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SUMMARY:Iterative Perturbative Method for a Study of Disordered Strongly C
 orrelated Systems
DTSTART;VALUE=DATE-TIME:20121018T131500Z
DTEND;VALUE=DATE-TIME:20121018T134500Z
DTSTAMP;VALUE=DATE-TIME:20261011T002029Z
UID:indico-contribution-184@indico.ipb.ac.rs
DESCRIPTION:Speakers: Jaksa Vucicevic (Institute of Physics Belgrade\, Bel
 grade University\, Pregrevica 118\, 11080 Belgrade)\nTwenty years after th
 e introduction of the Dynamical Mean Field Theory as a means of solving th
 e Hubbard model\, the focus has moved towards computationally very intensi
 ve multi-site and multi-orbital calculations\, which are aimed at includin
 g spatial correlations\, disorder and detailed atomic structure to the oth
 erwise fairly simple model. However\, limited computational resources crea
 te a need for faster and more optimized codes and even approximative solut
 ions. We present here a highly optimized parallel implementation of the ap
 proximative second order perturbative approach especially suitable for a s
 tudy of strongly disordered correlated systems. On this example\, we give 
 an overview of numerical challenges that arise in dealing with large syste
 ms of non-linear equations\, ill-behaved discretized functions and self-co
 nsistent calculations in general. In the end\, we discuss results of perfo
 rmance tests\, outline possible improvements and make a comparison to the 
 exact\, but computationally very demanding Quantum Monte Carlo method.\n\n
 https://events.saifa.rs/event/291/contributions/184/
LOCATION:National Library of Serbia
URL:https://events.saifa.rs/event/291/contributions/184/
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