Cell experiment: Quantum teleportation, quantum memory, entanglement and measurements beyond the standard quantum limit with ensembles of room-temperature Cesium atoms.

Quantop research: Cell experiment

 Nanofiber experiment: In the Nanofiber group we use measurements at the quantum level to prepare interesting quantum states in ensembles of laser cooled atoms.

Quantop research: Nanofiber experiment

 Quantop research: We run experiments where quantum light is used to perform tasks in quantum sensing and quantum communication.

Quantop research at the Niels Bohr Institute

 Quantum membranes: We pursue quantum experiments with membranes that are macroscopic and nano-scale at the same time: they are a millimeter across in size, so that the can be discerned with bare eye—but only 100 nm thick, that is just some thousand atom layers.

Quantop research: Quantum Membranes

 About the Quantop research group: QUANTOP offers both specialized courses on the bachelor and master level as well as contributing to the overall teaching and research aims of the NBI. The center is funded by an ERC starting grant and DARPA, and the group is world leading in its research fields of quantum optics, atomic physics and optomechanics.

QUANTOP – Center for Macroscopic Quantum Systems

The Danish Center for Quantum Optics (QUANTOP) started as a DNRF "Center of Excellence" in 2001. QUANTOP’s research is focused on exploring quantum effects at the interface between light and matter.

Quantum Photonics
We investigate the quantum interaction between light and nanophotonic semiconductor materials. Our quest is to develop methods to coherently control the coupling between photons and matter utilizing tailored nanophotonic structures such as photonic crystals.
Theoretical Quantum Optics
The theoretical quantum optics group investigates how to control and exploit individual quantum systems, such as single atoms and photons.
Quantum Optomechanics
Our research presently focuses on hybrid systems involving nano- and micromechanical oscillators in, or at the verge to, the quantum regime.
Quantum Metrology
The group works with experimental setups in the laboratory, where the atoms are trapped in a magnetic field, where they are held by precise beams of laser light and are cooled down to near absolute zero, minus 273 degrees Celsius. The result is an atomic clock that is now so precise that it only loses one second every 300 million years.

About the Quantum Optics and Ultracold Atoms section: The permanent faculty members within the section are Professor Peter Lodahl , Associate professor Joerg H. Müller, Professor Eugene S. Polzik (head of the section), Professor Albert Schliesser, Professor Anders S. Sørensen, and Professor Jan W. Thomsen. Read more about the section >>

Research at Quantop
At QUANTOP - the Quantum Optics Center – we study quantum effects at light-matter interface. Particles of light, photons, are great for creating, reading out and transmitting quantum information between material objects.
Staff and students
See the list of the Quantop Optics staff at the Niels Bohr Institute, University of Copenhagen.
Quantop publications
List of publications by the Quantop Optics staff.
Become a student
List of courses by QUANTOP.
Smart atomic cloud solves Heisenberg's observation problem
Quantum physics: 13 July 2017

Smart atomic cloud solves Heisenberg's observation problem

Scientists at the Niels Bohr Institute, University of Copenhagen have been instrumental in developing a 'hands-on' answer to a challenge intricately linked to a very fundamental principle in physics: Heisenberg's Uncertainty Principle. The NBI-researchers used laser light to link caesium atoms and a vibrating membrane. The research, the first of its kind, points to sensors capable of measuring movement with unseen precision.

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