Deutsche Telekom demonstrates quantum teleportation over 30 kilometers of commercial fiber optics in Berlin

Classification: Why this demonstration is strategically relevant

The news about quantum teleportation sounds spectacular, but is often misunderstood. It is not about transporting matter or people, but about transferring a quantum state (i.e., the information of a qubit) from one place to another. The process is based on entanglement and additional classical communication. The principle has been known in research since the 1990s; what is new and strategically relevant here is the step into a real telecommunications environment outside an isolated laboratory setting.

According to Deutsche Telekom's T-Labs and Qunnect, quantum teleportation was demonstrated in Berlin over approximately 30 kilometers of commercial fiber optics – coexisting with classical data traffic and with a reported average success rate or fidelity of around 90 percent. This combination of distance, infrastructure proximity, and operational environment shifts the debate away from the question of whether quantum networks are physically possible to the question of how they can be operated, monitored, and scaled as infrastructure components.

For SwissTech Briefing, this is primarily an infrastructure issue with security relevance. Once quantum networks move from the laboratory to operator environments, this will affect not only research, but also network operation, standards, supply chains, certification, and later procurement by government and critical operators. This is precisely where the Berlin demonstration comes in.

Strategic context

From theory (1993) to infrastructure question (2026)

The theoretical basis of quantum teleportation was described in 1993. In 1997, Anton Zeilinger's team provided early experimental proof that the principle could be put into practice. Since then, teleportation has been demonstrated in many configurations and over increasing distances. However, the difference to the current phase is crucial: in the past, the focus was on physical proof, whereas today the focus is on system integration into real networks.

This also changes the assessment. A single record value is less relevant than questions such as: Does it work on existing operator fiber optics? Does the quality remain stable over time? How does the system behave in a real network environment, with temperature drift and operational variability? Can this be monitored, automated, and translated into a carrier model? These questions are typical for the transition from research to infrastructure technology.

Why operator demos are strategically more important than pure lab results

A telecom operator test in a live environment has a different significance than an isolated laboratory experiment. Operators must integrate technologies into heterogeneous networks, existing processes, and security requirements. If T-Labs show that quantum teleportation can be demonstrated on commercial fiber optics in a Berlin environment in parallel with conventional Internet traffic, this is an indication of integration capability—not market readiness, but a relevant intermediate step.

This point is particularly important in Europe: competition will be decided not only by quantum processors, but also by network infrastructure, orchestration, and operability. Whoever controls this level will later control parts of the value chain surrounding quantum networking.

Core analysis: What T-Labs and Qunnect have demonstrated

The role of Qunnect's Carina platform

At the heart of the demonstration is Qunnect's Carina platform, which, according to the information provided, provides components for the distribution of entangled photons. The practical benefit is that the platform is geared toward a real network context and not just a highly controlled laboratory environment. This is crucial for operators because quantum signals are sensitive to interference, which is why stabilization, calibration, and reproducible quality over time play a central role.

In the setup described, entangled photon pairs are generated and distributed via fiber optics. The teleportation itself is based on pre-shared entanglement and a measurement operation, the result of which is additionally transmitted via a classical channel. This also makes it clear what this demonstration is not: it is not "instant communication" in the popular sense, but rather a quantum physics protocol that still requires classical infrastructure.

30 km of commercial fiber optics and coexistence with classical traffic

A particularly relevant aspect of the Berlin demonstration is the distance of around 30 km over commercial fiber optics. Even more important than the distance itself, however, is the fact that the demonstration took place in an environment where the fiber optic cable is also used for conventional communication. This coexistence is crucial from an operator's perspective, because later use is unlikely to be limited to dedicated "quantum-only" networks.

The demonstration thus addresses one of the most important hurdles for the next phase of quantum networking: How can quantum channels be integrated into existing metro networks without fundamentally restructuring classic operations? This is precisely where the potential economic leverage lies – and at the same time the operational complexity.

Classification of the reported 90 percent fidelity

The reported average fidelity of around 90 percent is a relevant technical indicator, but not an end point. In strategic terms, this value means that the system is powerful enough under realistic conditions to shift the discussion toward operation, scaling, and standards. For productive services, however, additional questions about availability, error correction paths, repeatability, monitoring, and service levels would be central.

The often-expressed expectation that further optimization could achieve "close to 100 percent" is plausible as a development direction, but it does not replace operational metrics. For infrastructure operators, it is not only peak performance that is important, but above all predictable performance over time, including dealing with drift, maintenance, and interoperability between components from different manufacturers.

