Low crosstalk modular flip-chip architecture for coupled superconducting qubits

Bibliographic Details
Title: Low crosstalk modular flip-chip architecture for coupled superconducting qubits
Authors: Ihssen, Soeren, Geisert, Simon, Jauma, Gabriel, Winkel, Patrick, Spiecker, Martin, Zapata, Nicolas, Gosling, Nicolas, Paluch, Patrick, Pino, Manuel, Reisinger, Thomas, Wernsdorfer, Wolfgang, Garcia-Ripoll, Juan Jose, Pop, Ioan M.
Publication Year: 2025
Collection: Quantum Physics
Subject Terms: Quantum Physics
More Details: We present a flip-chip architecture for an array of coupled superconducting qubits, in which circuit components reside inside individual microwave enclosures. In contrast to other flip-chip approaches, the qubit chips in our architecture are electrically floating, which guarantees a simple, fully modular assembly of capacitively coupled circuit components such as qubit, control, and coupling structures, as well as reduced crosstalk between the components. We validate the concept with a chain of three nearest neighbor coupled generalized flux qubits in which the center qubit acts as a frequency-tunable coupler. Using this coupler, we demonstrate a transverse coupling on/off ratio $\approx$ 50, zz-crosstalk $\approx$ 0.7 kHz between resonant qubits and isolation between the qubit enclosures > 60 dB.
Document Type: Working Paper
Access URL: http://arxiv.org/abs/2502.19927
Accession Number: edsarx.2502.19927
Database: arXiv
More Details
Description not available.