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Feature Article: Understanding strongly correlated many‐body systems with quantum Monte Carlo simulations
Author(s) -
Lavalle Catia,
Rigol Marcos,
Muramatsu Alejandro
Publication year - 2005
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200590017
Subject(s) - quantum monte carlo , fermion , physics , quantum , monte carlo method , plateau (mathematics) , statistical physics , condensed matter physics , quantum mechanics , mathematics , statistics , mathematical analysis
The cover picture of the current issue, taken from the Feature Article [1], depicts the evolution of local density (a) and its quantum fluctuations (b) in trapped fermions on one‐dimensional optical lattices. As the number of fermions in the trap is increased, figure (a) shows the formation of a Mott‐insulating plateau (local density equal to one) whereas the quantum fluctuations – see figure (b) – are strongly suppressed, but nonzero. For a larger number of fermions new insulating plateaus appear (this time with local density equal to two), but no density fluctuations. Regions with non‐constant density are metallic and exhibit large quantum fluctuations of the density. The first author Catia Lavalle is a Postdoc at the University of Stuttgart. She works in the field of strongly correlated quantum systems by means of Quantum Monte Carlo methods (QMC). While working on her PhD thesis at the University of Stuttgart, she developed a new QMC technique that allows to study dynamical properties of the t – J model.