Harnessing cold atoms to empower quantum technologies

Add to your list(s) Download to your calendar using vCal

• Dr Marco Koshorreck, University of Bonn
• Tuesday 06 May 2014, 11:45-12:45
• Pippard Lecture Theatre, Cavendish Laboratory, Department of Physics.

If you have a question about this talk, please contact Leona Hope-Coles.

The ability to control the internal and external degrees of freedom of individual or ensembles of atoms has been breathtaking in the last three decades. Nowadays, laser cooled atoms and degenerate quantum gases are almost routinely produced in many laboratories all over the world. This rapid development has produced a tremendous interest in utilizing atomic systems to explore their quantum properties in technological applications such as quantum information processing, quantum sensing, and quantum computation. I will present experiments that demonstrate a few of those quantum technologies: First, a quantum metrology application of optically trapped and laser-cooled rubidium 87 atoms is presented. Where, we have been able to produce a spin squeezed state of an ensemble of one million atoms, which shows a twofold sensitivity enhancement compared to the standard quantum limit. Second, two-dimensional Fermi gases of ultracold potassium 40 atoms serve as a quantum simulator for many-body physics in two dimensions. As an example, the physics of a single fermionic spin impurity in a fermionic bath is studied and the defining properties of the emergent quasi-particle – the Fermi polaron – are determined. Further, the limits of spin diffusion are explored for a strongly interacting two-dimensional Fermi gas and we observe the lowest spin diffusivity ever measured. In the end, will outline a possible quantum information platform based on single neutral atom strongly coupled to the electromagnetic field mode of nano-photonic structures.

This talk is part of the Special Departmental Seminars series.

This talk is included in these lists:

• All Cavendish Laboratory Seminars
• Centre for Health Leadership and Enterprise
• Featured lists
• ME Seminar
• Neurons, Fake News, DNA and your iPhone: The Mathematics of Information
• Pippard Lecture Theatre, Cavendish Laboratory, Department of Physics
• School of Physical Sciences
• Special Departmental Seminars
• Thin Film Magnetic Talks

Note that ex-directory lists are not shown.