An optoelectronic light source that generates individual photons on demand in the telecommunications C-band of Deutsche Telekom $DTE (-0.74%) with record quality has an interference visibility of 92 percent. This is an important step towards scalable photonic quantum computing and quantum communication.

A research team from the University of Stuttgart and the Julius-Maximilians-Universität Würzburg led by Prof. Stefanie Barz (University of Stuttgart) has realized an optoelectronic light source that generates single photons in the C-band (1,550 nm), which is critical for telecommunications, with record quality and deterministically. With a two-photon interference visibility of almost 92 percent, the quantum dot device achieves values that are competitive with probabilistic systems for the first time, while at the same time operating deterministically.

"The lack of a high-quality C-band photon source that operates deterministically has been a key problem in quantum optics laboratories for over a decade. Our new technology now removes this obstacle," explains Prof. Stefanie Barz. This means access to synchronizable photon sources for the telecommunications band for the first time.

Unlike conventional probabilistic methods such as spontaneous parametric down-conversion (SPDC), the new quantum dot-based source generates photons exactly when it is electronically controlled. This property is essential for the synchronization of multiple photon sources in complex optoelectronic systems.

The high indistinguishability of the generated photons is a critical parameter for quantum interference applications and enables precise control over interference effects. These controlled quantum effects are a prerequisite for advanced applications in quantum computing and quantum communication.

A research team from the University of Stuttgart and the Julius-Maximilians-Universität Würzburg led by Prof. Stefanie Barz (University of Stuttgart) has realized an optoelectronic light source that generates single photons in the C-band (1,550 nm), which is critical for telecommunications, with record quality and deterministically. With a two-photon interference visibility of almost 92 percent, the quantum dot device achieves values that are competitive with probabilistic systems for the first time, while at the same time operating deterministically.

"The lack of a high-quality C-band photon source that operates deterministically has been a key problem in quantum optics laboratories for over a decade. Our new technology now removes this obstacle," explains Prof. Stefanie Barz. This means access to synchronizable photon sources for the telecommunications band for the first time.

》Deterministic photon generation《

Unlike conventional probabilistic methods such as spontaneous parametric down-conversion (SPDC), the new quantum dot-based source generates photons exactly when it is electronically controlled. This property is essential for the synchronization of multiple photon sources in complex optoelectronic systems.

The high indistinguishability of the generated photons is a critical parameter for quantum interference applications and enables precise control over interference effects. These controlled quantum effects are a prerequisite for advanced applications in quantum computing and quantum communication.

》Integration in telecommunications infrastructure《

Compatibility with existing fiber optic infrastructure is crucial for the industrial implementation of photonic quantum technologies. The telecommunications C-band around 1,550 nm offers minimal optical losses in standard single-mode fibers and is therefore the industrial standard for long-distance data transmission.

Previous quantum dot photon sources achieved their best properties at shorter wavelengths of 780 to 960 nm, while C-band implementations achieved at best 72 percent interference visibility. This is well below the requirements of demanding quantum applications.

The developed device is based on indium arsenide quantum dots in an indium aluminum gallium arsenide matrix, integrated into a circular Bragg grating resonator to amplify the photon emission.

Verizon Wireless $VZ (-1.94%) on Wednesday sued T-Mobile $TMUS (-2.09%)
$DTE (-0.74%) accusing its largest competitor of false advertising and causing irreparable harm by promising consumers annual savings of more than $1,000 if they switch wireless carriers.

According to a lawsuit filed in federal court in Manhattan, T-Mobile exaggerated the alleged savings by more than 100 percent in some cases by comparing its promotional prices to Verizon's standard prices and inflating the value of streaming, satellite connectivity and other benefits that "the other providers do not offer."

Verizon also said T-Mobile doubled down on its savings promises, which were "substantially identical" to promises that the National Advertising Review Board, which oversees the U.S. advertising industry's self-regulatory system, found to be unsubstantiated and misleading in 2025 and 2026.

The alleged deception is that no direct comparisons of subscriber costs are offered by understating the savings offered by New York-based Verizon when bundling various services such as Netflix with HBO Max or Hulu with Disney+ and ESPN+.

