**Prof. Dr. Chiara Macchiavello**, Physics Department, University of Pavia, Largo Giorgio La Pira 7 – 27100 Pavia, Italy

**Articles**: *An artificial neuron implemented on an actual quantum processor* with Francesco Tacchino, Chiara Macchiavello, Dario Gerace & Daniele Bajoni, *npj Quantum Inf* **5, **26 (2019). https://doi.org/10.1038/s41534-019-0140-4**ArXiv** (121): Complementarity and correlations, with Lorenzo Maccone, Dagmar Bruss, 2015 • Optimal estimation of multiple phases, 2003**Books**: *Quantum Computation and Quantum Information Theo*ry w/A. Zeilinger, World Scientific, 2000**CV**

Editor, PHYSICAL REVIEW LETTERS, *Foundations of Quantum Mechanics* with Jonathan Barrett, Oxford**Google Scholar****Homepage**: Falling Walls**inSPIRE**^{HEP}

**Key concepts**: Quantum communication, quantum computation, foundations of quantum physics, open quantum systems

First email: 14 February 2022

Dear Prof. Dr. Chiara Macchiavello:

Within our website, as a result of your work with Anton Zeilinger, there is a reference to you along with G.M. Palma as the editors of “Quantum computation and quantum information theory”, World Scientific (2000). As a result of this letter and memory-being-memory, there is also a reference page to your work and this note.

You are out on the edges of inquiry and I wonder how you might answer my idiosyncratic questions: Is it possible that quantum physics is a limited domain within the physical universe? …that it is not ubiquitous? …that it is not the defining condition of all space and time?

We have embraced such ideation via Planck’s base units and base-2 notation. Out of 202 notations that encapsulate the universe from the Planck Length and Planck Time to the size and age of the universe today, there are no less than 64 doublings before any kind of measurement is possible.

Do you know if any physicists of your caliber have considered that infinitesimal progression? Of course, string-and-M theory, Langlands programs and a few others are within that domain, yet has anybody thought that there are 64 doublings from the Planck base units prior to any possible measurement?

It is within that domain there could well be possibilities for perfected states within space-time. The densities and durations are too tight for fluctuations. Crazy!?! Probably. Possible? Maybe. If there is an iota of possibility, shouldn’t we be exploring this further?

Thank you.

Warmest regards,

Bruce

PS. If you ever want to add, change or delete anything from that reference page to you, simply tell me, and it will be done immediately. Thank you. -BEC

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skype: chiara_macchiavello