University of Vienna

Description of the Institution

The University of Vienna was founded in 1365 and is one of the largest Universities in Central Europe. A strong focus on research, combining fundamental with application-oriented research, renders this University highly attractive for the sharpest minds. Furthermore, the University’s goal is to create and sustain top-quality research and teaching, which are regarded as one inseparable entity.  It is associated with 15 Nobel Prize winners and has been the academic home of a large number of figures of both historical and academic importance. Currently, about 94,000 students are enrolled at the University of Vienna. The University of Vienna is a world-class university with extensive experience in managing externally funded projects.

The quantum research at the University of Vienna is covered by 7 workgroups with more than 90 academic researchers. The strong ties with other institutions such as the Atominstitut at the TU Wien and the Austrian Academy of Sciences’ Institute for Quantum Optics and Quantum Information provide a unique scientific environment.


Description of Main Tasks and Participant’s Profile

The main task of the UVIE is the development and setup of a narrow-bandwidth multi-photon source whose emitted photons are suitable for efficient couplings to atomic transitions. This allows for scalable hybrid atom-photon quantum technology that combines the advantages of optical and atomic quantum systems. The UVIE group has a recognized expertise in the generation of tailored multi-photon states for various applications. Based on this knowledge, UVIE builds and later will provide a portable narrow-band cavity-enhanced spontaneous parametric down-conversion source that is locked to the atomic transition of Rubidium. By exploiting the spontaneous characteristic of this source, the emission of two photon-pairs will be used to generate four-photon states of which each photon’s linewidth is about 10 MHz. Such novel narrow-bandwidth multi-photon states allow for the heralded preparation of two-photon states, including Bell states, as input states for atomic quantum systems. Thus, this source represents an essential part of this research program. Besides that, there is a strong exchange with the UROS group for optimizing the coupling from the source to the integrated waveguide structures.

Leading Researchers 

  • Prof. Dr. Philip Walther
    Principal Investigator

    PhotoCredit: ErBeStA / Sebastian Pucher