There is an agreement between The Technical University of Denmark (DTU) and University of Copenhagen (KU). According to this KU students can take a number of already approved courses at DTU. At present these courses are:

• Electronic structure methods in materials physics, chemistry and biology (10 ECTS)
• Quantum electronics: Physics and devices (10 ECTS)
• Theory of lab-on-a-chip systems (5 ECTS)
• Nanophotonics, physics and devices (10 ECTS)
• Modelling of Complex Biological Systems (5 ECTS)
• Nanosystems engineering (10 ECTS)

You can find the courses here.

There exist a similar list of KU courses, which are offered DTU students.

Please, note that the structure is different at DTU. E.g. all of the above courses last for 13 weeks, which is 2 blocks in the KU system.