Beyond the Qubit

Because it moves the field from impressive lab demos toworkloads you can actually run.
After a year of hosting Beyond the Qubit, I have learnedthis.
The real challenge is not the physics.
It is knowing what is real progress, while the answer is still uncertain.
Here is what I have learned so far.
First.
Quantum is no longer one story.
There are multiple credible technology paths, and it is genuinely difficulttoday to say which one will win.
Second.
Scaling is still underestimated.
Not just more qubits on a chip/unit, but also clustering chips together, andimproving error correction so you need fewer physical qubits for each logicalqubit.
Third.
A simple truth I keep repeating to myself.
A logical qubit is an error corrected qubit you can compute with reliably.
And today, the world still has no or only a very small number of them.
That is why the next milestone matters.
My working heuristic is this.
Around 100 logical qubits is where the first meaningful applications may startto appear.
And somewhere around 1,000 to 2,000 logical qubits is where many of the bigapplications start to open up, like molecular modelling and large scaleoptimization.
The exact number will depend on the application and theerror rates.
But the order of magnitude matters.
So if the industry reaches 100 logical qubits, it is notjust a benchmark.
It is a strong signal that scaling is working.
And it makes the path toward 1,000 plus feel less like science fiction and morelike an engineering roadmap.
That shift changes things.
Capital.
Talent.
Time horizons.
And the way society talks about quantum.
Now a second lesson for investors and builders.
This market could consolidate around a few winners.
That is exciting, but it also means technology risk remains high.
So where do you look if you want exposure without betting ona single horse?
Suppliers.
The enablers.
Because scaling does not just mean better chips.
It depends on the technology, for super conducting qubits it means morechannels, more calibration, more test, more wiring, more cooling, and bettererror correction tooling.
This is why I like studying the enabling layer.
Chip testing, control systems, interconnects, cryogenics, and error correctionsoftware.
These companies often aim to support more than one quantum technology path,which can mean earlier revenue and lower single technology risk.
Two examples I personally find interesting are OrangeQuantum Systems and QC Design.
Not investment advice, just examples of the enabling layer.
One more observation.
The world is spending enormous amounts on compute for AI.
Quantum is not the same as AI compute, and AI spend is not a direct driver ofquantum.
But it can accelerate adjacent tooling, packaging, photonics, and engineeringtalent that the quantum ecosystem also depends on.
Add geopolitics and digital sovereignty, and quantum becomeseven more strategic.
So yes.
Quantum still has uncertainty.
But the direction of travel is clear.
The next years are about proving that logical qubits canscale.
Through scale up, scale out, and better error correction.
That is what I will keep tracking on Beyond the Qubit.
Now I am curious about your view.
Which unlock do you think comes first on the road to 100logical qubits.
Scale up, scale out, or error correction.
If you want to receive the presentation, post presentationbelow in the comments.
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📌 Disclaimer: Thispost is shared on a personal basis and I do not represent any company
#QuantumComputing #QuantumTechnology#FaultTolerantQuantumComputing #LogicalQubits #QuantumErrorCorrection#QuantumHardware #DeepTechInvesting #Semiconductors

This post is a short summary of a longer conversation on theBeyond the Qubit podcast.
I sat down with the CEO of QC Design to talk about whatquantum computing really is once you strip away the metaphors.
A qubit is not a bit with uncertainty.
It is a fragile physical state.
You cannot read it without destroying it.
You cannot copy it.
You cannot inspect what it contains.
You never really ask a qubit a question.
What you actually do is prepare a physical system, let itevolve under carefully designed control pulses, and then force a measurement.
You get a single outcome. Not an answer, but a sample.
The qubit does not reason, choose, or understand thequestion.
It simply reacts to physical forces and collapses.
Seen this way, quantum computation looks less likecomputation and more like continuous damage control layered on top of aphysical process that barely exists long enough to be manipulated.
This perspective matters.
Because it exposes why scaling quantum systems is fundamentally an engineeringproblem, not a software one.
The full conversation goes much deeper into what this meansfor system design, abstractions, and where many roadmaps quietly break down.
More in the full episode of Beyond the Qubit.
https://youtu.be/9ydv1tFjgqo
 
