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6 results on '"Vermeulen, Kiefer"'

1. Thermalization of a flexible microwave stripline measured by a superconducting qubit

Author

Paluch, Patrick, Spiecker, Martin, Gosling, Nicolas, Adam, Viktor, Kammhuber, Jakob, Vermeulen, Kiefer, Bouman, Daniël, Wernsdorfer, Wolfgang, and Pop, Ioan M.

Subjects
Quantum Physics
Abstract

With the demand for scalable cryogenic microwave circuitry continuously rising, recently developed flexible microwave striplines offer the tantalyzing perspective of increasing the cabling density by an order of magnitude without thermally overloading the cryostat. We use a superconducting quantum circuit to test the thermalization of input flex cables with integrated $60\,$dB of attenuation distributed at various temperature stages. From the measured decoherence rate of a superconducting fluxonium qubit, we estimate a residual population of the readout resonator below $3.5\cdot10^{-3}$ photons and we measure a $0.28\,$ms thermalization time for the flexible stripline attenuators. Furthermore, we confirm that the qubit reaches an effective temperature of $26.4\,$mK, close to the base temperature of the cryostat, practically the same as when using a conventional semi-rigid coaxial cable setup.

Published
2024

2. In-plane selective area InSb-Al nanowire quantum networks

Author

Veld, Roy L. M. Op het, Xu, Di, Schaller, Vanessa, Verheijen, Marcel A., Peters, Stan M. E., Jung, Jason, Tong, Chuyao, Wang, Qingzhen, de Moor, Michiel W. A., Hesselmann, Bart, Vermeulen, Kiefer, Bommer, Jouri D. S., Lee, Joon Sue, Sarikov, Andrey, Pendharkar, Mihir, Marzegalli, Anna, Koelling, Sebastian, Kouwenhoven, Leo P., Miglio, Leo, Palmstrøm, Chris J., Zhang, Hao, and Bakkers, Erik P. A. M.

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics
Abstract

Strong spin-orbit semiconductor nanowires coupled to a superconductor are predicted to host Majorana zero modes. Exchange (braiding) operations of Majorana modes form the logical gates of a topological quantum computer and require a network of nanowires. Here, we develop an in-plane selective-area growth technique for InSb-Al semiconductor-superconductor nanowire networks with excellent quantum transport properties. Defect-free transport channels in InSb nanowire networks are realized on insulating, but heavily mismatched InP substrates by 1) full relaxation of the lattice mismatch at the nanowire/substrate interface on a (111)B substrate orientation, 2) nucleation of a complete network from a single nucleation site, which is accomplished by optimizing the surface diffusion length of the adatoms. Essential quantum transport phenomena for topological quantum computing are demonstrated in these structures including phase-coherent transport up to 10 $\mu$m and a hard superconducting gap accompanied by 2$e$-periodic Coulomb oscillations with an Al-based Cooper pair island integrated in the nanowire network., Comment: Data repository is available at https://doi.org/10.5281/zenodo.4589484 . Author version of the text before peer review, while see DOI for the published version

Published
2021
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3. Author Correction: In-plane selective area InSb–Al nanowire quantum networks

Author

Op het Veld, Roy L. M., Xu, Di, Schaller, Vanessa, Verheijen, Marcel A., Peters, Stan M. E., Jung, Jason, Tong, Chuyao, Wang, Qingzhen, de Moor, Michiel W. A., Hesselmann, Bart, Vermeulen, Kiefer, Bommer, Jouri D. S., Lee, Joon Sue, Sarikov, Andrey, Pendharkar, Mihir, Marzegalli, Anna, Koelling, Sebastian, Kouwenhoven, Leo P., Miglio, Leo, Palmstrøm, Chris J., Zhang, Hao, and Bakkers, Erik P. A. M.

Published
2021
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4. In-plane selective area InSb–Al nanowire quantum networks

Author

Op het Veld, Roy L. M., Xu, Di, Schaller, Vanessa, Verheijen, Marcel A., Peters, Stan M. E., Jung, Jason, Tong, Chuyao, Wang, Qingzhen, de Moor, Michiel W. A., Hesselmann, Bart, Vermeulen, Kiefer, Bommer, Jouri D. S., Sue Lee, Joon, Sarikov, Andrey, Pendharkar, Mihir, Marzegalli, Anna, Koelling, Sebastian, Kouwenhoven, Leo P., Miglio, Leo, Palmstrøm, Chris J., Zhang, Hao, and Bakkers, Erik P. A. M.

