205 citations · 464 across the 5 of their papers we have counts for
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Valence bond distribution and correlation in bipartite Heisenberg antiferromagnets
David Schwandt, Fabien Alet, Masaki Oshikawa
Every singlet state of a quantum spin 1/2 system can be decomposed into a linear combination of valence bond basis states. The range of valence bonds within this linear combination…
Phase Diagram of a Frustrated Quantum Antiferromagnet on the Honeycomb Lattice: Magnetic Order versus Valence-Bond Crystal formation
A. F. Albuquerque, D. Schwandt, B. Hetényi +3
We present a comprehensive computational study of the phase diagram of the frustrated S=1/2 Heisenberg antiferromagnet on the honeycomb lattice, with second-nearest (J2) and third-…
Generalized Hardcore Dimer Models approach to low-energy Heisenberg frustrated antiferromagnets: general properties and application to the kagome antiferromagnet
David Schwandt, Matthieu Mambrini, Didier Poilblanc
We propose a general non-perturbative scheme that quantitatively maps the low-energy sector of spin-1/2 frustrated Heisenberg antiferromagnets to effective Generalized Quantum Dime…
Effective Quantum Dimer Model for the Kagome Heisenberg Antiferromagnet: Nearby Quantum Critical Point and Hidden Degeneracy
Didier Poilblanc, Matthieu Mambrini, David Schwandt
The low-energy singlet dynamics of the Quantum Heisenberg Antiferromagnet on the Kagome lattice is described by a quantitative Quantum Dimer Model. Using advanced numerical tools,…
Quantum Monte Carlo simulations of fidelity at magnetic quantum phase transitions
David Schwandt, Fabien Alet, Sylvain Capponi
When a system undergoes a quantum phase transition, the ground-state wave-function shows a change of nature, which can be monitored using the fidelity concept. We introduce two Qua…