In this project we aim at the realization of a quantum hybrid system. Research on quantum hybrid systems strives to combine the benefits of different quantum objects into a new entity that is more useful than each of the systems by itself. That includes properties like storage of quantum states, ability to sense very small forces, fast gate times in quantum computational application and many more. In our experiment we couple an ensemble of cold or ultracold atoms to a cryogenic nano-mechanical oscillator via light. Our ultimate goal is the coherent coupling of two macroscopic quantum objects namely the Bose-Einstein condensate and the ground state nano mechanical oscillator, in our case a SiN membrane. In first experiments we want to evaluate and compare different methods of cooling the high quality nano-mechanical oscillator to its absolute quantum mechanical ground state by established means of laser cooling on the one hand and by indirect cooling via a coupling to cold and ultracold atoms using different coupling methods.
Mathematics, Informatics and Natural Sciences
Prof. Dr. Roland Wiesendanger, Prof. Dr. Klaus Sengstock, Dr. Christoph Becker, Dr. Alexander Schwarz
E-Mail: wiesendanger"AT"physnet.uni-hamburg.de, sengstock"AT"physik.uni-hamburg.de, cbecker"AT"physik.uni-hamburg.de, aschwarz"AT"physik.uni-hamburg.de