Coulomb-mediated antibunching of an electron pair surfing on sound

Wang, Junliang; Edlbauer, Hermann; Richard, Aymeric; Ota, Shunsuke; Park, Wanki; Shim, Jeongmin; Ludwig, Arne; Wieck, Andreas D.; Sim, Hyung Sub; Urdampilleta, Matias; Meunier, Tristan; Kodera, Tetsuo; Kaneko, Nobu-Hisa; Sellier, H.; Waintal, Xavier; Takada, Shintaro; Bäuerle, Christopher

doi:10.1038/s41565-023-01368-5

Cited by 16 publications

(2 citation statements)

References 37 publications

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“…Additionally, the exploration of single electron transport utilizing surface acoustic waves in graphene presents a novel avenue, leveraging the unique properties of both the material and wave-based manipulation. Investigating the potential for Coulomb-induced anti-bunching [380][381][382] with single electrons in graphene, coupled with single-shot detection, stands as a challenging yet transformative goal with implications for quantum information processing. Furthermore, the pursuit of flying electron qubits in non-chiral geometry [383] opens up innovative pathways for quantum computing, capitalizing on graphene's exceptional electronic structure.…”

Section: Discussionmentioning

confidence: 99%

Electron wave and quantum optics in graphene

Chakraborti,

Gorini,

Knothe

et al. 2024

J. Phys.: Condens. Matter

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In the last decade, graphene has become an exciting platform for electron optical experiments, in some aspects superior to conventional two-dimensional electron gases (2DEGs). A major advantage, besides the ultra-large mobilities, is the fine control over the electrostatics,which gives the possibility of realising gap-less and compact p-n interfaces with high precision. The latter host non-trivial states, \eg, snake states in moderate magnetic fields, and serve as building blocks of complex electron interferometers. Thanks to the Dirac spectrum and its non-trivial Berry phase, the internal (valley and sublattice) degrees of freedom, and the possibility to tailor the band structure using proximity effects, such interferometers open up a completely new playground based on novel device architectures. In this review, we introduce the theoretical background of graphene electron optics, fabrication methods used to realise electron-optical devices, and techniques for corresponding numerical simulations. Based on this, we give a comprehensive review of ballistic transport experiments and simple building blocks of electron optical devices both in single and bilayer graphene, highlighting the novel physics that is brought in compared to conventional 2DEGs. After describing the different magnetic field regimes in graphene p-n junctions and nanostructures, we conclude by discussing the state of the art in graphene-based Mach-Zender and Fabry-Perot interferometers.

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Section: Discussionmentioning

confidence: 99%

Electron wave and quantum optics in graphene

Chakraborti,

Gorini,

Knothe

et al. 2024

J. Phys.: Condens. Matter

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“…11) Furthermore, in the field of electron-quantum optics, various studies have been conducted. [12][13][14][15][16][17][18][19][20][21] In combination with quantum dots on semiconductors, the transport of single electrons across micrometer distances has been demonstrated, 12,13,16) as well as the coherent transport of electron spins. 15,17) The use of SAWs in quantum information processing has been proposed for some time, [22][23][24] and recently the development of electron flying qubits 25,26) has been studied.…”

mentioning

confidence: 99%

Suppression of electromagnetic crosstalk by differential excitation for SAW generation

Ota,

Okazaki,

Nakamura

et al. 2024

Appl. Phys. Express

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Surface acoustic waves (SAWs) hold a vast potential in various fields such as spintronics, quantum acoustics, and electron-quantum optics, but an electromagnetic wave emanating from SAW generation circuits has often been a major hurdle. Here, we investigate a differential excitation method of interdigital transducers (IDTs) to generate SAWs while reducing the electromagnetic wave. The results show that electromagnetic waves are suppressed by more than 90 % in all directions. This suppression overcomes the operating limits and improves the scalability of SAW systems. Our results promise to facilitate the development of SAW-based applications in a wide range of research fields.

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Tailoring Single-Electron Emission Distributions in the Time–Energy Phase Space

Kim,

Park,

Park

et al. 2024

Nano Lett.

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The precise characterization and control of single-electron wave functions emitted from a single-electron source are essential for advancing electron quantum optics. Here, we introduce a method for tailoring a single-electron emission distribution using energy filtering, enabling selective control of the distribution under various energy barrier conditions of the filter. The tailored electron is studied by reconstructing its Wigner distribution in the time−energy phase space using the continuous-variable tomography method. Our results reveal that the filtering cuts the portion of the distribution below the energy−barrier height of the filter in the time−energy space. While the filtering is demonstrated in a classical regime of the emitted electrons, we expect that this study significantly contributes to the design and implementation of advanced experiments toward quantum information processing based on single electrons.

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Coulomb-mediated antibunching of an electron pair surfing on sound

Cited by 16 publications

References 37 publications

Electron wave and quantum optics in graphene

Electron wave and quantum optics in graphene

Suppression of electromagnetic crosstalk by differential excitation for SAW generation

Tailoring Single-Electron Emission Distributions in the Time–Energy Phase Space

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