35 citations · 209 across the 9 of their papers we have counts for
9 papers
iPEPS study of spin symmetry in the doped - model
Jheng-Wei Li, Benedikt Bruognolo, Andreas Weichselbaum +1
We study the two-dimensional - model on a square lattice using infinite projected entangled pair states (iPEPS). At small doping, multiple orders, such as antiferromagnetic o…
A beginner's guide to non-abelian iPEPS for correlated fermions
Benedikt Bruognolo, Jheng-Wei Li, Jan von Delft +1
Infinite projected entangled pair states (iPEPS) have emerged as a powerful tool for studying interacting two-dimensional fermionic systems. In this review, we discuss the iPEPS co…
Matrix product state techniques for two-dimensional systems at finite temperature
Benedikt Bruognolo, Zhenyue Zhu, Steven R. White +1
The density matrix renormalization group is one of the most powerful numerical methods for computing ground-state properties of two-dimensional (2D) quantum lattice systems. Here w…
Spin fluctuations in the 0.7-anomaly in quantum point contacts
Dennis H. Schimmel, Benedikt Bruognolo, Jan von Delft
It has been argued that the 0.7 anomaly in quantum point contacts (QPCs) is due to an enhanced density of states at the top of the QPC-barrier (van Hove ridge), which strongly enha…
Open Wilson chains for quantum impurity models: Keeping track of all bath modes
Benedikt Bruognolo, Nils-Oliver Linden, Frauke Schwarz +6
When constructing a Wilson chain to represent a quantum impurity model, the effects of truncated bath modes are neglected. We show that their influence can be kept track of systema…
Anatomy of quantum critical wave functions in dissipative impurity problems
Zach Blunden-Codd, Soumya Bera, Benedikt Bruognolo +5
Quantum phase transitions reflect singular changes taking place in a many-body ground state, however, computing and analyzing large-scale critical wave functions constitutes a form…
Dynamic structure factor of the spin-1/2 XXZ chain in a transverse field
Benedikt Bruognolo, Andreas Weichselbaum, Jan von Delft +1
The spin- XXZ chain with easy-plane anisotropy in a transverse field describes well the thermodynamic properties of the material in a wide range of…
Symmetric Minimally Entangled Typical Thermal States
Benedikt Bruognolo, Jan von Delft, Andreas Weichselbaum
We extend White's minimally entangled typically thermal states approach (METTS) to allow Abelian and non-Ablian symmetries to be exploited when computing finite-temperature respons…
Two-bath spin-boson model: Phase diagram and critical properties
Benedikt Bruognolo, Andreas Weichselbaum, Cheng Guo +3
The spin-boson model, describing a two-level system coupled to a bath of harmonic oscillators, is a generic model for quantum dissipation, with manifold applications. It has also b…