Quantum #QuantumArchitecture
#ErrorCorrection #QuantumSoftware #BeyondTheQubit
 @IshDhand @QC_Design 
📌 Disclaimer: Thispost is shared on a personal basis and I do not represent any company

It’s blocked by design choices.”
That was one of thestrongest realizations from Part 2 of my deepdive with Ish Dhand, co-founder of QCDesign, on Beyond the Qubit.
Most people talkabout fault-tolerant quantum computing as if it’s a single problem.
In reality, it’s a design-space explosion.
That reframed how Ithink about progress in quantum.
What stood out to mein this part of the conversation:
• Hardware teamsdon’t struggle with one error, they struggle with many interacting imperfections at the same time
• Open-sourcesimulators can scale to thousands of qubits, but usually only by assuming very simplified error models
• Real hardware hasto deal with leakage, coherent errors, pulse timing, idling, cross-talk,  all at once
• Many of theseeffects only become visible at the scale of thousandsof physical qubits per logical qubit
This is where QCDesign plays a unique role.
Rather than bettingon a single error-correction code or architecture, they help hardware teams simulate realistic fault-tolerant systems beforebuilding them,  across platforms,codes, decoders, and noise models.
What really changedmy perspective:
Error correctionisn’t just about finding a better code.
It’s aboutunderstanding where engineering effort actuallypays off.
If leakage hurtsyour logical qubits more than erasures,
why spend yearsoptimizing the wrong thing?
If longer pulsesimprove gate fidelity but quietly destroy system performance through idlingerrors,
where’s the realoptimum?
These aren’tacademic questions.
They determine cost, timelines, and whether scaling is even feasible.
One line from Ishreally stuck with me:
Today, the cost of a truly useful fault-tolerantquantum computer is effectively infinite.
The real progress is making that number finite, andthen bringing it down.
That single sentencereframes the entire industry.
In this episode, wego deep into:
• why decoding speedmatters as much as code efficiency
• why “software willfix it later” is usually the wrong mindset
• why logicalfidelity matters more than raw qubit counts
• and why faulttolerance is becoming a full-stack engineeringproblem
If you care about how quantum computers will actually be built,  not just announced,  this conversation is worth your time.
🎙️Beyond the Qubit — Part 2 with Ish Dhand
🔗https://youtu.be/ugo3g1Mws2M
#FaultTolerantQuantum#QuantumArchitecture
#ErrorCorrection#QuantumSoftware #BeyondTheQubit
 
⁨@IshDhand⁩ ⁨@QC_Design⁩
 
📌 Disclaimer: This post is shared on a personal basis and I do notrepresent any company

That’s the question Ish Dhand has been obsessed with for years.
It’s also what ledhim from academia, to Xanadu, and now toco-founding QC Design.
I’m excited to sharethat Ish is joining me on Beyond the Qubit.
What struck me mostin our conversation wasn’t hype or timelines, it was how hard the problem really is.
A few takeaways thatstayed with me:
• Fault-tolerantquantum computers aren’t blocked by a single breakthrough, but by thousands of interacting design decisions
• Error correctionisn’t just a physics problem, it’s an architecture,control, and decoding problem all at once
• Many hardwareteams underestimate how early they needto think about fault tolerance
• Software canunlock orders-of-magnitude improvements,but only if it’s grounded in realistic noise models and hardware constraints
At one point, Ishdescribed QC Design as the Cadence / Synopsysof quantum computing.
Not building thehardware itself, but helping hardware teams understand what they’re actually building before they build it.
What I appreciatedmost was his bias for action:
ship early, getfeedback from real hardware teams, iterate fast, even when the problem space ismessy and incomplete.
In this episode, wego deep into:
• how logical qubitsreally emerge from physical ones
• why differentqubit platforms face fundamentally different error profiles
• why “software willfix it later” is often the wrong mental model
• and what actuallyneeds to go right for fault-tolerant quantum computing to arrive
If you care about how quantum systems are designed,  not just announced,  this is a conversation worth your time.
🎙️Beyond the Qubit,  episodewith Ish Dhand
🔗 (link)
https://youtu.be/GOuYABNmfjM
 
