Quantum technologies

Quantum computers are based on the principles of quantum mechanics and use qubits instead of bits. This gives them the potential to solve complex problems much faster than conventional computers. Quantum computing is a central research focus at TUM, ranging from basic research to the development of quantum hardware and software.

We research new algorithms, methods and technologies, and we also implement pioneering projects in application areas such as encryption methods (cryptography), quantum simulation and machine learning - both in cooperation with other research institutions, universities and companies and through internal research initiatives.

We are developing and testing quantum communication networks that enable quantum information to be transmitted securely between remote locations. In the future, such networks could be used for tap-proof communication and quantum technologies such as quantum internet and quantum cloud computing. This also includes research into satellites for quantum communication.

In this area, measuring instruments are being developed at our university that use quantum properties, quantum mechanical states or quantum systems. They are very sensitive because quantum states react easily to external disturbances and they offer good spatial resolution because they are typically very small. They can be based on light, mechanical vibrational quanta or magnetic quanta - so-called spins. Their fields of application lie in materials science, medical diagnostics, particle physics or the investigation of the subsurface in construction projects.

Quantum materials have completely new properties that are the result of quantum fluctuations, quantum entanglement, quantum coherence and the topology of quantum mechanical wave functions. Important examples are topological materials, superconductors and quantum spin liquids.

We investigate whether topological materials could be the basis for a new generation of energy-efficient electronics and whether superconducting materials are suitable for energy generation, storage and transmission. In quantum spin liquids, the spins of the electrons become entangled so that they cannot form a statically ordered state. Here we explore if energetic defects in these quantum-fluctuating materials could be the basis for revolutionary forms of information storage and processing.

Our research contributes to expanding and questioning established theories in the field of quantum science. One research focus is to theoretically understand which relevant tasks can be efficiently solved by a quantum computer. As a concrete demonstration, a TUM research team together with Google Quantum AI has developed new methods to simulate the properties of exotic phases of matter on quantum computers.

Our scientists are also researching possible social, ethical, societal and political challenges that may be associated with advances in quantum technology. These include the disclosure of trade or state secrets, the retooling of companies or accelerated AI development through faster computing power. The aim is to identify opportunities and risks and use established methods to solve any problems that arise and monitor developments. Young scientists are also trained in the responsible use of quantum technologies.