ELFT HÍRADÓ

[Szeminárium koordinátor <sem-admin AT szfki.hu>]

SZFI SeminarLegeza ÖrsWigner RCP SZFINovel approaches in material science and 
ab initio quantum chemistry via tensor network state methodsTuesday, 5 April 
2022, 10:00, Bldg 1, auditorium,  
https://wigner-hu.zoom.us/j/86542169672?pwd=Nkl5MkRnc1YxcW5iOElzeXhZNDQ2Zz09  
 Meeting ID: 865 4216 9672  Passcode: 787267Tensor network states and 
specifically matrix-product states have proven to be a powerful tool for 
simulating strongly correlated spin and fermionic systems. In this 
contribution, we overview tensor network state techniques that can be used 
for the treatment of high-dimensional optimization tasks used in many-body 
quantum physics with long-range interactions and ab initio quantum chemistry. 
We will also discuss the controlled manipulation of the entanglement, which 
is in fact the key ingredient of such methods, and which provides relevant 
information about correlations. Recent developments on fermionic orbital 
optimization, tree tensor network states, multipartite entanglement, 
time-dependent variational principle (TDVP), externally corrected coupled 
cluster density matrix renormalization group (DMRG-TCCSD) method, will be 
discussed in more detail. Finally, new results will be shown for extended 
periodic systems in one- and two dimensions, for topologically protected end 
spins in carbon nanotubes, for transition metal complexes, graphene 
nanoribbons and Wigner crystals. Minden érdeklődőt szívesen látunk! - 
Everyone is welcome to attend.Róbert Juhászsem-admin AT szfki.hu