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SUMMARY:Ultra-cold bosonic gases in one-dimension - Dr Thomas Busch (Unive
 rsity College Cork)
DTSTART:20090602T160000Z
DTEND:20090602T170000Z
UID:TALK18750@talks.cam.ac.uk
CONTACT:6270
DESCRIPTION:Restricting the dimensionality of many-body systems can not on
 ly lead to new and interesting physics\, but often allows for simpler theo
 retical treatment or even exactly solvable models. This possibility of det
 ailed understanding in turn creates opportunities to\ndevelop engineering 
 schemes to test new concepts and ideas.\nHere we will show how a simple ma
 thematical model of a one-dimensional split trap can be used to describe t
 he realistic properties of a gas of ultracold\, neutral bosons in the pres
 ence of an impurity\, for example an ion. Within this exact mdel we can th
 en calculate the full RSPDM for samples with a medium number of particles 
 and find that the coherence is an oscillating function of the particle num
 ber.\n From this we will present a model for entanglement between spatial 
 modes in a cold gas and how it can be interpreted as a consequence of spat
 ial coherence. While for ideal gases temperature and external\ntrapping ar
 e the only control parameters\, we will show that in strongly correlated s
 ystems the amount of entanglement present can be engineered by controlling
  the inter-particle interaction.\n\n
LOCATION:RutherfordEP Seminar Room (980) Rutherford Building\, Cavendish L
 aboratory
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