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Trapped Ions and Quantum Information
IPIQ
We are using trapped, laser-cooled ions to invent new devices for the manipulation of quantum information, demonstrate new quantum operations or improve the performance of existing ones.
In this context, we have several parallel approaches
the development of a linear Paul trap able to confine a macroscopic cloud of ions (some tens of thousands) in a very anisotropic geometry (several millimeters by tens of microns). This will provide us with an optically dense medium, which will act as a robust storage medium for quantum information carried by light. More information
a theoretical study of quantum information protocols under experimentally realistic situations. Among those, the understanding and control of the decoherence of quantum states is a key problem. We use an original approach where protection against decoherence of quantum states is achieved via their topological properties. More information
the study of new sub-millimeter-size traps fabricated using micro-electronics techniques.
This will allow for the integration of a large number of elementary quantum building blocks to obtain complex devices.
the realization of efficient numerical techniques, which help us create new traps with original geometries, as well as understanding the collective behavior of the ions in presence of laser cooling and of various heating sources. An important problem in this context is the phase transition which appears as the mean kinetic energy becomes smaller than the electrostatic interaction energy between nearest neighbours, forming an ordered phase with a quasi-cristalline order.
The IPIQ team is member of Institut Francilien de Recherche sur les Atomes Froids
