BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Quantum gases in micro-engineered environments near surfaces - Pet
 er Kruger (Nottingham University)
DTSTART:20111128T153000Z
DTEND:20111128T170000Z
UID:TALK34100@talks.cam.ac.uk
CONTACT:6270
DESCRIPTION:Integrating and miniaturising atom cooling and trapping geomet
 ries can be used for efficient and versatile production of quantum degener
 ate gases in the vicinity of atom chips.  This concept has been successful
 ly used in forming a variety of microtraps based on static and oscillating
  magnetic and electric fields. For example\, coherent beam splitters for m
 atter waves have been devised\, enabling studies of coherence and thermali
 sation in ultracold one-dimensional Bose gases. \n\nHere we present furthe
 r techniques that can be employed to microscopically engineer the environm
 ent of quantum gases. The possibilities include forming non-trivial geomet
 ries and topologies\, such as rings\, cylinders and hollow tori. Beyond mo
 difying the trapping potential\, control of magnetic fields allows microsc
 opic local and fast temporal tailoring of the interaction strength within 
 the gas\, opening the path to a new set of experiments. For example\, inho
 mogeneous interaction strength results in inhomogeneous critical parameter
 s for thermal and quantum phase transitions as well as in inhomogeneous ve
 locity of sound. We will discuss how such inhomogeneities can potentially 
 be used to study proximity effects and phonon production in a constant vel
 ocity gas flow undergoing the transition from subsonic to supersonic speed
 .\n\n\n
LOCATION:Rutherford building\, Seminar Room B
END:VEVENT
END:VCALENDAR