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Computational Physics

Computational techniques being developed for open quantum systems which allow for  the simulation  of the  dynamical  behaviour  of realistic  quantum technological  systems  on  the  nanoscale  level, for example  semiconductor defects  and  quantum  dots.    These  computational methods  should  make possible  the  first  principle  calculations  which  are  currently   beyond  the realm  of standard approaches.   In recent  years Monte  Carlo  Wave  Func- tion  (Quantum Monte  Carlo)  techniques  have been shown to provide an efficient  numerical  tool.  In these  techniques  one propagates  an ensemble of stochastic  state  vectors in the open system’s state  space such that  the reduced density matrix  is recovered through  an appropriate ensemble aver- age. These techniques have been well developed and have proven sufficient to describe Markovian  systems  and some strongly coupled non-Markovian systems.   Specific projects in this  area  are presently  aimed at  simulating the dynamics  of atoms  in the double optical  lattice  and using Markovian techniques to simulate non-Markovian  dynamics in open quantum  systems.

 

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