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The Quantum Leap

A Business and Investment-Centric Guide to the Evolving Quantum Landscape [Please be patient as I upload my content to this new (for me) platform]

Newsletter · By Russ Fein · Official site

Indexed issues, last 90 days
5
Latest publication
Sep 18, 2026
Audience
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Earliest in this view
Jul 10, 2026

Latest issues

  1. Issue · Sep 18, 2026

    What Actually Is Commercial Quantum Advantage? (opens the original)

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    Quantum computing has set multiple finish lines. Quantum Supremacy. Quantum Advantage. Commercial Quantum Advantage. They sound interchangeable but they are not. They are also moving finish lines. The early Quantum Supremacy claims were later refuted after the classical alternatives found better ways to execute the same experiment. So as quantum machines improve, so do classical machines. However, there is a wall that classical machines simply will not be able to get past – more on that later in

  2. Issue · Sep 4, 2026

    The Quantum Leap’s S/M/L Guide to “Quantum” (opens the original)

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    A few years ago, I started writing a series of Beginner Guides to quantum technology. My hope was to introduce readers to this strange and increasingly important field without math or physics and with minimal jargon. But “Beginner” means different things to different people. Some readers want the cocktail-party explanation. Others are familiar with qubits and superposition and want to know a bit more about what’s going on under the hood. And some are comfortable with the broad concepts and want

  3. Issue · Aug 18, 2026

    Quantum Unicorns (opens the original)

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    <img alt="" class="sizing-normal" height="928" src="https://substackcdn.com/image/fetch/$s_!MfUS!,w_1456,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Feab79bb7-b06b-47b0-b9e2-2582ffe48e93_1312x928.png"

  4. Issue · Jul 31, 2026

    The Modern-Day Quantum (Space) Race: The US vs China (opens the original)

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    <img alt="" class="sizing-normal" height="928" src="https://substackcdn.com/image/fetch/$s_!zV4-!,w_1456,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fc8e0d77c-5aac-4c12-92f8-24f80a0f10a5_1312x928.png"

  5. Issue · Jul 10, 2026

    What and When is Q-Day? (opens the original)

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    Many readers may remember “Y2K”, the global panic that permeated society in the months leading up to New Year’s Eve 2000. At that time, most computer systems stored years with two digits instead of four, so “99” meant 1999. But when the calendar rolled to “00,” some systems might read that as 1900 instead of 2000 which sounds almost quaint now. But at the time, it touched banking systems, airline systems, government systems, power systems, traffic lights, and all the other invisible plumbing tha

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