Deutsche Telekom $DTE (-0.74%) and the leading AI chip manufacturer Nvidia are $NVDA (+7.16%) are investing billions in Munich. What is behind the plans for the huge AI data center in the English Garden?

Deutsche Telekom wants to enter into the construction and operation of data centers for artificial intelligence (AI) on a grand scale. Group CEO Timotheus Höttges announced the launch of a joint project with the US chip company Nvidia in Munich last November.

Three months later, the time has come. Together with Vice Chancellor Lars Klingbeil (SPD) and Bavaria's Minister President Markus Söder (CSU), the Deutsche Telekom CEO will open the new AI data center.

》How much money is Deutsche Telekom investing in the project?

The cloud data center for artificial intelligence requires an investment of around one billion euros. This will involve the purchase of 10,000 graphics processors from Nvidia.

This puts Deutsche Telekom in the top league of data centers in Germany.

For comparison: Germany's largest supercomputer, Jupiter, which is located at the research center in Jülich, has 24,000 graphics processors.

》Why did only three months pass before the launch?

Telekom is not building on a greenfield site, but is moving into a completely renovated existing data center in Munich, which was previously operated by Hypovereinsbank.

Little can be seen from the outside, as the data center extends over six underground floors. The building is part of the Tucherpark office quarter, which was built in the 1960s directly on the edge of the English Garden.

》What happens to the heat《

It's true: AI chips, especially Nvidia's Blackwell GPUs, get extremely hot. Telekom will use the cold water from the adjacent ice stream for cooling.

The waste heat generated in the data center will not simply be directed into the stream water. There are plans to feed this energy into the local district heating network to heat the surrounding neighborhood in Tucherpark.

》Why Telekom chose the Munich site《

Munich was chosen because it has a high density of potential industrial customers. Telekom customers and partners such as Airbus $AIR (+1.06%)BMW $BMW (-0.11%)the AI company Perplexity and Siemens $SIE (+2.47%)as well as a number of robotics start-ups such as Agile Robots require low data runtimes (latency) for their applications. By placing the computers in the middle of the city - and not in a remote business park - Telekom can meet the companies' requirements.

》Isn't the competition with large US providers like a battle between David and Goliath?

At first glance, the market position of US giants such as AWS (Amazon) $AMZN (+1.95%), Azure (Microsoft) $MSFT (+1.51%) or Google Cloud $GOOGL (-1.62%) overwhelming.

The large US companies invest many times more each year than Deutsche Telekom can afford.

Nevertheless, Deutsche Telekom still has a chance in the competition and this is due to the fact that the Bonn-based company has chosen a lucrative niche in the cloud business, namely the provision of high-security data centers close to industrial companies.

》Does Telekom benefit from Germany as a business location?

Yes and no. On the one hand, Telekom has to live with higher costs in Germany - especially for the energy supply. On the other hand, it can turn the keyword "data sovereignty" into a business model.

Many German companies are reluctant to store their sensitive data in the clouds of US providers.

Deutsche Telekom offers a "sovereign cloud" in which the data remains physically in Germany and is subject to European and German law. US providers, on the other hand, have the option of access by US authorities, at least in theory, due to laws such as the US Cloud Act.

Viasat $VSAT (+10.47%)a global leader in satellite communications, announced the addition of Serbia to its award-winning European Aviation Network (EAN).

This network expansion, realized in cooperation with Deutsche Telekom $DTE (-0.74%) improves in-flight connectivity (IFC) for airlines and passengers flying through Serbian airspace on EAN-equipped aircraft.

The expanded coverage is made possible by the commissioning of new ground stations that will improve connectivity services on flights across the region, including flights to and from the Balkans, as well as from Germany and Western Europe to Greece and other routes.

IFC offerings across Europe continue to evolve, and while airlines are increasingly turning to "freemium" and "full and free" offerings, EAN's scalability continues to provide a superior passenger experience that supports a variety of business models and offers maximum flexibility to airlines.

EAN is the world's first and only connectivity solution to integrate S-band satellite coverage with a complementary Ground Component (CGC) network. EAN, part of Viasat's global aviation portfolio, is specifically designed to address the challenges of congested European airspace and frequent flight maneuvers, providing a seamless, low-latency broadband experience that meets expectations on the ground.