#QuantumComputing#FaultTolerantQuantum #QuantumArchitecture
#ErrorCorrection#QuantumSoftware #BeyondTheQubit
 
⁨@IshDhand⁩ ⁨@QC_Design⁩
 
📌 Disclaimer: This post is shared on a personal basis and I do notrepresent any company

Quantum’s “impossible problem” is finally shiftingfrom science → engineering.
 
In Part 2 of myconversation with Yuval Boger (CCO, QuEra)on Beyond the Qubit, we went deep into Error correction, Scaling and the physics that will determine which platforms survive.
Hereare the insights 👇
 
https://youtu.be/Ndr7cbcDHRc
 
 
1. Every qubit technology has a fundamental weakness…until you correct it.
Yuval put itbluntly:
“Qubitsare fragile. Everything in the universe wants to disturb them.”
Cosmic rays,vibrations, electromagnetic noise, even a gate failing 1 in 10,000 times becomes catastrophic when your algorithmrequires millions of operations.
This is why error correction is the real battleground.
Not qubit count.
Not coherence time.
Not marketingslides.
This clicked for me:you don’t win by adding more qubits, you win byadding the right ones.
 
2. Mobility changes everything about logical qubits.
Most qubit platformsare fixed in place.
Neutral atoms move, and that changes the math.
Yuval gave a visualI can’t unsee:
Two logical qubits,each made of five physical qubits.
Static hardware?
You must connectthem pair by pair, accumulating errorswith every handshake.
Neutral atoms?
➡️ Move the qubits physically
➡️ Apply one pulse of light
➡️ Create all interactionsin parallel
Parallelism → feweroperations
Fewer operations →fewer errors
Fewer errors → farfewer physical qubits needed per logical qubit
Neutral atoms aren’tjust another modality, they’re a differentscaling strategy.
 
3. The telecom analogy that reframes the entirearchitecture
I comparedsuperconducting qubits to fixed fiber and neutral atoms to wireless networks.
Yuval extended itbeautifully:
If the central nodefails, fixed-line users are stuck.
Wireless? You movethe tower closer and reconnect.
Neutral atomsprovide that same architectural freedom:
 
4. Neutral-atom scaling isn’t PowerPoint. It’sphysics.
Many companies claimthey’ll scale.
Yuval asked thequestion that matters:
“Areyou relying on miracles, or engineering?”
Neutral atoms scalethrough:
Scale-out acrossmachines? Possible.
But what struck meis that scaling within a single system has aclear physics-based roadmap, unlike many competing architectures.
 
5. Error correction is no longer theoretical, QuEra isdemonstrating it.
Yuvalwalked through the early steps:
 
He didn’t revealtheir full roadmap, but the direction is unmistakable.
 
6. Quantum is becoming practical and customers arevoting with usage, not words.
Yuval shared severalsignals that quantum is crossing from research into industry:
These aren’texperiments, they’re real workloads on real systems.
Talk is cheap; usageis not.
 
This isn’t hype.
This is earlyindustrialization.
 
🤔 Which modality do you believe reaches fault-tolerant scale first?
Neutral atoms?Superconducting? Trapped ions? Photonics?
Or somethingcompletely different?
I’d love to hearyour perspective.
 
#QuantumComputing,#QuantumTechnology #DeepTech, #BeyondTheQubit, #QuEra, #NeutralAtoms
#QuantumHardware,#FutureOfComputing, #QuantumAdvantage, #RydbergAtoms, #TechInnovation
#ScienceAndTechnology,#FrontierTech, #MIT, #Harvard, #Podcast
 
@Yuval Boger@QuEra
 
 
📌 Disclaimer: This post is shared on a personal basis and I do notrepresent any company