Quantum simulation of an exotic quantum critical point in a two-site charge Kondo circuit

Pouse, Winston; Peeters, Lucas; Hsueh, Connie L.; Gennser, U.; Cavanna, A.; Kastner, M. A.; Mitchell, Andrew K.; Goldhaber‐Gordon, David

doi:10.1038/s41567-022-01905-4

Cited by 24 publications

(12 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, the deeper theoretical investigation of the strong central coupling of this setup [54,55] in the Toulouse limit showed that a Z 3 parafermion emerging at the critical point, was already present in the experimental device of Ref. [53].…”

Section: Introductionmentioning

confidence: 74%

“…Extending the proposal of the weak coupling between two CKCs [25] to the regime of almost transparent QPC in the central area of the DCKC, the very recent experiment [53] and theory [54,55] have investigated the strong coupling limit. Let us comment on the connection between the weak and strong coupling regimes of the DCKCs.…”

Section: Discussionmentioning

confidence: 99%

“…We consider a DCKC device (see Fig. 1) formed by two CKCs describing a very recent experiment [53]. The building block for each CKC is a QD-QPC structure implemented in experiment [36].…”

Section: Proposed Experimental Setup and Theoretical Modelmentioning

confidence: 99%

“…As a CKC is considered as an artificial quantum simulator for the technology of quantum computer, scaling up the CKCs to clusters or lattices is challenging and it is important to understand the nature of the coupling between neighboring QDs. For this motivation, the experiment [53] has implemented a two-island charge Kondo device in which two QDs are coupled together and each one is also strongly coupled to an electrode through a QPC. The authors investigated the quantum phase transition at the triple point where the charge configurations are degenerate.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Teachers’ awareness of happy schools with UNESCO items: a case study of a primary school in Hanoi, Vietnam

Nguyen¹,

Le²,

Nguyen³

et al. 2022

VMOST

View full text Add to dashboard Cite

This article provides the practice of primary teachers’ awareness of happy schools through a survey questionnaire based on 22 items from the UNESCO criteria on happy schools. Their opinions were shared after a number of workshop activities that teach the practice of happy schools in Quan Hoa primary school, Cau Giay district, Hanoi. To add more research detail, the authors performed an in-depth interview with the vice principal. The research results showed that primary teachers’ awareness was at a good level (100% agreed). Twenty-seven teachers in this workshop gave a detailed and reflective explanation of happy schools. Then, the authors provided a number of suggestions to spread the idea of happy schools in practice, within primary schools in particular, and for all schools in general, according to the UNESCO items, which are on the move in regulations and curricula at the Bureau of Education and Training of Hanoi these days, especially in the context of the 2018 National Education Curriculum implemented since the 2020-2021 school year.

show abstract

Section: Introductionmentioning

confidence: 74%

Section: Discussionmentioning

confidence: 99%

“…We consider a DCKC device (see Fig. 1) formed by two CKCs describing a very recent experiment [53]. The building block for each CKC is a QD-QPC structure implemented in experiment [36].…”

Section: Proposed Experimental Setup and Theoretical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Teachers’ awareness of happy schools with UNESCO items: a case study of a primary school in Hanoi, Vietnam

Nguyen¹,

Le²,

Nguyen³

et al. 2022

VMOST

View full text Add to dashboard Cite

show abstract

“…We analyzed an electronic Mach-Zehnder interferometer in the quantum Hall regime as a proposed setup to directly probe longstanding predictions on the scattering phase and sub-unitary scattering amplitude of single electrons in the multi-channel Kondo effect. The setup in general allows probing any quantum impurity model including multiple-impurity systems exhibiting exotic critical points as recently studied experimentally [31,32]. An interesting future direction would be to use such an interferometer to probe the phase and possibly non-abelian statistics of Kondo anyons [33][34][35][36] by placing multiple dots along the chiral interference arm.…”

mentioning

confidence: 99%

Probing single-electron scattering through a non-Fermi liquid charge-Kondo device

Sela¹,

Goldhaber‐Gordon²,

Anthore³

et al. 2023

Preprint

View full text Add to dashboard Cite

Among the exotic and yet unobserved features of multi-channel Kondo impurity models is their sub-unitary single electron scattering. In the two-channel Kondo model, for example, an incoming electron is fully scattered into a many-body excitation such that the single particle Green function vanishes. Here we propose to directly observe these features in a charge-Kondo device encapsulated in a Mach-Zehnder interferometer -within a device already studied in Ref. 1. We provide detailed predictions for the visibility and phase of the Aharonov-Bohm oscillations depending on the number of coupled channels and the asymmetry of their couplings.

show abstract

Hierarchical entanglement shells of multichannel Kondo clouds

2023

View full text Add to dashboard Cite

Impurities or boundaries often impose nontrivial boundary conditions on a gapless bulk, resulting in distinct boundary universality classes for a given bulk, phase transitions, and non-Fermi liquids in diverse systems. The underlying boundary states however remain largely unexplored. This is related with a fundamental issue how a Kondo cloud spatially forms to screen a magnetic impurity in a metal. Here we predict the quantum-coherent spatial and energy structure of multichannel Kondo clouds, representative boundary states involving competing non-Fermi liquids, by studying quantum entanglement between the impurity and the channels. Entanglement shells of distinct non-Fermi liquids coexist in the structure, depending on the channels. As temperature increases, the shells become suppressed one by one from the outside, and the remaining outermost shell determines the thermal phase of each channel. Detection of the entanglement shells is experimentally feasible. Our findings suggest a guide to studying other boundary states and boundary-bulk entanglement.

show abstract

Quantum simulation of an exotic quantum critical point in a two-site charge Kondo circuit

Cited by 24 publications

References 59 publications

Teachers’ awareness of happy schools with UNESCO items: a case study of a primary school in Hanoi, Vietnam

Teachers’ awareness of happy schools with UNESCO items: a case study of a primary school in Hanoi, Vietnam

Probing single-electron scattering through a non-Fermi liquid charge-Kondo device

Hierarchical entanglement shells of multichannel Kondo clouds

Contact Info

Product

Resources

About