Zobrazeno 1 - 10
of 94
pro vyhledávání: '"Adelhardt, P."'
We study the XXZ square lattice bilayer model with antiferromagnetic non-frustrating long-range interactions that decay as a power law with the distance. Employing large-scale high-order series expansions with classical Monte Carlo integration (pCUT+
Externí odkaz:
http://arxiv.org/abs/2408.13145
Long-range interactions are relevant for a large variety of quantum systems in quantum optics and condensed matter physics. In particular, the control of quantum-optical platforms promises to gain deep insights in quantum-critical properties induced
Externí odkaz:
http://arxiv.org/abs/2403.00421
We investigate the quantum phase diagram of the $J_1$-$J_2$-$J_3$ antiferromagnetic transverse-field Ising model on the ruby lattice. In the low-field limit we derive an effective quantum dimer model, analyzing how the extensive ground-state degenera
Externí odkaz:
http://arxiv.org/abs/2312.12941
Autor:
Adelhardt, P., Schmidt, K. P.
We investigate the quantum-critical behavior between the rung-singlet phase with hidden string order and the N\'eel phase with broken $SU(2)$-symmetry on quantum spin ladders with algebraically decaying unfrustrated long-range Heisenberg interactions
Externí odkaz:
http://arxiv.org/abs/2209.01182
Publikováno v:
SciPost Phys. 13, 088 (2022)
The hyperscaling relation and standard finite-size scaling (FSS) are known to break down above the upper critical dimension due to dangerous irrelevant variables. We establish a coherent formalism for FSS at quantum phase transitions above the upper
Externí odkaz:
http://arxiv.org/abs/2203.08081
Autor:
Jahromi, Saeed S., Hörmann, Max, Adelhardt, Patrick, Fey, Sebastian, Karamnejad, Hooman, Orus, Roman, Schmidt, Kai Phillip
We combine tensor-network approaches and high-order linked-cluster expansions to investigate the quantum phase diagram of the antiferromagnetic Kitaev's honeycomb model in a magnetic field for general spin values. For the pure Kitaev model, tensor ne
Externí odkaz:
http://arxiv.org/abs/2111.06132
Publikováno v:
Entropy, Vol 26, Iss 5, p 401 (2024)
Long-range interactions are relevant for a large variety of quantum systems in quantum optics and condensed matter physics. In particular, the control of quantum–optical platforms promises to gain deep insights into quantum-critical properties indu
Externí odkaz:
https://doaj.org/article/0d8841aad6df476f9a2d1dc3e9aa8f84
Publikováno v:
Phys. Rev. B 102, 174424 (2020)
The critical breakdown of a one-dimensional quantum magnet with long-range interactions is studied by investigating the high-field polarized phase of the anisotropic XY model in a transverse field for the ferro- and antiferromagnetic case. While for
Externí odkaz:
http://arxiv.org/abs/2007.16128
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