Master student projects – University of Copenhagen

Ultracold Atoms > Research > Master student projects

Master student projects

Interested in doing your masters project in the area of Atomic, Molecular and Optical (AMO) physics? In the "precision measurements with ultracold atoms"-group we have several available Masters projects. We are looking for driven and ambitious master students to do these projects in close collaboration with Ph.D.-students.

The group has research projects within optical atomic, and molecular clocks, as well as Cavity Quantum Electrodynamics (CQED) and optical frequency-combs in Silica waveguides.


Molecular clocks (2-3 projects)

In collaboration with the European Space Agency and as part of the Qbiz-center at NBI and the SPOC center of excellence at DTU, we seek to improve small, compact and robust molecular clocks. The main goal is to create ultra-precise clocks that may be used in future missions as well as in technological applications such as high speed optical communication and large network synchronization. In these projects we employ molecules such as iodine (I2) or acetylene (C2H2) placed inside optical cavities. Our group has recently demonstrated a technique that greatly enhances the stability of optical clocks by combining atoms and optical cavities. We are developing this method further and wish to apply it to molecular samples. The projects are experimental and will involve optics, quantum optics, physics of molecules, laser physics, measurement and control.  

  • Iodine clock
  • Acetylene Clock
  • Optical frequency Comb

For further information on these projects please contact

Ultracold Strontium expreiments (2-3 projects)

In collaboration with the European Space Agency and as part of an EU-wide collaboration on atomic clocks, we seek to generate frequency stable laser sources. The main goal is to establish an ultra-stable reference laser, a so-called local oscillator, which may be employed in state-of-the-art optical atomic clocks.

We follow several different approaches to this end, and currently have two active experiments using cold strontium atoms. In both experiments we have the possibility of following a strategy with the atoms acting as passive or active components in obtaining the narrow spectral features we are after.

The passive approach uses the atoms inside an optical cavity as a frequency discriminator, whereas the active approach uses the quatization of the atoms and coupling field to achieve so-called superradiant lasing. In superradiance a large group of excited atoms placed closely together may phase lock and give of a burst of light on time scales significantly below the natural life time of the excited state. This phenomenon may be enhanced by placing the atoms in a high finesse cavity and may lead to exceedingly narrow frequency references. Furthermore, rather than being a single burst of photons, we contemplate to generate a continuous superradiance by employing a beam of atoms. The project is experimental and will involve fundamental quantum physics, optics, quantum optics, atomic physics, laser physics, measurement and control.

  • Superradiant laser
  • Continuous superradiant laser
  • μK cooling of Strontium atoms

For further information on these projects please contact

Please contact Jan W. Thomsen at if you are interested in doing a project with us, or want to hear more about them.