Deutsche Telekom is significantly expanding its T Cloud Private to counter the market dominance of the major US cloud providers. This is intended to strengthen Europe's digital sovereignty.

The US hyperscalers such as Amazon Web Services (AWS) $AMZN (+1.95%)Microsoft Azure $MSFT (+1.51%) or Google Cloud Platform (GCP) $GOOGL (-1.62%) dominate the cloud market for companies in Europe. However, Europe wants to become more independent of the tech giants from overseas and is focusing on greater digital sovereignty.

Deutsche Telekom $DTE (-0.74%) has now announced that it will be expanding its T Cloud Private this year.

The project aims to significantly reduce the feature gap with US providers for central core features by the end of 2026 and provide a scalable infrastructure and specialized AI services at a competitive level.

"We are ending the era of either-or decisions," says Ferri Abolhassan, CEO of T-Systems and member of the Board of Management of Deutsche Telekom AG. "Until now, companies have had to choose between maximum functionality from overseas or European sovereignty. With T Cloud Public, we now deliver the best of both worlds. We are not only building a sovereign cloud, but also the digital foundation for a competitive, free Europe."

The T Cloud Public can be seamlessly combined with the Industrial AI Cloud and is designed to enable accelerated AI applications using the latest generation of GPUs.

It offers companies a ready-to-use toolkit for their IT infrastructures: computing power, storage, managed databases and preconfigured developer tools are available at the click of a mouse.

A key advantage is direct access to scarce GPU resources via the seamlessly combinable Industrial AI Cloud. This allows computationally intensive AI applications to be implemented without having to operate their own server hardware. The modular architecture allows users to select exactly the services they need, from basic network infrastructure to complete AI pipelines.

In line with the security by design approach, the platform is certified according to standards such as C5 and is based on a modern zero-trust architecture. Deutsche Telekom enables fully EU-compliant data processing in European data centers that are strictly protected against access from third countries.

This promise goes far beyond pure software security:

Customers thus receive comprehensive legal and operational sovereignty in accordance with European law and European standards.

Salvete, investors!

My name is Automatix - the name says it all.

Like my namesake from the Gallic village, I prefer to focus on craftsmanship, substance and consistency rather than magic potions or short-term success.

I'm 37 (turning 38 this year) and have only been actively investing in the capital market since the end of 2024 - a pretty bumpy journey so far

But my goal has now become clear to me:

long-term wealth accumulation with a focus on dividends.

I am aware that it is ambitious - perhaps even unrealistic - to live entirely from dividends one day.

But it is precisely this idea that drives me, not my promise.

Professionally, I have been working full-time for a large German tech company for 15 years.

Here I have worked my way up from the very bottom - call center supporter to key account manager to my current position as senior project manager - so structured work, long-term thinking and risk assessment are part of my everyday life.

At the same time, I run a family farm as a sideline

• approx. 80% horse boarding (yes, I also ride 🏇)
• approx. 20 % forestry business

This combination of technology, project work and real economic substance also characterizes my investment approach.

Before I became intensively involved with shares, my first major investments were in real assets:

• two apartments (already paid off & rented out)
• a plot of land (financed by rental income) on which one or two apartment buildings are to be built for rent in the future

For me, shares are therefore not a substitute, but a supplement to existing tangible assets.

I invest at least €750 per month, usually more, and focus on:

• 🌍 global ETFs $VWRL (+1.77%) & $TDIV (+1.64%) as a stable foundation
• 🏗️ Individual stocks, deliberately selected, with a focus on Germany & Europe

For individual stocks, I prefer healthy, growing companies.

I prefer dividend growth to high initial yields without substance.

The core of my portfolio will be $SIE (+2.47%) supplemented by stocks such as

$ALV (+1.2%) , $DTE (-0.74%) , $SAP (+2.64%) , $MUV2 (+0.95%) and $DB1 (+1.06%) .

Each position is built up gradually - first €500, then €1,000, and significantly more in the long term.

No more hectic reallocations, no more chasing - just buy and hold!

I was a silent reader here for a long time, but would like to share my thoughts, decisions and learnings in the future - objectively & long-term (if there is interest)

No trading, no noise -

but patience, discipline and a stable anvil 🛠️

I am looking forward to your feedback - constructive criticism is always welcome.