Technical classification: 795 nm and pre-shared entanglement

The reports on the demonstration refer to a teleportation wavelength of 795 nm and "pre-shared entanglement." These details are not merely academic. They show that the demonstration fits into a broader development direction in which networks not only transport data, but also provide states, clock information, and later potentially resources for distributed quantum applications. The specific technical design will depend heavily on interoperability and standardization in the future.

European implications

From research programs to operational capability

Europe has strong research capabilities in quantum physics and quantum technologies, but strategic competition is increasingly shifting to infrastructure expertise: Who can integrate quantum functions into real-world telecommunications and data center environments? Who supplies the hardware? Who controls the network software and the orchestration model? The Berlin demonstration is therefore not just a PR announcement, but an indication of the next level of competition.

In the context of European initiatives such as EuroQCI and national quantum programs, an operator use case strengthens the argument for practical pilot networks. At the same time, there is a risk of new dependencies if critical components – from photonics to control to network software – are concentrated in a few non-European stacks. Europe will therefore have to distinguish more clearly between research funding and industrial policy architecture.

Standardization, certification, and security by design

With the shift to real operator environments, standardization is becoming a strategic issue. Without interoperable interfaces, there is a risk of proprietary islands. This would be problematic for defense, government, and critical infrastructure contexts because it would complicate procurement, auditability, and security certification.

A security-by-design approach is equally important. Quantum networks are often viewed solely from the perspective of "greater security." In practice, however, new areas of vulnerability arise: calibration manipulation, side channels, supply chain risks for hardware, and software vulnerabilities in the orchestration and monitoring layers. The strategic question is therefore not only whether quantum networks enable more secure properties, but also how their operating environment can be secured.

Signal effect through parallel developments in the US

The fact that Cisco and Qunnect have also recently announced a metro-scale quantum network demonstration on existing fiber optics in New York underscores an international dynamic: quantum networking is evolving from a research topic to a telecommunications and infrastructure discipline. For Europe, this means that market structure, standards, and reference architectures will be shaped in the coming years – not just in the distant future.

Relevance for Switzerland

Quantum-safe transition remains a must – quantum networking becomes a strategic option

For Switzerland, the transition to post-quantum cryptography (PQC) remains a priority in the short term. This transition is necessary regardless of how quickly quantum networks become operational. However, the demonstration in Berlin shows that a second strategic line is emerging in parallel: quantum networks as a possible supplement for highly secure communication, verification mechanisms, and later specialized applications in critical sectors.

This is relevant for financial market infrastructure, energy, healthcare, and government agencies because Switzerland is heavily dependent on reliable, secure, and auditable digital infrastructure. Early pilot expertise can be an advantage here – not necessarily through immediate large-scale investments, but through targeted test fields, governance models, and procurement knowledge.

Industry and research location: where Switzerland has leverage

With ecosystems linked to ETH/EPFL, the photonics and precision industries, and strong security and engineering expertise, Switzerland has the potential to be more than just an end user of quantum networking. Roles in photonics components, precision measurement technology, timing, security engineering, and testing/validation environments are particularly realistic. For a small country, this is often more effective strategically than attempting to cover the entire stack depth on its own.

Switzerland's telecommunications and data center landscape could also benefit from early pilot projects. The added value would lie less in short-term commercialization than in operational learning curves: What requirements arise during operation? What security and compliance issues arise? Which interfaces and standards are relevant for later procurement?

Outlook for 2027–2028: From demonstrator to first operator pilots

For the years 2027–2028, it is realistic to expect a shift in focus from individual teleportation demos to multi-node quantum network pilots. This will include more robust entanglement distribution, entanglement swapping across multiple nodes, better automatic stabilization, and coupling to specific applications (e.g., key management, distributed quantum computing resources, or timing/sensor networks).

The economic and geopolitical leverage will then arise not primarily from the buzzword "teleportation," but from the question of which players define the operational architecture: hardware suppliers, network equipment providers, carriers, software orchestration, and certification regimes. Those who anchor these building blocks early on in reference projects will later gain influence over standards and procurement decisions.

For Switzerland, this results in a sober dual strategy: consistently implementing PQC migration while simultaneously building quantum networking expertise through targeted pilots and partnerships. The demonstration in Berlin by Deutsche Telekom and Qunnect is not an end point, but a clear signal that the field is gradually moving from the laboratory toward operator reality.