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A pristine suspended carbon nanotube is a near ideal environment to host long-lived quantum states. For this reason, they have been used as the core element of qubits and to explore numerous condensed matter physics phenomena. One of the…

Applied Physics · Physics 2024-01-09 Tim Althuon , Tino Cubaynes , Aljoscha Auer , Christoph Sürgers , Wolfgang Wernsdorfer

A single hole spin in a semiconductor quantum dot has emerged as a quantum bit that is potentially superior to an electron spin. A key feature of holes is that they have a greatly reduced hyperfine interaction with nuclear spins, which is…

Mesoscale and Nanoscale Physics · Physics 2011-11-14 Alex Greilich , Samuel G. Carter , Danny Kim , Allan S. Bracker , Daniel Gammon

Gate-defined quantum dots define an attractive platform for quantum computation and have been used to confine individual charges in a planar array. Here, we demonstrate control over vertical double quantum dots confined in a double quantum…

Mesoscale and Nanoscale Physics · Physics 2024-07-11 Alexander Ivlev , Hanifa Tidjani , Stefan Oosterhout , Amir Sammak , Giordano Scappucci , Menno Veldhorst

Enhancement-mode Si/SiGe electron quantum dots have been pursued extensively by many groups for \revEdit{their} potential in quantum computing. Most of the reported dot designs utilize multiple metal-gate layers and use Si/SiGe…

Mesoscale and Nanoscale Physics · Physics 2016-09-21 T. M. Lu , J. K. Gamble , R. P. Muller , E. Nielsen , D. Bethke , G. A. Ten Eyck , T. Pluym , J. R. Wendt , J. Dominguez , M. P. Lilly , M. S. Carroll , M. C. Wanke

Spins confined in quantum dots are a leading candidate for solid-state quantum bits that can be coherently controlled by optical pulses. There are, however, many challenges to developing a scalable multibit information processing device…

Mesoscale and Nanoscale Physics · Physics 2012-09-26 Sophia E. Economou , Juan I. Climente , Antonio Badolato , Allan S. Bracker , Daniel Gammon , Matthew F. Doty

Spins based in silicon provide one of the most promising architectures for quantum computing. Quantum dots are an inherently scalable technology. Here, we combine these two concepts into a workable design for a silicon-germanium quantum…

Confining electrons or holes in quantum dots formed in the channel of industry-standard fully depleted silicon-on-insulator CMOS structures is a promising approach to scalable qubit architectures. In this communication, we present…

The controlled integration of quantum dots (QDs) as single-photon emitters into quantum light sources is essential for the implementation of large-scale quantum networks. In this study, we employ the deterministic in-situ electron-beam…

Mesoscale and Nanoscale Physics · Physics 2025-10-21 Avijit Barua , Kartik Gaur , Leo J. Roche , Suk In Park , Priyabrata Mudi , Sven Rodt , Jin-Dong Song , Stephan Reitzenstein

Nanowire heterostructures define high-quality few-electron quantum dots for nanoelectronics, spintronics and quantum information processing. We use a cooled scanning probe microscope (SPM) to image and control an InAs quantum dot in an…

Mesoscale and Nanoscale Physics · Physics 2009-11-13 A. C. Bleszynski-Jayich , L. E. Froberg , M. T. Bjork , H. J. Trodahl , L. Samuelson , R. M. Westervelt

This paper reports the compatibility of heterostructure-based spin qubit devices with industrial CMOS technology. It features Si/Si-Ge quantum dot devices fabricated using Infineon's 200 mm production line within a restricted thermal…

Gate-tunable transmon qubits are based on quantum conductors used as weak links within hybrid Josephson junctions. These gatemons have been implemented in just a handful of systems, all relying on extended conductors, namely epitaxial…

Mesoscale and Nanoscale Physics · Physics 2025-08-29 H. Riechert , S. Annabi , A. Peugeot , H. Duprez , M. Hantute , K. Watanabe , T. Taniguchi , E. Arrighi , J. Griesmar , J. -D. Pillet , L. Bretheau

A top-gated single wall carbon nanotube is used to define three coupled quantum dots in series between two electrodes. The additional electron number on each quantum dot is controlled by top-gate voltages allowing for current measurements…

Mesoscale and Nanoscale Physics · Physics 2008-04-23 K. Grove-Rasmussen , H. I. Jørgensen , T. Hayashi , P. E. Lindelof , T. Fujisawa

Indium antimonide (InSb) two-dimensional electron gases (2DEGs) have a unique combination of material properties: high electron mobility, strong spin-orbit interaction, large Land\'{e} g-factor, and small effective mass. This makes them an…

We implement silicon quantum dot devices with two layers of gate electrodes using a self-alignment technique, which allows for ultra-small gate lengths and intrinsically perfect layer-to-layer alignment. In a double quantum dot system, we…

The aim of presented research is to design a nanodevice based on a gate-defined quantum dot within a MoS$_2$ monolayer in which we confine a single electron. By applying control voltages to the device gates we modulate the confinement…

Mesoscale and Nanoscale Physics · Physics 2019-12-18 J. Pawłowski

A scalable quantum information processing architecture based on silicon metal-oxide-semiconductor technology is presented, combining quantum hardware elements from planar and 3D silicon-on-insulator technologies. This architecture is…

Quantum Physics · Physics 2022-08-22 Michael A. Fogarty

Silicon, the main constituent of microprocessor chips, is emerging as a promising material for the realization of future quantum processors. Leveraging its well-established complementary metal-oxide-semiconductor (CMOS) technology would be…

Mesoscale and Nanoscale Physics · Physics 2016-12-21 R. Maurand , X. Jehl , D. Kotekar Patil , A. Corna , H. Bohuslavskyi , R. Laviéville , L. Hutin , S. Barraud , M. Vinet , M. Sanquer , S. De Franceschi

Epitaxially-grown semiconductor quantum dots (QDs) provide an attractive platform for the development of deterministic sources of high-quality quantum states of light. Such non-classical light sources are essential for quantum information…

Mesoscale and Nanoscale Physics · Physics 2023-08-30 Lucie Leguay , Abhiroop Chellu , Joonas Hilska , Esperanza Luna , Andrei Schliwa , Mircea Guina , Teemu Hakkarainen

Self-assembled semiconductor quantum dot is a new type of artificially designed and grown function material which exhibits quantum size effect, quantum interference effect, surface effect, quantum tunneling-Coulumb-blockade effect and…

Mesoscale and Nanoscale Physics · Physics 2007-12-07 Jie Sun , Peng Jin , Zhanguo Wang

Confining electrons or holes in quantum dots formed in the channel of industry-standard fully depleted silicon-on-insulator CMOS structures is a promising approach to scalable qubit architectures. In this article, we present our results on…