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Title: Novel Nanotube Multiquantum Dot Devices

Abstract

Addressable quantum states well isolated from the environment are of considerable interest for quantum information science and technology. Carbon nanotubes are an appealing system, since a perfect crystal can be grown without any missing atoms and its cylindrical structure prevents ill-defined atomic arrangement at the surface. Here, we develop a reliable process to fabricate compact multielectrode circuits that can sustain the harsh conditions of the nanotube growth. Nanotubes are suspended over multiple gate electrodes, which are themselves structured over narrow dielectric ridges to reduce the effect of the charge fluctuators of the substrate. We measure high-quality double- and triple-quantum dot charge stability diagrams. Transport measurements through the triplequantum dot indicate long-range tunneling of single electrons between the left and right quantum dots. This work paves the way to the realization of a new generation of condensed-matter devices in an ultraclean environment, including spin qubits, mechanical qubits, and quantum simulators.

Authors:
 [1];  [1]; ORCiD logo [2];  [1];  [1];  [1];  [1];  [1];  [1];  [2]; ORCiD logo [1]
  1. ICFO - Institut De Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels, Barcelona, Spain
  2. Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, United States
Publication Date:
Research Org.:
Inst. de Ciencies Fotoniques, Barcelona (Spain)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1894748
Alternate Identifier(s):
OSTI ID: 1897611
Grant/Contract Number:  
AC02- 06CH11357; AC02-06CH11357
Resource Type:
Published Article
Journal Name:
Nano Letters
Additional Journal Information:
Journal Name: Nano Letters Journal Volume: 22 Journal Issue: 21; Journal ID: ISSN 1530-6984
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; quantum device; carbon nanotube; double-quantum dot; charge fluctuators; electrical conductivity; electrodes; electrostatic potential; nanotubes

Citation Formats

Tormo-Queralt, R., Møller, C. B., Czaplewski, D. A., Gruber, G., Cagetti, M., Forstner, S., Urgell-Ollé, N., Sanchez-Naranjo, J. A., Samanta, C., Miller, C. S., and Bachtold, A. Novel Nanotube Multiquantum Dot Devices. United States: N. p., 2022. Web. doi:10.1021/acs.nanolett.2c03034.
Tormo-Queralt, R., Møller, C. B., Czaplewski, D. A., Gruber, G., Cagetti, M., Forstner, S., Urgell-Ollé, N., Sanchez-Naranjo, J. A., Samanta, C., Miller, C. S., & Bachtold, A. Novel Nanotube Multiquantum Dot Devices. United States. https://doi.org/10.1021/acs.nanolett.2c03034
Tormo-Queralt, R., Møller, C. B., Czaplewski, D. A., Gruber, G., Cagetti, M., Forstner, S., Urgell-Ollé, N., Sanchez-Naranjo, J. A., Samanta, C., Miller, C. S., and Bachtold, A. Wed . "Novel Nanotube Multiquantum Dot Devices". United States. https://doi.org/10.1021/acs.nanolett.2c03034.
@article{osti_1894748,
title = {Novel Nanotube Multiquantum Dot Devices},
author = {Tormo-Queralt, R. and Møller, C. B. and Czaplewski, D. A. and Gruber, G. and Cagetti, M. and Forstner, S. and Urgell-Ollé, N. and Sanchez-Naranjo, J. A. and Samanta, C. and Miller, C. S. and Bachtold, A.},
abstractNote = {Addressable quantum states well isolated from the environment are of considerable interest for quantum information science and technology. Carbon nanotubes are an appealing system, since a perfect crystal can be grown without any missing atoms and its cylindrical structure prevents ill-defined atomic arrangement at the surface. Here, we develop a reliable process to fabricate compact multielectrode circuits that can sustain the harsh conditions of the nanotube growth. Nanotubes are suspended over multiple gate electrodes, which are themselves structured over narrow dielectric ridges to reduce the effect of the charge fluctuators of the substrate. We measure high-quality double- and triple-quantum dot charge stability diagrams. Transport measurements through the triplequantum dot indicate long-range tunneling of single electrons between the left and right quantum dots. This work paves the way to the realization of a new generation of condensed-matter devices in an ultraclean environment, including spin qubits, mechanical qubits, and quantum simulators.},
doi = {10.1021/acs.nanolett.2c03034},
journal = {Nano Letters},
number = 21,
volume = 22,
place = {United States},
year = {Wed Oct 26 00:00:00 EDT 2022},
month = {Wed Oct 26 00:00:00 EDT 2022}
}

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