Published
2020
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5. Author Correction: In-plane selective area InSb–Al nanowire quantum networks (Communications Physics, (2020), 3, 1, (59), 10.1038/s42005-020-0324-4)

Author

Op het Veld, Roy L.M., Xu, Di, Schaller, Vanessa, Verheijen, Marcel A., Peters, Stan M.E., Jung, Jason, Tong, Chuyao, Wang, Qingzhen, de Moor, Michiel W.A., Hesselmann, Bart, Vermeulen, Kiefer, Bommer, Jouri D.S., Lee, Joon Sue, Sarikov, Andrey, Pendharkar, Mihir, Marzegalli, Anna, Koelling, Sebastian, Kouwenhoven, Leo P., Miglio, Leo, Palmstrøm, Chris J., Zhang, Hao, Bakkers, Erik P.A.M., Op het Veld, Roy L.M., Xu, Di, Schaller, Vanessa, Verheijen, Marcel A., Peters, Stan M.E., Jung, Jason, Tong, Chuyao, Wang, Qingzhen, de Moor, Michiel W.A., Hesselmann, Bart, Vermeulen, Kiefer, Bommer, Jouri D.S., Lee, Joon Sue, Sarikov, Andrey, Pendharkar, Mihir, Marzegalli, Anna, Koelling, Sebastian, Kouwenhoven, Leo P., Miglio, Leo, Palmstrøm, Chris J., Zhang, Hao, and Bakkers, Erik P.A.M.

Abstract

The Data availability statement of this article has been modified to add the accession link to the raw data. The old Data availability statement read “Materials and data that support the findings of this research are available within the paper. All data are available from the corresponding author upon request”. This has been replaced by “Materials and data that support the findings of this research are available within the paper. The raw data have been deposited at https://zenodo.org/record/4589484#.YEoEOy1Y7Sd”. This has been corrected in both the HTML and PDF version of the article.

Published
2021

6. In-plane selective area InSb–Al nanowire quantum networks

Author

Op het Veld, R, Xu, D, Schaller, V, Verheijen, M, Peters, S, Jung, J, Tong, C, Wang, Q, de Moor, M, Hesselmann, B, Vermeulen, K, Bommer, J, Sue Lee, J, Sarikov, A, Pendharkar, M, Marzegalli, A, Koelling, S, Kouwenhoven, L, Miglio, L, Palmstrøm, C, Zhang, H, Bakkers, E, Op het Veld, Roy L. M., Xu, Di, Schaller, Vanessa, Verheijen, Marcel A., Peters, Stan M. E., Jung, Jason, Tong, Chuyao, Wang, Qingzhen, de Moor, Michiel W. A., Hesselmann, Bart, Vermeulen, Kiefer, Bommer, Jouri D. S., Sue Lee, Joon, Sarikov, Andrey, Pendharkar, Mihir, Marzegalli, Anna, Koelling, Sebastian, Kouwenhoven, Leo P., Miglio, Leo, Palmstrøm, Chris J., Zhang, Hao, Bakkers, Erik P. A. M., Op het Veld, R, Xu, D, Schaller, V, Verheijen, M, Peters, S, Jung, J, Tong, C, Wang, Q, de Moor, M, Hesselmann, B, Vermeulen, K, Bommer, J, Sue Lee, J, Sarikov, A, Pendharkar, M, Marzegalli, A, Koelling, S, Kouwenhoven, L, Miglio, L, Palmstrøm, C, Zhang, H, Bakkers, E, Op het Veld, Roy L. M., Xu, Di, Schaller, Vanessa, Verheijen, Marcel A., Peters, Stan M. E., Jung, Jason, Tong, Chuyao, Wang, Qingzhen, de Moor, Michiel W. A., Hesselmann, Bart, Vermeulen, Kiefer, Bommer, Jouri D. S., Sue Lee, Joon, Sarikov, Andrey, Pendharkar, Mihir, Marzegalli, Anna, Koelling, Sebastian, Kouwenhoven, Leo P., Miglio, Leo, Palmstrøm, Chris J., Zhang, Hao, and Bakkers, Erik P. A. M.

Abstract

Strong spin–orbit semiconductor nanowires coupled to a superconductor are predicted to host Majorana zero modes. Exchange (braiding) operations of Majorana modes form the logical gates of a topological quantum computer and require a network of nanowires. Here, we utilize an in-plane selective area growth technique for InSb–Al semiconductor–superconductor nanowire networks. Transport channels, free from extended defects, in InSb nanowire networks are realized on insulating, but heavily mismatched InP (111)B substrates by full relaxation of the lattice mismatch at the nanowire/substrate interface and nucleation of a complete network from a single nucleation site by optimizing the surface diffusion length of the adatoms. Essential quantum transport phenomena for topological quantum computing are demonstrated in these structures including phase-coherence lengths exceeding several micrometers with Aharonov–Bohm oscillations up to five harmonics and a hard superconducting gap accompanied by 2e-periodic Coulomb oscillations with an Al-based Cooper pair island integrated in the nanowire network.

Published
2020

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