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Superconducting Qubits

From coherent to fermionized microwave photons in a superconducting transmission line

arXiv
Authors: Alberto Tabarelli de Fatis, Stephanie Matern, Gianluca Rastelli, Iacopo Carusotto

Year

2026

Paper ID

3947

Status

Preprint

Abstract Read

~2 min

Abstract Words

94

Citations

N/A

Abstract

We investigate superconducting transmission lines as a novel platform for realizing a quantum fluid of microwave photons in a propagating geometry. We predict that the strong photon-photon interactions provided by the intrinsic nonlinearity of Josephson junctions are sufficient to enter a regime of strongly interacting photons for realistic parameters. A suitable tapering of the transmission line parameters allows for the adiabatic conversion of an incident coherent field into a Tonks-Girardeau gas of fermionized photons close to its ground state. Signatures of the strong correlations are anticipated in the correlation properties of the transmitted light.

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  • This paper contributes to the Superconducting Qubits research area in the Quantum Articles archive.
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  • We investigate superconducting transmission lines as a novel platform for realizing a quantum fluid of microwave photons in a propagating geometry.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2601.07659 [2] arXiv https://arxiv.org/abs/2601.07659 [3] Publisher https://arxiv.org/abs/2601.07659

Local Citation Graph (Related-Paper Links)

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External citation index: OpenAlex citation signal

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