Atom chips: quantum gases on the (sub)micron scale
Peter Kruger,
School of Physics and Astronomy, The University of Nottingham
The field of ultracold atoms links atomic and condensed matter
physics. The development of laser cooling and trapping techniques,
including the ability to routinely produce quantum degenerate gases,
has advanced to the point where non-trivial complex quantum systems
can be prepared and controlled, and their subsequent evolution can be
observed. This ability opens the path to investigations of
non-equilibrium dynamics of interacting quantum many-body systems and
device-oriented quantum technology development alike. In this talk I
will introduce the concept of an atom chip and show how such a
miniaturized and integrated manipulation toolbox for quantum gases
leads to a large variety of new possibilities for both fundamental
science and applied technology. As a key example of the intimate
relation to condensed matter physics, I will illustrate how new
materials and geometries, such as graphene films, provide means to
further miniaturization, where the separation of a nanokelvin trapped
gas and a room-temperature solid can be reduced to well within a
micron. I will discuss new possibilities for studies of
non-equilibrium dynamics arising in this regime, in which the gas's
environment can be tailored with a resolution beyond relevant
intrinsic length scales (healing length). Conversely, a quantum gas
trapped at a micron or less distance from a surface is a highly
sensitive probe for structure and transport within the solid, where
high spatial resolution and field sensitivity are uniquely combined.