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Equilibrium Quantum Impurity Problems via Matrix Product State Encoding of the Retarded Action
Benedikt Kloss, Julian Thoenniss, Michael Sonner +6
In the dimensional imaginary-time path integral formulation of quantum impurity problems, the retarded action encodes the hybridization of the impurity with the bath. In this…
Extracting Off-Diagonal Order from Diagonal Basis Measurements
Bo Xiao, Javier Robledo Moreno, Matthew Fishman +3
Quantum gas microscopy has developed into a powerful tool to explore strongly correlated quantum systems. However, discerning phases with topological or off-diagonal long range ord…
The Hubbard model on the Bethe lattice via variational uniform tree states: metal-insulator transition and a Fermi liquid
Peter Lunts, Antoine Georges, E. Miles Stoudenmire +1
We numerically solve the Hubbard model on the Bethe lattice with finite coordination number , and determine its zero-temperature phase diagram. For this purpose, we introduce…
Faster Methods for Contracting Infinite 2D Tensor Networks
M. T. Fishman, L. Vanderstraeten, V. Zauner-Stauber +2
We revisit the corner transfer matrix renormalization group (CTMRG) method of Nishino and Okunishi for contracting two-dimensional (2D) tensor networks and demonstrate that its per…
Compression of Correlation Matrices and an Efficient Method for Forming Matrix Product States of Fermionic Gaussian States
Matthew T. Fishman, Steven R. White
Here we present an efficient and numerically stable procedure for compressing a correlation matrix into a set of local unitary single-particle gates, which leads to a very efficien…