Quartet tomography in multiterminal Josephson junctions

Ohnmacht, David Christian; Coraiola, Marco; García-Esteban, Juan José; Sabonis, Deividas; Nichele, Fabrizio; Belzig, Wolfgang; Cuevas, Juan Carlos

doi:10.1103/physrevb.109.l241407

Phys. Rev. B

2024

DOI: 10.1103/physrevb.109.l241407

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Quartet tomography in multiterminal Josephson junctions

David Christian Ohnmacht,

Marco Coraiola,

Juan José García-Esteban

et al.

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Cited by 3 publications

References 71 publications

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Flux-tunable Josephson effect in a four-terminal junction

Prosko,

Huisman,

Kulesh

et al. 2024

Phys. Rev. B

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Flux-tunable Josephson effect in a four-terminal junction

Prosko,

Huisman,

Kulesh

et al. 2024

Phys. Rev. B

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Ballistic Andreev interferometers

Mélin,

Rashid,

Kayyalha

2024

Phys. Rev. B

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Cooper quartets in interacting hybrid superconducting systems

Chirolli,

Braggio,

Giazotto

2024

Phys. Rev. Research

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Cooper quartets represent exotic fermion aggregates describing correlated matter at the basis of charge-4e superconductivity and offer a platform for studying four-body interactions, of interest for topologically protected quantum computing, nuclear matter simulations, and more general strongly correlated matter. Focusing on solid-state systems, we show how to quantum design Cooper quartets in a double-dot system coupled to ordinary superconducting leads through the introduction of an attractive interdot interaction. A fundamentally novel, maximally correlated double-dot ground state, in the form of a superposition of vacuum |0〉 and four-electron state |4e〉, emerges as a narrow resonance in a many-body quartet correlator that is accompanied by negligible pair correlations and features a rich phenomenology. The system represents an instance of correlated Andreev matter and the results open the way to the exploration of interaction effects in hybrid superconducting devices, and the study of novel correlated states of matter with ingredients available in a quantum solid-state laboratory. Published by the American Physical Society 2024

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Quartet tomography in multiterminal Josephson junctions

Cited by 3 publications

References 71 publications

Flux-tunable Josephson effect in a four-terminal junction

Flux-tunable Josephson effect in a four-terminal junction

Ballistic Andreev interferometers

Cooper quartets in interacting hybrid superconducting systems

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