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Quantum research in two ways: From proving someone’s location to simulating financial markets

Quantum physics may sound abstract, but Ph.D. candidates Kirsten Kanneworff and David Dechant show that quantum research can also be very concrete. Together, they are investigating how quantum technology can change the world. While Kanneworff worked in the lab to study how quantum optics can be used to prove someone’s location, Dechant focused on quantum computing for dynamic systems, such as the financial world. The two researchers are defending their doctoral theses this week.

Imagine that you receive an email from someone posing as your bank, asking you to enter your personal details on a website. How can you verify the sender’s identity?

Kanneworff investigated a smart way to check whether someone is really in a certain place: quantum position verification. “The idea for this project came about during my master’s degree,” she says. “I found it an interesting subject. The combination of optics and quantum communication really appealed to me, especially since it has a clear application.”

IceCube upgrade adds six deep sensor strings to detect lower-energy neutrinos

Since 2010, the IceCube Observatory at the Amundsen-Scott South Pole Station has been delivering groundbreaking measurements of high-energy cosmic neutrinos. It consists of many detectors embedded in a volume of Antarctic ice measuring approximately one cubic kilometer. IceCube has now been upgraded with new optical modules to enable it to measure lower-energy neutrinos as well. Researchers at the Karlsruhe Institute of Technology (KIT) made a significant contribution to this expansion.

IceCube serves to measure high-energy neutrinos in an ice volume of one cubic kilometer. As neutrinos themselves do not emit any signals, the tracks of muons and other secondary particles are measured precisely. Muons are elementary particles sometimes produced by the interaction of neutrinos with ice. Contrary to neutrinos, muons carry an electric charge. On their way through the ice, they produce a characteristic light cone, which is detected by highly sensitive detectors.

Now, 51 researchers from around the world have installed six new strings of novel sensors up to 2,400 meters deep into the eternal ice, thereby expanding the IceCube experiment to also measure low-energy neutrinos.

A New Way To Cool Quantum Computers Could Change How They’re Built

By using controlled microwave noise, researchers created a quantum refrigerator capable of operating as a cooler, heat engine, or amplifier. This approach offers a new way to manage heat directly inside quantum circuits. Quantum technology has the potential to reshape many core areas of society.

Scientists Just Uncovered How Menopause Rewires the Brain

Menopause reshapes the brain in surprising ways — but it may also reveal the brain’s remarkable ability to adapt.

During menopause, many women notice episodes of “brain fog,” which can include forgetfulness, difficulty focusing, and persistent mental tiredness. These challenges are often linked to shifting hormone levels. To better understand what is happening in the brain during this life stage, researchers reviewed previously published studies examining how structural brain changes relate to cognitive, emotional, and physical health outcomes. Their findings were presented at the 2025 Annual Meeting of The Menopause Society.

Structural Brain Changes During Menopause.

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