Here's to a good exchange!

#newpost
#firststep
#vorstellung

Akamai $AKAM (+3.19%) announced that Deutsche Telekom Security $DTE (-0.74%)a member of the Akamai Partner Connect program, is leveraging Akamai's Security Certified Service Provider initiative to provide cybersecurity services to its customers in key industries such as financial services, insurance, critical infrastructure and the public sector.

Using Akamai's Security Certified Service capabilities, Deutsche Telekom Security now offers proactive Day 2 operational services that provide customers with continuous end-to-end management across the entire API security lifecycle.

These services include comprehensive operational and management capabilities such as hybrid deployments, quarterly business reviews, and API audits and compliance. They also include professional security incident management and proactive API security testing.

In addition, Deutsche Telekom Security extends its support to Akamai Guardicore Segmentation environments, offering specialized services such as segmentation management, security incident management, and audits and compliance. All of these services can be run in a sovereign cloud.

"We are achieving great results with Akamai's advanced Security Certified Service Provider programs," said Christian Günther, Head of Sales Major Accounts at Deutsche Telekom Security. "As an early adopter, we offer our customers even better API security and support for software-defined segmentation. This enables them to remain secure and compliant in a dynamic cybersecurity landscape that is becoming increasingly complex."

The enhancements to Akamai's Security Certified Service Provider programs are in response to the growing need for robust API security and micro-segmentation solutions, particularly in industries that are heavily impacted by cyberthreats.

A 2025 State of the Internet (SOTI) report from Akamai found that the number of recorded API attacks increased to 150 billion between January 2023 and December 2024. The attacks can lead to significant financial losses, data breaches and reputational damage, highlighting the importance of securing APIs and implementing micro-segmentation strategies.

Under the heading of "defense business", the management of Deutsche Telekom is $DTE (-0.74%) is considering new roles and offerings that go beyond traditional telecoms products.

This emerges from statements made by Telekom to "Wirtschaftswoche".

With regard to the new initiative, it states that Deutsche Telekom sees itself as a "digital infrastructure provider" with a responsibility to "contribute to the protection of Germany - especially in times of hybrid threats".

However, there are currently no plans for an independent "defense division" within the Group; instead, the defense industry is to be supported on a project-by-project basis and draw on existing expertise within the Group. The initiative is, however, to be handled by T-Systems.

》Manager with Bundeswehr background heads department with flexible size《

Deutsche Telekom's defense project is to be coordinated internally by a manager with a Bundeswehr background, which emphasizes the strategic focus and proximity to the defense sector: Lieutenant Colonel Philip Stockmann, who was previously responsible for tariff and product integration in the mobile communications business, is heading the initiative. Around 16 employees are initially assigned directly to him, as Wirtschaftswoche writes, citing internal sources. Depending on the task at hand, however, up to one hundred experts from specialist departments will be involved in order to develop project-related solutions. "The number of employees varies depending on the task," Telekom told Wirtschaftswoche, "unfortunately we cannot provide any concrete details."

》Technology offering between cybersecurity and critical infrastructure《

According to Wirtschaftswoche, Deutsche Telekom's planned offering will provide industry-specific solutions for the defense sector - just as the Group's systems business already does for other industries. As a spokesperson told the news site, the company now also sees growth potential here, alongside healthcare and the public sector. This may also be due to the billions in special funds provided by the German government for the expansion of defense capacities.

Observers assume that the Group will not only offer traditional communication services, but also hosting-capable cloud infrastructures, protected communication systems and cyber security solutions, as already offered in other industries and the public sector. Although Telekom has not published any detailed information on this for security and confidentiality reasons, the alignment of T-Systems and Telekom Security points to a comprehensive technological foundation that could also be relevant for highly sensitive data and critical processes.

》Opportunities and criticism - At the crossroads between business and security《

For Telekom, the commitment to the defence sector opens up a potentially new market segment in an environment in which government spending on digitalization and secure communication is increasing. At the same time, this strategic step is not free of political and social debate: the role of a formerly civilian-oriented telecommunications company in the context of military procurement raises questions about ethical responsibility, differentiation from arms companies and the balance between the pursuit of economic profit and state security interests. However, a broad public debate has yet to take place.