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SUMMARY:Quantum flutter of supersonic particles in one-dimensional quantum
  liquids - Charles Mathy\, Harvard University
DTSTART:20120525T143000Z
DTEND:20120525T153000Z
UID:TALK38139@talks.cam.ac.uk
CONTACT:Daniel Cole
DESCRIPTION:I will present exact results on the dynamics of an impurity in
 jected at a supersonic velocity into a one-dimensional quantum liquid [1].
  Two main surprising results are revealed in the analysis. Firstly\, the m
 omentum of the impurity does not decay to zero\, instead it forms a strong
 ly correlated state that propagates at a reduced velocity. Secondly\, the 
 system undergoes coherent oscillations in which the impurity vibrates with
  respect to its correlation hole. These oscillations\, which we call quant
 umflutter\, have their origin in a long-lived coherent quantum superpositi
 on of two families of quasi-equilibrium states in the system. These result
 s provide the first example of new physics\ndue to supersonic propagation 
 in a strongly coupled non-relativistic many-body system. Furthermore\, the
  main features are robust to changes in parameters of the system\, suggest
 ing that they may be a generic feature of one-dimensional quantum systems.
 \n\nReferences:\n[1] C.J.M. Mathy\, M.B. Zvonarev and E. Demler. Quantum f
 lutter of supersonic particles in one-dimensional quantum liquids. arXiv:1
 203.4819 [cond-mat.quant-gas]
LOCATION:TCM Seminar Room\, Cavendish Laboratory
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