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XeedQ GmbH

Innovation, Development, and Marketing of Future Technologies

02/09/2026

In 2009, our founder Gopalakrishnan Balasubramanian helped answer a question quantum computing was stuck on: can a solid-state qubit remember its state long enough at room temperature to actually be useful?

Here is what the paper established.

Full paper linked in the bio.

(“Paper, Decoded” is a series where we unpack the physics papers that shaped how XeedQ's quantum computers actually work, one landmark study at a time.)

02/09/2026

In 2009, our founder Gopalakrishnan Balasubramanian helped answer a question quantum computing was stuck on: can a solid-state qubit remember its state long enough at room temperature to actually be useful?

Here is what the paper established.

Full paper linked in the comments.

(“Paper, Decoded” is a series where we unpack the physics papers that shaped how XeedQ's quantum computers actually work, one landmark study at a time.)

[ XeedQ, QuantumComputing, QuantumTechnology, Deeptech ]

31/08/2026

The same qubit can have three different coherence times and all of them are correct.

Sounds like a benchmarking contradiction, right? It isn't.

A qubit's reported coherence time depends strongly on the experiment and control sequence used to characterise it. Free-induction dephasing (T₂*), Hahn-echo coherence (T₂), and coherence under dynamical decoupling (DD-T₂) can differ by orders of magnitude on one physical qubit.

The problem: papers tend to quote numbers which look the best, then compare across platforms as if they're the same metric. That's where most bad benchmarking begins.

Ideally, we should say which sequence produced which number, because a coherence time without its method is just a nice-looking figure.

Honest benchmarking is a precondition for democratising quantum computing, a goal XeedQ shares.

[ QuantumComputing, NVCenter, DiamondQubits, XeedQ ]

28/08/2026

Why is it important to move early-stage quantum computers out of the lab?

Florian Frank, Operations Project Manager at XeedQ, shares his perspective.

[ xeedq, quantumcomputing, xq ]

27/08/2026

Technology becomes meaningful when people can put it to work!

The future of quantum computing will be shaped by what people discover when they can actually work with the machines.

With six XeedQ systems already operating across Germany, each system puts quantum hardware directly in the hands of researchers exploring new questions and applications.

Swipe through to see where XeedQ systems are already in use.

[ XeedQ, QuantumComputing, QuantumTechnology, DeepTech ]

24/08/2026

A quoted 99.9% gate fidelity is not automatically better than a quoted 99.3%.

Higher number wins, right? Only if both numbers came from the same protocol.

Randomised benchmarking, interleaved RB, and quantum process tomography measure different things under different error assumptions. A 99.9% RB result and a 99.3% QPT result are not directly comparable. They may describe hardware with similar underlying performance.

So, the useful question isn't "what's your fidelity?", it is "fidelity by which protocol?"

We must publish the protocol next to the number, so the comparison actually means something. Because you can't democratise a technology people aren't equipped to evaluate.

[ QuantumComputing, NVCenter, DiamondQubits, XeedQ ]

19/08/2026

XeedQ's quantum computers run at room temperature: 700W, using one wall socket, with the footprint of a filing cabinet, and boot in under five minutes.

The power requirement shouldn't be a barrier to accessing a quantum computer.

( quantumcomputing, deeptech, xeedq )

17/08/2026

XeedQ has delivered and operationalised six quantum computers across TU Dresden, Goethe University Frankfurt and the QCI – German Aerospace Center (DLR).

These are room-temperature quantum computers installed and operating on-site, available to researchers and students 24/7, including through remote access.

For nitrogen-vacancy diamond quantum computing, getting here means solving engineering challenges at the atomic scale, maintaining quantum coherence at room temperature, and building systems that operate reliably outside a specialist physics laboratory.

There are many roadmaps, qubit counts and announcements in quantum computing today. A working quantum computer in the field provides a different measure of technological maturity.

For XeedQ, the technology is real only when it ships. Ours has.

14/08/2026

How is XeedQ different?

Dr.Julian Rickert, Director of Research at XeedQ, shares his perspective.

13/08/2026

A diamond qubit starts with a single atomic defect, but that's only the beginning.

Where it's created, how it's controlled and how its signal is collected all matter.

Here's a closer look at the engineering behind it.

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