, JM, Jalil, AR, Bennemann, B, Trellenkamp, S, Lentz, F, Neumann, E, Lindström, T, de Graaf, SE, Berenschot, E , Tas, N, Mussler, G, Petersson, KD, Grützmacher, D & Schüffelgen, P 2020 'Integration of topological insulator Josephson junctions in superconducting qubit circuits' ArXiv.org. https://doi.org/10.48550/arXiv.2007.04224

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T1 - Integration of topological insulator Josephson junctions in superconducting qubit circuits

AU - Schmitt, Tobias W.

AU - Connolly, Malcolm R.

AU - Schleenvoigt, Michael

AU - Liu, Chenlu

AU - Kennedy, Oscar

AU - Chávez-Garcia, José M.

AU - Jalil, Abdur R.

AU - Bennemann, Benjamin

AU - Trellenkamp, Stefan

AU - Lentz, Florian

AU - Neumann, Elmar

AU - Lindström, Tobias

AU - de Graaf, Sebastian E.

AU - Berenschot, Erwin

AU - Tas, Niels

AU - Mussler, Gregor

AU - Petersson, Karl D.

AU - Grützmacher, Detlev

AU - Schüffelgen, Peter

N1 - 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

PY - 2020/7/8

Y1 - 2020/7/8

N2 - 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.

AB - 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.

KW - cond-mat.mes-hall

KW - cond-mat.mtrl-sci

KW - cond-mat.supr-con

KW - quant-ph

U2 - 10.48550/arXiv.2007.04224

DO - 10.48550/arXiv.2007.04224

M3 - Preprint

BT - Integration of topological insulator Josephson junctions in superconducting qubit circuits

PB - ArXiv.org

ER -

Integration of topological insulator Josephson junctions in superconducting qubit circuits

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Integration of Topological Insulator Josephson Junctions in Superconducting Qubit Circuits

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