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arXiv · 2104.07371

Propagation of Picosecond Pulses on Superconducting Transmission Line Interconnects

Vladimir V. Talanov·Derek Knee·David Harms·Kieran Perkins·Andrew Urbanas·Jonathan Egan·Quentin Herr·Anna Herr
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Abstract

Interconnects are a major discriminator for superconducting digital technology, enabling energy efficient data transfer and high-bandwidth heterogeneous integration. We report a method to simulate propagation of picosecond pulses in superconducting passive transmission lines (PTLs). A frequency-domain propagator model obtained from the Ansys High Frequency Structure Simulator (HFSS) field solver is incorporated in a Cadence Spectre circuit model, so that the particular PTL geometry can be simulated in the time-domain. The Mattis-Bardeen complex conductivity of the superconductor is encoded in the HFSS field solver as a complex-conductivity insulator. Experimental and simulation results show that Nb 20 Ohm microstrip PTLs with 1um width can support propagation of a single-flux-quantum pulse up to 7mm and a double-flux-quantum pulse up to 28mm.

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Vladimir V. Talanov, Derek Knee, David Harms, Kieran Perkins, Andrew Urbanas, Jonathan Egan, Quentin Herr, Anna Herr. 2021-04-15. Propagation of Picosecond Pulses on Superconducting Transmission Line Interconnects. https://doi.org/10.1088/1361-6668/ac5783

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