https://doi.org/10.1140/epjs/s11734-025-02020-0
Regular Article
Channel capacity of small modular quantum networks in the ultrastrongly coupled regime
1
Dipartimento di Fisica e Astronomia “Ettore Majorana”, Università di Catania, Via Santa Sofia 64, 95123, Catania, Italy
2
Istituto Nazionale di Fisica Nucleare, Sezione di Catania, Via Santa Sofia 64, 95123, Catania, Italy
3
Center for Nonlinear and Complex Systems, Dipartimento di Scienza e Alta Tecnologia, Universitá degli Studi dell’Insubria, Via Valleggio 11, 22100, Como, Italy
4
Istituto Nazionale di Fisica Nucleare, Sezione di Milano, Via Celoria 16, 20133, Milan, Italy
5
CNR-IMM, Catania (University Unit), Consiglio Nazionale delle Ricerche, Via Santa Sofia 64, 95123, Catania, Italy
a
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Received:
15
July
2025
Accepted:
10
October
2025
Published online:
22
October
2025
We investigate state transfer in modular quantum computer architectures exploiting the ultrastrong coupling regime of interaction between quantum processing units and ICs. We show that protocols based on adiabatic coherent transport may achieve near-ideal single-letter quantum capacity and robustness against parametric fluctuations suppressing leakage induced by the dynamical Casimir effect.
© The Author(s) 2025
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