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SUMMARY:Quantum Simulations of Ballistic Motion - Matthew Ord\, Cavendish 
 Laboratory\, University of Cambridge
DTSTART:20260203T140000Z
DTEND:20260203T150000Z
UID:TALK243997@talks.cam.ac.uk
CONTACT:Boyao Liu
DESCRIPTION:As an adsorbate moves on a surface\, it is constantly feeling 
 the effect of the environment. The environment interactions are felt as a 
 static background interaction\, and a frictional force which randomizes th
 e motion and leads to decoherence of the system. \nFor a markovian interac
 tion at short timescales\, the frictional force does not directly influenc
 e the dynamics of the system\, and the overall behaviour becomes determini
 stic. The short timescale behaviour is known as ballistic motion\, dependi
 ng only on the initial state of the system and a static background interac
 tion. \nIn this talk\, we will discuss experimental measurements of ballis
 tic motion of adsorbates using the Spin-Echo technique\, which found that 
 the typical rate of ballistic motion was less than would be expected class
 ically. We then use a ‘closed quantum’ simulation to analyse the diffe
 rent factors that contribute to changing the rate of ballistic motion in t
 hese systems and discuss the extent to which experimental factors might in
 fluence the measurement of ballistic motion.
LOCATION:B2.009\, Ray Dolby Centre\, Cavendish Laboratory
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