[seminar] reminder: seminar today 04. 07. 2022. at 14:15 - Andrey S. Mishchenko: Further development of the precision many-body methods for the studies of the physics of high T_c superconductors, chiral magnets, anomalous Hall effect, etc.

[Sanjin Benić]

Drage kolegice i kolege,

ovo je podsjetnik na danasnji Fizičkog odsjeka u hibridnom izdanju
(uzivo+online uz zoom link u nastavku)

Dear colleagues,
this is a reminder for today's seminar of the Department of Physics in
hybrid edition (live+online with zoom link below)

ponedjeljak/Monday 04. 07. 2022. u 14:15 u F201

poveznica: https://zoom.us/j/8205066086
id: 820 506 6086

Further development of the precision many-body methods for the studies of

the physics of high T_c superconductors, chiral magnets, anomalous
Hall effect, etc.

Andrey S. Mishchenko

RIKEN Center for Emergent Matter Science (CEMS), 2-1 Hirosawa, Wako,
Saitama, Japan

Development of Diagrammatic Monte Carlo and Stochastic Optimization
Analytic Continuation

methods led to substantial progress in study of many-body effects in
high temperature

superconductors which was achieved on the initial stage of the methods
development.

However, our studies of variety of novel compounds and phenomena led
us to conclusion

that our methods require substantial further development to include
novel physical properties and

phenomena (e.g. optical conductivity, mobility, superconducting
properties, magnetic phenomena,

movement of resonance fermions in cold gases, topological properties,
etc.). Moreover, a serious

emphasis on the word ``precision" in the implementations of many-body
methods must be made.

To achieve the above goal, we developed Stochastic Optimization
Consistent Constrains Analytic

Continuation method. This method can be considered as the first method
of analytic continuation

which can estimate of the error-bars of the analytic continuation
result and, thus, can guarantee the

maximal “precision” of the answer. Another substantial progress is the
further development of the

Diagrammatic Monte Carlo which can give precise answers for
many-fermion problems

(thus, circumventing famous fermion sign-problem in quantum Monte
Carlo, including frustrated

magnetic systems). This method is reinforced recently by capability of
calculating optical conductivity

and mobility, and can be applied to frustrated magnets and topological
insulators.

Cjeloviti oglas je u prilogu./Formatted announcement is attached.

Lijep pozdrav / Best regards
Sanjin Benic i Damjan Pelc
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