The maximum speed of signal transmission in microchips is about one petaherz (one million gigahertz), which is about 100,000 times faster than current transistors. Physicists from the Ludwig-Maximilians-Universität München, the Max Planck Institute of Quantum Optics and Vienna and Graz Universities of Technology have recently published this finding in the scientific journal Nature Communications. Whether computer chips of this maximum speed can ever actually be produced is, however, questionable.

Original publication:
The speed limit of optoelectronics
M. Ossiander, K. Golyari, K. Scharl, L. Lehnert, F. Siegrist, J. Bürger, D. Zimin, J. Gessner, M. Weidman, I. Floss, V. Smejkal, S. Donsa, C. Lemell, F. Libisch, N. Karpowicz, J. Burgdörfer, F. Krausz, M. Schultze
Nature Communications 13, 1620 (2022)