IQM and Deutsche Bahn Demonstrate Quantum Algorithm for Railway Scheduling on Real Operational Data

MUNICH--(BUSINESS WIRE)--Jul 20, 2026--

IQM Quantum Computers (Nasdaq: IQMX), a global leader in full-stack superconducting quantum computers, today published the results of a research collaboration with Deutsche Bahn, Europe’s largest rail operator, exploring how quantum computing can improve railway scheduling.

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Using a real operational dataset from Deutsche Bahn, a schedule of 190 trips across five German cities translating into roughly 98,500 possible cycles, the two organizations developed and tested a hybrid quantum-classical algorithm designed for enterprise-scale optimization problems.

As detailed in a published whitepaper here, the IQM team applied the Quantum Approximate Optimization Algorithm (QAOA) in manageable stages, with the quantum component solving smaller subproblems within a classical framework that manages the problem at full scale. The architecture is built to generalize: the same approach can be applied to comparable optimization challenges in logistics, energy, manufacturing and other sectors.

Three results stand out:

It works on today’s hardware. The approach delivered feasible, good-quality solutions without requiring hardware that does not yet exist. Enterprises can adopt this model now rather than waiting for fault-tolerant systems.

It improves automatically as hardware improves. Testing showed a statistically significant relationship between the size of the subproblem the quantum component could handle and the quality of the solution. As quantum processors scale, the same framework is expected to deliver better outcomes without redesign.

It ran end to end on IQM hardware. The full pipeline was executed on an IQM quantum computer, from problem formulation through to a usable result, establishing a baseline that enterprises and partners can build on.

“This collaboration shows that quantum computing is already capable of tackling the kind of large-scale, real-world optimization problems enterprises face every day,” said Dr. Inés de Vega, Chief Scientist of IQM Quantum Computers. "Working with Deutsche Bahn on a problem of this complexity gives us a clear blueprint for how quantum computing delivers value now, while scaling naturally as hardware improves."

“Quantum computing is not going away. By tackling a real-world problem in a hybrid HPC and quantum computing environment, we have taken another step toward quantum advantage,” said Manfred Rieck, Head of Quantum Technology at Deutsche Bahn.

This collaboration focused on planning under known, stable conditions. Many enterprises face a faster-moving version of the same challenge: responding to disruptions in real time, on timescales of minutes rather than hours. The researchers note that the same hybrid architecture could, in principle, be adapted to this more time-sensitive class of problem as quantum hardware improves, extending the approach further into operational decision-making.

The collaboration reflects IQM’s focus on enterprise adoption of quantum computing through systems that customers own, operate and build on.

About IQM Quantum Computers

IQM Quantum Computers (Nasdaq: IQMX) is a global leader in superconducting quantum computers, delivering full-stack quantum systems and cloud platform access to enterprises, research institutions, universities, high-performance computing centers and national laboratories worldwide. IQM's on-premises deployment model gives customers direct ownership and control of their quantum infrastructure. Founded in 2018 and headquartered in Finland, with major operations in Munich, IQM employs over 400 people and operates across Europe, Asia and North America. IQM is the first publicly listed European quantum company on the Nasdaq Stock Market.

About Deutsche Bahn

Deutsche Bahn AG is one of the world's largest transport and logistics companies, headquartered in Berlin. With around 230,000 employees and operations in more than 130 countries, DB is Germany's primary rail operator for both passengers and freight. DB Systel GmbH, its technology subsidiary, is responsible for the group's digital and IT infrastructure, including the operational decision-support systems used across the network.

IQM's whitepaper on hybrid quantum optimization for railway scheduling, developed with Deutsche Bahn.

GEORGETOWN, Guyana (AP) — Rescuers in Guyana searched for survivors Monday as authorities launched an investigation after a ferry believed to have been overloaded capsized over the weekend. The government said at least 32 of the 67 people rescued were not listed on the passenger manifest.

Hopes of finding more survivors faded as Prime Minister Mark Phillips told reporters late Sunday that officials believe there were many more passengers than the documented 116 and 17 crew members aboard the decades-old ferry.

Passengers have complained for years that ticket clerks unofficially sell seats to friends and associates for cash without adding their names to the manifest, a practice that has persisted for decades at state-run ferry terminals.

Phillips also said the rescued captain and at least one other crew member tested positive for marijuana and remain in police custody as part of the criminal investigation.

The MV Barima capsized off the Essequibo coast late Saturday while en route from the capital, Georgetown, to Port Kaituma in northwestern Guyana, near Venezuela. Only 10 bodies had been recovered by Monday.

The prime minister said the government launched an urgent and comprehensive probe, concentrating on the accuracy of the manifest, cargo loading, compliance with safety rules and the conduct of the captain and crew before sailing, among other issues.

“Let me be absolutely clear: Where negligence, misconduct or criminal wrongdoing is established, those responsible will face the full force of the law,” he said. “There will be no exceptions and no tolerance for actions that placed innocent lives at risk.”

President Irfaan Ali traveled to the northern town of Mabaruma to meet with survivors, those who remain hospitalized and families.

"It was a deeply emotional experience. I listened to their stories, shared in their pain and anxiety, and assured them that every practical measure would be taken to provide the support and assistance they need,” he said.

Like other cabinet ministers, Ali promised a full and thorough probe into the capsizing: “Our priority remains to protect every life that can still be saved; to support those who have endured unimaginable trauma."

Public Works Minister Juan Edghill said he was devastated by what he described as the country’s worst marine disaster in decades and by the latest developments in the investigation.

“We have a zero tolerance for members of the crew drinking or smoking while at work. And for us to have positive tests from the captain, this is serious,” he said.

Edghill acknowledged that officials don’t know how many people were aboard the ferry because the manifest list is not accurate, calling that “a criminal action.”

Boats and ferries are commonly used across Guyana, a heavily forested country with scant road systems in its interior. Many people choose ferries because cargo rates are lower than air freight charged by domestic airlines serving those areas.

Several passengers said on social media that water had been seeping into the cargo area as the MV Barima limped along the North Atlantic coast on its now ill-fated voyage to Port Kaituma.

The vessel, built more than 80 years ago, was last dry docked for major repairs in 2024 and was due for additional major repairs in October.

FILE - People sit on the seawall as the sun sets in Georgetown, Guyana, Tuesday, Nov. 19, 2024. (AP Photo/Matias Delacroix, File)